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Journey Level Exam PrepJourney Level Exam Prep

Inland Northwest Industrial TrainingInland Northwest Industrial Training

www.inw-training.comwww.inw-training.com

Today's Instructor

Frank Seiler

[email protected]

(509) 991-3019

33

DISCLAIMERDISCLAIMERThis course is approved for CEU's in This course is approved for CEU's in Washington StateWashington StateWe do not represent any jurisdiction (AHJ) We do not represent any jurisdiction (AHJ) including Washington State department of Labor including Washington State department of Labor and Industriesand IndustriesFor a formal interpretation always consult you For a formal interpretation always consult you local AHJlocal AHJThis presentation is not meant to provide legal This presentation is not meant to provide legal advice. It is up to each individual to understand advice. It is up to each individual to understand and comply with state and local laws.and comply with state and local laws.

Candidate Bulletin● All examinations are open book. It is okay to use original

copyrighted material, and a silent, nonprinting, nonprogrammable calculator. Copies of the Washington state RCW/WAC downloaded from the internet are acceptable, provided they are in a binder.

● Copyrighted material may have highlighting, underlining, and index tabs (permanent only) prior to entering the examination area. Post-It, sticky, repositionable and other types of notes that are removable are not permitted. References may not be written in.

● Two sheets of paper and a pencil will be collected at end of the examination

Suggested Materials● 2008 National Electrical Code (used for testing til

sometime mid-2015) – softcover

● NEC Tabs

● Most recent RCW/WAC; printed & holepunched; in a binder with permanent tabs

● UGLY's Electrical Reference

● Tom Henry's Keyword Index – be sure it matches your edition of NEC

● Highlighters, colored pencils, ruler

● Calculator that is easy to read with LARGE keys

Know what is on the test

Test Breakdown 1General Journey Level Test 3 Hrs Code and Theory; 1 Hr RCW/WAC

Code Sections

-Art 90 Introduction 1

-Art 100/110 Gen Requirements 3

-Art 200-225/280-285 Wiring & Protection 3

-Art 230 Services 4

-Art 240 Overcurrent Protection 6

-Art 250 Grounding & Bonding 6

-Art 300-398 Wiring Methods 10

Test Breakdown 2Code Sections

-Art 400-427; 455-480 Equipment Gen Use 3

-Art 430-450 Motors; Transformers; HVAC 3

-Art 490 Equipment over 600V 1

-Art 510-516 Hazardous Locations 2

-Art 517-590 Special Occupancies 4

-Art 600-695 Special Equipment 3

-Art 700-702 Emergency & Standby Sys. 2

-Art 705-780 Special Conditions 1

-Art 800-830 Communication Systems 1

Test Breakdown 3Code Sections

-General Trade Knowledge and Theory 7

-RCW/WAC 17 (Not a part of this class)

Total questions on the Journey Level Test 60 (plus RCW/WAC)

Preparing your Code Book

● Tabs– standard tabs recommend NFPA color coded

● Highlight– Use a light color for key terms

– Use a more intense color for tables or paragraphs to stand out, section headings

● Underline– Key words in a highlighted paragraph

– Add lines to blocky tables and TOC (eg. Annex C index)

Structure of the NEC

Chapter 1 Pretest

● 10 Questions● 30 Minutes

Question 1

● The conductors or equipment required or permitted by the Code shall be acceptable only if approved by:– A. The Authority Having Jurisdiction

– B. A Nationally Recognized Testing Laboratory (NRTL)

– C. The owner of the facility

– D. The registered engineer supervising the job

Question 1 Method

● The question is about the term approved● Index → “Approval, approved” → “Equipment and

materials, 90.4, 90.7, 110.2, 500.8(A), Annex H 80.19”

● Review the above references; only art 90 & 110 could apply but 110.2 does not answer the question

● Return to Index → “Definition, Art 100”

Question 2

● A 480V Motor control center is located opposite a 120/208V panelboard. What is the minimum working clearance between the motor control center and the panelboard?– A. 3'

– B. 3-1/2'

– C. 4'

– D. 6'

Question 2 – Method

● The question is about working space in front of electrical equipment.

● Index: “Working Space” → “About electrical equipment, 110.26, 110.32 ...”

● Peruse 110.26 where you are directed to T110.26(A)

● Select appropriate condition and voltage to determine distance

Question 3

● Which one of the following statements about a cabinet is true?– A. It differs from a cutout box in that the cover is

removable

– B. It may be part of a switchboard

– C. It may not be installed in a residence

– D. It may not be installed in a wet location


● The question is about a cabinet. The answers are split into what it is vs what it may be used for

● Run with the first option and see where it is defined: Index: “Cabinets, cutout boxes, and meter socket enclosures” → “Definitions, Art 100-Part I”

● Check definitions for “cabinet” and “cutout box” to determine if you need to search further

● If you do, back to Index: “Cabinets, cutout boxes, and meter socket enclosures” → and search for uses permitted/not permitted

Question 4

● Equipment approved for use in dry locations only shall be protected against permanent damage from the weather during– A. Design

– B. Building Construction

– C. Inspection

– D. None of these


● Question is about requirements for materials suited only for dry locations

● Index: “Dry Locations, 110.11...”● Looking at 110.11, noticing the heading, read on to

see which answer matches best

Question 5

● Enclosures housing electrical apparatus that are controlled by lock and key are considered– A. Readily accessible

– B. Accessible

– C. Available

– D. None of these


● Question is really about whether the equipment is impeded for access, whose rules are part of “working space” → there is no good index way of finding it

● Index: “Working space about electrical equipment, 110.26, 110.32 through 110.34...”

