Site Planning and Layout In the design phase of a facility, fire protection

requirements are considered in the site layout Water supply, traffic and transportation

conditions, fire department access, and building exposures

Water Supply and Use Building designer should anticipate the needs of both the

fire department and automatic extinguishing systems Provide an adequate supply of water at an adequate

residual pressure.  Cities may not be able to supply a sufficient amount of

water at required pressures to every part of the city May need to be boosted by pumps located on fire

department apparatus or the buildings Water pressure for high rise buildings 

Traffic and Transportation Time Traffic conditions Access to buildings Fire Department Access Exterior accessibility - fire department apparatus from all

sides

Exposure From Other Buildings External fire hazards to neighboring structures Radiation and convection  Factors Influencing Severity of Exposure

Temperature and duration Exposing Fire

Type of construction of exterior walls and roofs Width of exposing fire Height of exposing fire Percent of openings in exposing wall area

Exposed Building Type of construction of exterior walls and roofs Orientation and surface area of exposed exterior walls Percent of openings in exterior wall area Protection of openings

Exposure Protection Reference on Exposure Protection:

NFPA 80A, Recommended Practice for Protection of Buildings from Exterior Fire Exposures

Building Electrical Systems As part of the building design, consideration

must be taken with regards to electrical systems and equipment

Number of structure fires per year due to electrical equipment:

Electrical Distribution Equipment: 40,350 Appliance or Tool: 11,110 Heating Equipment: 5,830 Cooking Equipment: 5,210 Air-Conditioning or Refrigeration Equipment: 3,890

Sources for Fires Human Errors That Contribute to Fires Lack of Maintenance Improper Use Carelessness or Oversight Electrical Arcing Electrical Heating

Electrical Safeguards Grounding Guarding Over current Protection Ground Fault Circuit Interrupters

NEC Hazard Classifications Class I: Flammable Gases & Vapors

Division 1 Division 2

Class II: Combustible Dusts Division 1 Division 2

Class III: Ignitable Fibers Division 1 Division 2

Hazard Classifications How are the hazard classifications used in industry? How do “explosion proof wiring and electrical components

work? How would I select electrical equipment that is planned for

use in a hazardous location?

Codes and Standards NFPA 70: National Electrical Code OSHA Standards State and local electrical safety/building

codes Chicago Electrical Code Alaska Electrical Code

ANSI/IEEE: National Electrical Safety Code U.S. electrical industry and communications utility

field

National Electrical Code Format Chapter 1 General

Article 100 — Definitions Article 110 — Requirements

for Electrical Installations Chapter 2 Wiring and

Protection Articles 200 – 299

Chapter 3 Wiring Methods Articles 300 – 399

Chapter 4 Equipment for General Use Articles 400 – 499

Chapter 5 Special Occupancies Articles 500 – 599