● Find reference to locks and code considerations associated with them

Question 6

● Which of these is not considered an “outlet” according to the NEC?– A. An adjustable speed drive

– B. A duplex receptacle in a garage ceiling

– C. A rooftop air conditioning unit

– D. A sump pump in a commercial occupancy


● The question is about the definition of the term “Outlet”

● → Art 100 definitions

Question 7

● Where no temperature limitations are indicated on equipment connections rated 100A or less, conductors shall be sized based on which column of the ampacity tables?– A. 60°C

– B. 75°C

– C. 90°C

– D. depends on conductor insulation


● The question is about terminal ratings for equipment

● Index “Terminals” → “Connections to, 110.14, 250.8, 250.68”

● Art 250 is grounding so not applicable – go to 110.14 and look at the various termination limitations

Question 8

● Which of the following outdoor enclosures provides a measure of protection against corrosive environments?– NEMA 3

– NEMA 3X

– NEMA 3R

– NEMA 3S


● The question is about suitability of enclosures● Index: “Enclosures” → “Outdoor use, for, Table

110.20”

Question 9

● A switchboard is considered large equipment if it is rated 1200 amperes– A. any width

– B. or over 6' wide

– C. or over 8' wide

– D. and over 6' wide


● Question is about large equipment as it pertains to switchboards. The index is a poor help here. What is affected by the size?

● Index: “Switchboards” → “Working spaces about, 110.26”

Question 10

● Equipment operates for several minutes before the overcurrent device trips. After a while, the overcurrent device is reset, and the equipment operates for several minutes before tripping. When the device is reset immediately, it trips within a few seconds. The type of overcurrent described is

● A. a short circuit● B. a ground fault● C. an overload● D. none of the above


● This is a general knowledge question about how an inverse-time (common) circuit breaker operates.

● Art 100, definitions is of help looking at the definitions of “overcurrent” and “overload”

Chapter 2 Pretest


Question 11

● For Inductive lighting loads, the branch circuits supplying lighting units having ballasts, transformers, or autotransformers shall have the computed load based on which one of the following?– A. The total ampere ratings of the units

– B. The total watts of the lamps

– C. The total rating of the lampholders

– D. 100% of the rating of the overcurrent device supplying the units

Question 11

● The question is about the calculated load of a branch circuits supplying inductive lighting loads

● Index → “Loads” → “Branch Circuits” → “Maximum, 220.18”

● 220.18(B) Inductive Lighting Loads● Provides that the computed load of a branch circuit

supplying ballasted lighting units shall be based on the total ampere rating of the units, not the total watts of the lamps

Question 12

● Which of the following statements of connecting the grounded conductor to devices is NOT correct?– A. A receptacle terminal intended for connection to the

grounded conductor shall be identified by metal substantially white in color

– B. If the grounded terminal is not visible, the conductor entrance hole is to be colored white or marked with the word White or the letter W

– C. For screw-shell devices the grounded conductor terminal shall be the one connected to the screw shell

– D. Non-polarized 2 wire attachment plugs require identification of the grounded conductor terminal by the shape of the plug prong


● The question is about terminal identification and polarity of connections

● Index → “Terminals” → “Identification” → “Polarity, 200.9 – 200.11”

● Scan through these references and note the requirements in 200.10 – you will find three of them. The fourth is not an NEC requirement.

Question 13

● An 800 ampere, single phase service entrance disconnect is supplied by two 500-kcmil conductors in parallel per phase, including the neutral, in two 3” RMC raceways. The raceways are provided with bonding bushings. Determine the size of the bonding jumpers to these bushings.– A. 1/0

– B. 2/0

– C. 3/0

– D. 4/0


● Index → “Bonding Jumpers” → “Jumpers, Bonding”● Ok, Index → “Jumpers, Bonding” → “Service

Equipment, 250.28, 250.92(B), 250.102(C)”● The latter applies as you scan all three references

and you use T250.66 based on conductors in individual raceway

Question 14

● More than one service is permitted to supply a building or structure under all of the following conditions except:– A. For fire pumps

– B. For emergency, legally required standby, or optional standby systems

– C. Where the capacity requirement is 1600 amperes or greater

– D. Where both single and three phase power is required


● Question is about number of services permitted to supply a structure

● Index: “Services” → “Number, 230.2”● Scan 230.2 to find which of the additional services

are on the list above

Question 15

● Branch circuit conductors supplying two 4 kva wall mounted ovens and one 5 kva counter mounted cook top in a dwelling unit shall have a maximum ampacity of:– A. 30 Amperes

– B. 35 Amperes

– C. 40 Amperes

– D. 50 Amperes


● Question is about branch circuit calculations for cooking equipment

● Index: “Branch Circuits” → “Calculations of loads, 220-Part II, Annex D” leads to a lot to skim through

● Better: Index: “Appliances, household cooking, demand table, 220.55”

● Analyze text, table, and especially Note 3 in 220.55

Question 16

● What is the minimum vertical distance above final grade permitted for the lowest point of the drip loop of service-entrance conductors where the voltage does not exceed 150V to ground?– A. 7 feet

– B. 8 feet

– C. 10 feet

– D. 12 feet


● Question is about service drop conductors and clearances

● Index: “Service drops” → “Clearances, 230.24”

Question 17

● Generally, if a branch circuit supplies a single non-motor appliance rated over 13.3 amperes, the overcurrent device rating shall not eceed what percentage of the appliance rated current?– A. 100 %

– B. 115 %

– C. 125 %

– D. 150 %


● Question is about overcurrent protection for non-motor-operated appliances

● Index: “Appliances” → “Overcurrent Protection” → “Single, 210.20, 422.11(E)”

● Seeing that it is a specific type of load (appliance) go with 422.11(E) first and skim through the allowed ratings

Question 18

● A commercial building has a continuous lighting load of 33kva at 240V single phase. What are the minimum size type THW feeder conductors permitted to serve this load?– A. 1/0 AWG

– B. 2/0 AWG

– C. 4/0 AWG

– D. 250 kcmil


● Question is about feeder conductor size● Use Ohm's law to find amperes● Index: “Feeders” → “Calculation of loads, see

Loads”● Index: “Loads” → “Feeders, calculations for,

215.2(A), Art 220, Annex D”● Seeing that the installation is a feeder, start with

215.2(A), noting requirements for continuous loads, then go to the ampacity tables

Question 19

● In a dwelling unit, no point along the wall of a habitable room shall be farther than ___ feet from a receptacle outlet.– A. 2 feet

– B. 6 feet

– C. 10 feet

– D. 12 feet


● Question is about outlet spacing in dwelling units● Index: “Dwellings” → “Receptacle outlets required,

210.52, 680.22(A)”● Seeing that chapter 6 is related to special

equipment, go with 210.52, and look for spacing requirements of receptacles

Question 20● An 800 ampere overcurrent device protects a feeder consisting

of two paralleled 500 kcmil conductors per phase in two rigid metal conduits. Which one of the following statements regarding equipment grounding conductors installed in the conduits for this circuit is TRUE?

– A. A single 3 AWG conductor may be installed in one of the two conduits

– B. A single 1/0 AWG conductor may be installed in one of the two conduits

– C. A 3 AWG conductor must be installed in each of the two conduits

– D. A 1/0 AWG conductor must be installed in each of the two conduits


● Index: “Equipment grounding conductors” → “Sizing, 250.122, ...”

● Scanning 250.122 also points to 310.10(H) for conductors permitting to be made smaller by paralleling.

● Applying both sets of rules, determine number and size of equipment grounding conductors for the question

Chapter 3 Pretest


Question 21

● What is the minimum length of free unspliced conductor that may pass directly through a switch box?– A. 3”

– B. 4”

– C. 6”

– D. No Minimum Stated


● Question is about conductor length in a device box● Index → “Conductors” → “Length in boxes, 300.14”● Scan 300.14, including the exceptions

Question 22

● When two 12-AWG Type THW, three 10-AWG Type THW, and three 8-AWG Type THW conductors are installed together in the same RMC raceway, what is the minimum permitted conduit size?– A. 3/4”

– B. 1”

– C. 1-1/4”

– D. 1-1/2”


● The question is about multiple sizes of conductor fill in conduit

● Index → “Conduits” → “Conductors, number in, Ch 9 Table 1, Annex C”

● Chapter 9 Table 1 Note 6: Use Tables 5 and 4 for calculating fill

Question 23

● When making a field-bend in 1-1/2” Rigid Metal Conduit with a one-shot bending machine, the radius of the bend to the centerline of the conduit shall not be less than– A. 7.25”

– B. 8.25”

– C. 9.5”

– D. 10”


● The question is about the bending radius of RMC● Index → “Rigid Metal Conduit (RMC)” → “Bends,

344.24, 344.26”● Looking at the code section 344.24 you are

directed to Table 2, Chapter 9

Question 24

● In general, rigid polyvinyl chloride conduit approved for direct burial and carrying a 480V circuit shall be buried no less than ____ inches?– A. 6”

– B. 12”

– C. 18”

– D. 24”


● The question is about burial depths for PVC conduit● Index “Rigid polyvinyl chloride conduit (Type PVC)”

→ “Uses permitted 352.10”● Section 352.10(G) points to 300.5 and 300.50● 300.5(A) refers to Table 300.5 → find the correct

column and cover condition to determine burial depth

Question 25

● Which of the following is NOT recognized by the NEC as a raceway?– A. Busways

– B. Wireways

– C. Electrical non-metallic tubing

– D. Cable Trays


● Question hinges on the definition of a raceway.● Index → “Raceways” → “Definitions – Art 100”● Once you familiarize yourself with the definition, go

to the most likely candidate to verify. In Chapter 3 articles, .2 is reserved for the wiring method definition

Question 26

● A pull box is used for a 90° angle pull where eight 4-AWG Type THW conductors enter a box in a 1-1/2” conduit and leave without splicing in a 2” conduit. What is the minimum size pull box?– A. 9 by 9”

– B. 12 by 12”

– C. 9 by 12”

– D. 12 by 16”


● Index → “Boxes” → “Junction, pull. See Junction boxes”

● Try again: Index → “Junction boxes” → “Size” → “4 AWG and larger, 314.16, 314.28(A)”

● Scanning 314.28(A) find “Angle or U-Pulls and corresponding multipliers

Question 27

● What is the percent voltage drop for a 500 foot long circuit to a 277V 10-ampere load using 10AWG stranded copper conductor?– A. 9.9%

– B. 5.0%

– C. 3.0%

– D. 4.5%


● Chapter 9 T8 to determine K Factor (resistivity)● Use VD = (2KID)/cmil and then work out

percentage

Question 28

● All of the following types of single-story restaurants may be wired in non-metallic sheathed cable EXCEPT where it is– A. Fire rated construction with a capacity of 150 persons

– B. Fire rated construction with a capacity of 75 persons

– C. Non-fire rated construction with a capacity of 150 persons

– D. Non-fire rated construction with a capacity of 75 persons


● The question is about NM cable in a specific occupancy

● Index → “Non-metallic sheathed cable (Type NM)” → “Uses not permitted, 334.12”

● 334.12(A)(5) not permitted in places of assembly except as provided for in 518.4(B)

● Check definition of “Places of Assembly” and permissions in 518.4(B)

Question 29

● Single conductors in a ladder type cable tray in an industrial establishment under qualified maintenance shall be a minimum size of:– A. 1/0 AWG

– B. 2/0 AWG

– C. 3/0 AWG

– D. 250 kcmil


● The question is about conductors in cable tray● Index: “Cable Trays” → “Uses permitted, 230.44,

392.10”● 230 is services, so probably unrelated to question● As you look in 392.10 you will find specific

permissions for single conductors

Question 30

● The ampacity of the the branch circuit and the overcurrent device supplying outdoor deicing and snow-melting equipment must be not less than what percentage of the total load of the heater?– A. 100 percent

– B. 110 percent

– C. 125 percent

– D. 150 percent


● Question is about branch circuit sizing and protection for deicing equipment

● Index: “Deicing installations” → “Fixed outdoor electric deicing and snow melting equipment” → “Branch circuits for, 210.19(A)(4) Ex 1(e)” and → “Continuous Load, 426.4”

● Take the latter as a hint and see if it qualifies as a continuous load

Chapter 4 Pretest


Question 31

● Generally, branch circuit conductors within 3” of a ballast in a luminaire shall have a temperature rating not less than– A. 105°C

– B. 90°C

– C. 75°C

– D. 60°C

Question 31

● The question is about wiring within luminaires● Index → “Luminaires” → “Wiring, 410-Part VI”● 410-Part VI – scan below and find 410.68 Feeders

and Branch Circuit Conductors and Ballasts

Question 32

● For capacitors under 600V, means shall be provided to drain the stored charge to what voltage within what time period?– A. 50V, 1 minute

– B. 50V, 5 minutes

– C. 26V, 1 minute

– D, 26V, 5 minutes


● The question is about discharge of capacitors● Index → “Capacitors” → “600V and under” →

“Means for discharge, 460.6”● Find 460.6 and scan for “460.6(A) Time of

Discharge”

Question 33

● Which one of the following statements about knife switches is not true?– A. Single-pole knife switches shall be so placed that

gravity will not tend to close them

– B. Double-throw knife switches shall be mounted so the throw is only in the vertical position

– C. Single-pole knife switches may be mounted in the inverted position if provided with a mechanism to hold the blades open when so set

– D. Where double-throw knife switches operate vertically, an integral mechanism is required to hold the blades open when so set.


● Index → “Knife switches” - “Position, enclosed and open types 404.6

● Scan through the requirements in 404.6 and find the one not listed above

Question 34

● A 480V transformer with a two-wire secondary has a primary rating of 6 amperes and no secondary overcurrent protection. The maximum primary overcurrent device rating permitted to protect this transformer is– A. 6 A

– B. 7.5 A

– C. 9 A

– D. 10 A


● The question is about transformer overcurrent protection

● Index → “Transformers” → “Overcurrent Protection, 450.3 – 450.5”

● Scan the code section. Based on Voltage ratings, you are led to use T450.3(B)

Question 35

● A DC generator neutral conductor that must carry ground fault currents shall not be smaller than what percentage of the largest phase conductors?– A. 50%

– B. 80%

– C. 100%

– D. 125%


● Question is about sizing neutrals for generators● Index: “Generators” → “Conductor, ampacity of,

445.13”● Scan 445.13 for specifics about the neutral

conductor

Question 36

● What is the maximum locked rotor current in amperes of a 40HP 3Ph 460V motor with code letter “G”?– A. 166A

– B. 480A

– C. 316A

– D. 326A


● The question is about Locked Rotor Current based on design letter “G”

● Index is poorly worded: don't look under “Motors”● Instead Index: “Locked Rotor Motor Current” →

“Code letters, 430.7(B)”● Given in KVA/HP● Use formula in Ugly's, top of p. 18

Question 37

● Which of the following is the minimum permitted size of type THW copper branch circuit conductors supplying a continuous duty motor with a full load current of 28 amperes?– A. 14 AWG

– B. 12 AWG

– C. 10 AWG

– D. 8 AWG


● The question is about sizing motor branch circuit conductors

● Index: “Motors” → “Branch Circuits, 430-Part II”● Scan 430-Part II under which you will find “430.22

Single Motors”

Question 38

● A unit air conditioner has a hermetically sealed refrigeration compressor rated at 50 amperes RLA. The minimum permitted overcurrent protection device is unable to start the unit, therefore the manufacturer may increase the size of the overcurrent device not exceeding– A. 80 A

– B. 90 A

– C. 100 A

– D. 110 A


● The question is about short circuit and ground fault protection of air conditioning equipment branch circuits.

● Index: “Air conditioning and refrigeration equipment” → “Branch Circuit” → “Short circuit and Ground fault protection, 440-III”

● Scan 440 Part III and locate 440.2(A) Rating or setting for individual motor compressor, work through the permitted values in the paragraph

Question 39

● What is the maximum allowable size of a motor branch circuit protective device (short circuit and ground fault) that also provides overcurrent protection for a 14AWG conductor that extends from a motor controller to a remote start/stop push-button station?– A. 15A

– B. 45A

– C. 60A

– D. 100A


● The question is about overcurrent protection for motor control circuit conductors

● Index: “Motors” → “Control Circuits, 430-Part VI” ● Scan 430-Part VI and locate 430.72 Overcurrent

Protection which will direct you to Table 430.72(B)

Question 40

● Two AC single phase motors each have a full load current of 50 amperes and their branch circuits are protected by 150A non-time delay fuses. A common feeder to these two motors shall be protected by a non-time delay fuse no larger than– A. 150A

– B. 200A

– C. 250A

– D. 300A


● Question is about motor feeder overcurrent protection

● Index: “Motors” → “Overcurrent Protection” → “Motor feeders, 430-Part V”

● Scan 430 Part V to locate “430.62(A) Specific Loads” and size accordingly

Chapter 5 Pretest

● 10 Question● 30 Minutes

Question 41

● Which one of the following statements about mobile home service equipment in a mobile home park is NOT true?– A. It may be rated 60 amperes where the calculated

load of the mobile home is 50 amperes or less

– B. It may contain 50-ampere rated receptacles

– C. It may contain 20-ampere rated receptacles ONLY if they are GFCI protected

– D. Where installed outdoors, the enclosure may not be less than 24” above grade

Question 41- Method

● Question is about Mobile Home Service Equipment in a Mobile Home Park

● Index → “Mobile Home Parks” → “Mobile Home Service Equipment, 550.32”

● Find 550.32 and locate the three requirements that are valid.

Question 42

● Temporary flexible cord wiring is permitted to be laid on floors in an exhibition hall used for display booth, as in trade shows, provided it complies with one of the following:– A. Not over 150V between conductors

– B. Not a branch circuit

– C. Protected from contact by the general public. GFCI protection does not apply.

– D. Is of type SRD Cable


● Question is about temporary (cord) wiring in a place of assembly

● Index “Assembly, places of, 410.10(E), Art 518” is as far as it leads you (no temp wiring reference)

● Verify that 518 applies (check scope 518.1)● Scan Article 518 to find 518.3(B) Temporary wiring

Question 43

● In a Class I Division 2 location, where provision must be made for limited flexibility at a motor terminal, which one of the following wiring methods is not acceptable?– A. Type SJ flexible cord

– B. Type SO flexible cord

– C. Flexible metal conduit

– D. Liquidtight flexible non-metallic conduit


● Question is about wiring methods, flexibility required, in a Class I Division 2 locations

● Index: “Hazardous (classified) locations, Class I” → “Wiring methods, 501.10”

● Scan 501.10 for approved methods → 501.10(B)(2)● For cords, one finds that they have to approved for

extra hard usage● Index: “Cords” → “Flexible” → “Types, Table 400.4”

Question 44

● What is the minimum thickness of the sealing compound in a completed sealing fitting in a Class I location?– A. 3/8”

– B. 1/2”

– C. 5/8”

– D. 3/4”


● Question is about the thickness of sealing compound in Classified (Class I) locations

● Index: “Hazardous (Classified) Locations, Class I” → “Sealing 501.15”

Question 45

● For paint spraying operations confined to an enclosed spray booth which one of the following statements is true?– A. The space within 5' from the front door opening is

classified as a Class I Division 1 location

– B. The space between 5' and 10' from the front door opening is classified as a Class I Division 2 location

– C. The space within 3' of the door opening in all directions is classified as a Class I Division 2 location

– D. The space outside the spray booth is not classified


● The question is about classification of spaces outside of an enclosed spray booth

● Index: “Spray applications, dipping, and coating processes, Art 516” → “Classification of locations, 516.3”

● Scan 516.3 for locations outside of the enclosed spray booth

Question 46

● Which of the following statements about intrinsically safe systems is incorrect?– A. Intrinsically safe apparatus, if of metal, shall be

connected to an equipment grounding conductor complying with Section 250.122

– B. Sealing fittings at boundaries are required to be explosionproof

– C. It must be separated from non-intrinsically safe wiring

– D. It must be separated from other intrinsically safe wiring


● Question is about intrinsically safe equipment and wiring– Index “Intrinsically safe systems”

– Check the following subheadings● → “Conductors, separation 504.30”● → “Grounding and bonding, 504.50”● → “Sealing, 504.70”

Question 47

● In pediatric patient care areas at a hospital, which statement concerning the receptacles is TRUE?– A. Only 15- and 20-ampere receptacles are required to

be listed tamper-resistant or shall employ a listed tamper-resistant cover

– B. All receptacles, regardless of their rating, are required to be listed tamper-resistant or employ a listed tamper-resistant cover

– C. Tamper-resistant receptacles or covers are not required

– D. All receptacles, regardless of their rating, are required to be tamper-proof or employ tamper-proof covers


● Question is about type of receptacles in pediatric locations of a health-care facility– Index: “Receptacles” → “Health care facilities, 517.13,

517.18, 517.19...”

– Scan through the referenced articles to look for “Pediatric Locations” and find which of the requirement above matches

Question 48

● A lubrication pit below floor level at a quick-lube commercial garage without dispensing has continuous exhaust ventilation within 12” of the floor of the pit. What is the classification of the pit?

● Class I Div 1● Class I Div 2● Class I Zone 0● Unclassified


● Question is about classifications in commercial garages (know your types)

● Index: “Commercial garages” pints you back to “Garages, commercial” → “Classifications of locations, 511.3”

● Scan through, comparing the question to determine what kind of garage and extenuating circumstances apply

Question 49

● A Class I location shall include locations containing any of the following atmospheres except:– A. Oxygen

– B. Ammonia

– C. Propane

– D. Hydrogen


● Question is about the classification of hazardous atmospheres in a Class I location

● Index: “Hazardous atmospheres” → “Class I Locations, 500.5(B)” and → “Groups A through G, 500.6”

● Scan through both sections and eliminate the one not shown in the NEC

Question 50

● A Class II, Division 2 location may exist due to the presence of which one of the following conditions?– A. Accumulated combustible dust sufficient to interfere

with the normal operation of the electrical equipment

– B. Combustible dust in suspension in sufficient quantities under normal operation to pose an explosion hazard

– C. Combustible dust normally present and sufficient to produce an ignitable mixture

– D. Combustible dust in suspension in sufficient quantities under abnormal operation to pose an explosion hazard

Question 50 - Method

● Question is about hazardous atmospheres in a Class II Location

● Index: “Hazardous Atmospheres” → “Class II locations, 500.5(C)”

● Look at 500.5(C) and see which of the above fit the Division 2 description

Chapter 6 Pretest


Question 51

● An AC arc welder shall have overcurrent protection at not more than what percentage of the rated primary current if I

MAX is not given?

– A. 100%

– B. 125%

– C. 150%

– D. 200%


● The question is about overcurrent protection of an arc welder

● Index → “Welders, electric” → “Arc, 630-Part II”● Scan 630-Part II and find “630.12 Overcurrent

protection

Question 52

● Which one of the following statements about branch circuits for a sign outlet at a store is NOT correct?– A. Circuits that supply only neon tubing shall not be

rated in excess of 20 amperes

– B. Each commercial occupancy must be provided with a sign outlet at each tenant entrance space

– C. The sign outlet at each commercial occupancy entrance shall be rated at least 20 amperes and serve no other loads

– D. The load for the required sign circuit shall be calculated at a minimum of 1,200VA


● The question is about branch circuits for electric signs

● Index → “Signs” → “Electric, Art 600” → “Branch Circuits, 600.5”

● Scan through the requirements in 600.5 to eliminate all but two possibilities.

● Back to Index → “Loads” → ”Branch Circuits, Calculations, Art 220...”

● Familiarity with Art 220 will lead to specific circuit requirements in 220.14 and locate subsection for signs

Question 53

● What is the minimum allowed horizontal clearance of overhead conductors from a storable pool?– A. NEC does not apply to storable pools

– B. 15 feet

– C. 10 feet

– D. 18 feet


● Question is about working clearances of conductors from pools

● Index: “Swimmimg pools, fountains, similar installations” → Overhead conductor clearances, 680.8”

● Look at 680.8, keeping in mind the difference between vertical and horizontal.

● Verify that the scope applies → 680.1

Question 54

● Which of the following statements about secondary ground-fault protection for transformers for electric signs is true?– A. Secondary-circuit ground-fault protection is required

for all transformers that are installed inside a building

– B. Transformers with isolated ungrounded secondaries and a maximum open circuit voltage are not required to have such protection

– C. Transformers with integral protection and field wiring are not required to have secondary-circuit ground-fault protection

– D. Installations with secondary ground-fault protection may waive the requirement for overcurrent protection for the branch circuit.


● Question is about overcurrent protection of conductors and transformers in a sign– Index: “Signs” → “Electric, Art 600” → “Ballasts,

transformers, and electronic power supplies, 600.21 through 600.24”

– Scan though these sections in Art 600 and look for a heading that covers “Secondary-circuit ground-fault protection”

Question 55

● In data processing information technology rooms, which of the following statements about the disconnect means is NOT true?– A. It must disconnect power to all electronic equipment

– B. The disconnect for the HVAC system for this room shall be located remote from the disconnecting means for the electronic equipment

– C. The control for the disconnecting means for the electronic equipment and HVAC system must be grouped

– D. A single disconnecting means is permitted for both the electronic equipment and the HVAC system


● Question is about the disconnecting means for a data processing room

● Index “Information technology equipment” → “Disconnecting means, 645.4(1), 645(10)”

● Take a look at both sections to determine correct wording

Question 56

● A cord-connected luminaire shall be mounted not less than how many feet above the rim of a hydromassage bathtub?– A. 5'

– B. 6'

– C. 8'

– D. 9'


● Question is about luminaires above specific equipment → bathtub

● Index: “Hydromassage Bathtubs, 680-Par VII”● Scanning that section you will find “680.72, Other

electrical equipment” where it says luminaires shall be installed according to Ch 1 – 4 rules

● Index: “Luminaires” → “Bathtubs, near, 410.10(D)...”

● Scan 410.10(D) and find the vertical clearance requirements

Question 57

● When selecting overload protection for motors in elevators, the driving motors shall be rated

● A. intermittent duty● B. continuous duty● C. short-time duty● D. periodic duty


● Question is about the duty rating of elevator motors● Index: “Elevators, dumbwaiters,...” → “Overcurrent

Protection, 620-III”● Scanning through 620 part III find “Overload

protection” and scan through the details

Question 58

● What is the locked rotor current rating of an irrigation machine rated 480V 3 phase where the machine motors consist of two 10 HP motors (nameplate FLA of 12.0A) and three 5HP motors (nameplate FLA 7.0A)?– A. 41A

– B. 44A

– C. 176A

– D. 234A


● Question is about LRC for an irrigation machine. Knowing a bit about these machines will lead to the conclusion that it probably is not continuously rated.

● Index “Irrigation Machines” → “Current ratings, equivalent, 675.7”

● Browse through 675.7 and look for Locked Rotor rating

Question 59

● Which of these is not an approved wiring method for an underwater audio system in a swimming pool?

● A. Rigid galvanized conduit● B. Rigid brass conduit● C. Rigid aluminum conduit● D. Liquid-tight flexible non-metallic conduit


● Question is about underwater audio system wiring in swimming pools

● Index: “Swimming Pools” → “Underwater Audio Equipment, 680.23”

● Scan through the approved methods

Question 60

● Conductors for electronic signal circuits of a pipe organ shall not be smaller than

● A. 14AWG● B. 18AWG● C. 22AWG● D. 26AWG


● Question is about circuit conductors for a pipe organ

● Index “Pipe Organ” → “See Organ, Pipe” so we do● Index “Organ” → “Pipe” → “Conductors, 650.6”● Follow 650.6 to find minimum size for signal circuits

Chapter 7 Pretest


Question 61

● A lighting circuit that is part of an emergency system must be kept entirely independent of non-emergency wiring in all cases EXCEPT:– A. Where space limitations do not permit separation

– B. In transfer equipment enclosures

– C. Within the same partitions as fire-rated assemblies

– D. Above a suspended ceiling with a 15-minute finish rating


● The question is about maintaining the wiring of an emergency system independent of other wiring

● Index → “Emergency Systems” → “Circuit Wiring, 700-Part II”

● Scan through Part II, find “700.10(B) Wiring” where the prohibition is found unless otherwise permitted in (1) through (5)

Question 62

● Which one of the following statements about Instrumentation Tray cable is NOT true– A. It is permitted to be used in industrial establishments

only where qualified persons will service the installation

– B. It may be installed in raceways

– C. Is is permitted to be used in Class I hazardous locations

– D. It may be used on circuits operating at 300V or less


● Question is about uses of Instrumentation Tray Cable

● Index: “Instrumentation tray cable (Type ITC)” → “Uses not permitted 727.5” and also → “Uses permitted 727.4”

Question 63

● All of the following statements regarding individual unit equipment for emergency illumination are true EXCEPT:– A. The unit may be supplied with flexible cord not

exceeding 3' in length

– B. The circuit feeding the unit shall also feed the normal lighting in the area

– C. The unit shall be permanently fixed in place

– D. The unit may be connected on the load side of the local switches


● Question is about unit equipment used for emergency lighting

● Index: “Emergency Systems” → “Unit equipment, 700.12(F), 700.12(G)”

● Scan through these requirements to see which are correct

Question 64

● Class 2 and class 3 cables listed as suitable for use in a vertical run in a shaft, or from floor to floor are labeled:– A. CL2P and CL3P

– B. CL2R and CL3R

– C. CL2 and CL3

– D. PLCT


● Question is about cables used in limited energy systems

● Index: “Class 1, 2, and 3 circuits, see Remote-control, signaling, and power-limited circuits”

● Index: “Remote-control, signaling, and power-limited circuits” → “Class 2 and Class 3 Circuits, 725-Part III” → “Marking, 725.124, 725.179”

● Scan through these references to find the one suited to the question

Question 65

● A Class 2 power supply operating at 15V may have a maximum rating of– A. 75 VA

– B. 100 VA

– C. 250 VA

– D. 1000 VA


● Question is power limitations in limited energy systems

● Index: “Class 1, 2, and 3 circuits, see Remote-control, signaling, and power-limited circuits”

● Index: “Remote-control, signaling, and power-limited circuits” → “Class 2 and Class 3 Circuits, 725-Part III” → “Power sources, 725.121(A), Chap. 9, Tables 11(A) and (B)”

● Look for power limitations in Table 11(A) based on applied voltage

Question 66

● Non-power limited fire alarm circuits may operate up to – A. 24V

– B. 50V

– C. 300V

– D. 600V


● Question is about the maximum power source voltage for a non-power limited fire alarm circuit.

● Index: “Fire alarm systems” → “Non-Power limited circuits” → “Power source requirements, 760.41”

Question 67

● Where an on-site power source, such as an inverter, is interconnected with the utility supply it shall have all of these but one– A. Identical voltage, wave shape, and frequency as the

utility supply

– B. a readily accessible disconnecting means

– C. Overcurrent protection for all conductors fed by sources of electrical energy

– D. Where backfeed breakers are employed, they shall be suitable for such operation


● The question is about specific characteristics of Interconnected Electrical Systems

● Index: “Interconnected electric power production sources, Art 705”– → “Disconnecting means” → “Sources, 705.20”

– → “Overcurrent protection, 705.30”

– → “Output characteristics, 705.14”

– → “Point of connection, 705.12”

● Carefully look at which wording does not match the requirements

Question 68

● Where a combustion engine is the prime mover for a legally required standby system, the fuel supply must be sufficient for at least– A. 48 hours

– B. 24 hours

– C. 2 hours

– D. 1.5 hours


● The question is about the source of power (specifically amount of fuel) in a legally required standby system

● Index: “Legally required standby systems” → “Sources of power, 705 Part III”

● Scan through this section to find the right energy source, and then look for the fuel supply

Question 69

● Equipment used in Emergency systems must– A. Be listed transfer equipment

– B. Approved for use on emergency systems

– C. Listed for use on emergency systems

– D. Performance tested for use as an emergency system


● The question is about equipment approval in Emergency systems

● Index: “Emergency Systems” → “Equipment approval, 700.3”

Question 70

● Instrumentation Tray Cable sized 16AWG shall be protected at no more than– A. 10A

– B. 7A

– C. 5A

– D. 3A


● Question is about overcurrent protection for ITC cable

● Index: “Instrumentation Tray Cable (Type ITC)” → “Overcurrent protection, 727.9”

Chapter 8 Pretest


Question 71

● If no other grounding method is available at a structure, a communications system's primary protector may grounded using a ground rod at least– A. 5' long and 1/2” diameter

– B. 8' long and 1/2” diameter

– C. 5' long and 5/8” diameter

– D. 8' long and 5/8” diameter


● Question is about primary protector grounding for a communications system

● Index: “Communications Circuits” → “Protection” → “Grounding, 800.100, 800.106(A)”

Question 72

● Listed communications clable must be listed and rated at least– A. 50V

– B. 150V

– C. 300V

– D. 600V


● Question is about the voltage rating of a listed communications cable

● Index: “Communications circuits” where you have no indication of voltage, but both of the following will lead you– → “Listing of communications wires and cables,

800.113, 800.179”

– → “Types of cable, 800.179”

Question 73

● Outdoor antenna and lead-in conductors above ground must be kept at least this distance away from exposed power and light conductors?– A. 1 foot

– B. 2 feet

– C. 3 feet

– D. 6 feet


● The question is about antenna cabling (radio and television) in proximity of line voltage conductors (not cables)

● Index “Antenna systems … see Community antenna television and radio distribution (CATV) systems...” so we do

● Index “ Community antenna television and radio distribution (CATV) systems” and scanning through it you will not find something that points to quite the right place

● Index: “Clearances” → “Antennas, 810.13, 810.18, 810.54”

Question 74

● The grounding conductor for an antenna system, such as a dish receiver, shall not be smaller than this if of copper-clad steel.– A. 6 AWG

– B. 10 AWG

– C. 14 AWG

– D. 17 AWG


● The question is about grounding an antenna● Index: “Grounding” → “Antenna, 810.15, 810.21,

810.58, 810.71(B)”

Question 75

● Coaxial cables run through wood framing must keep at least this distance from non-metallic power and light cables in the same framed walls.– A. None

– B. 2”

– C. 6”

– D. 12”


● The question is about cable clearances of CATV cables from other power and light cables

● Index “ Community antenna television and radio distribution (CATV) systems” → “Installation of cables and equipment, 820 Part V”

● 820 Part V starts with 820.133 and subsection (A) deals with separation. Read carefully

Question 76

● In dwelling units, the protector grounding conductor for network powered broadband communications systems shall be as short as possible and not exceed this length:– A. 5 feet

– B. 6 feet

– C. 10 feet

– D. 20 feet

Question 76 Method

● Question is about grounding of the primary protector in a network powered broadband communications system

● Index: “Network powered broadband communications system” → “Grounding Methods” → “Cable network interface unit, primary protection, 830.100”

Question 77

● Where practicable, network powered broadband communications system conductors shall have a separation of at least this distance from lightning arrest conductors.– A. 6 feet

– B. 10 feet

– C. 12 feet

– D. 16 feet

Question 77 Method

● Question is about cable distance to lightning arrestor down-conductors

● Index: “Network powered broadband communications systems” → “Buildings, 830-II” → “On buildings, 830.44(I)

● You will end up in the right ballpark – scan for lightning protection

Question 78

● Overhead communications cables must have a height not less than this over a swimming pool.– A. 10 feet

– B. 12 feet

– C. 16 feet

– D. 18 feet


● Question is about overhead clearance of communications circuit conductors

● Index: “Communications circuits” → “Conductors” → “Overhead, 800.44”

Question 79

● Communications conductors no longer in use must be– A. Grounded

– B. Bundled

– C. Removed

– D. So marked


● Question is about communications cabling no longer used → abandoned

● Index: “Communications circuits” → “Abandoned cables, 800.25”

Question 80

● Conductors in a conduit nipple need not be derated for– A. Ambient temperature

– B. Conductor insulation properties

– C. Numbers of conductors

– D. Temperature limitations of terminations


● Question is about conductor ampacity adjustments in conduit nipples

● Index “Conduit nipples, Chapter 9, Note 4 to Table 1”

180180

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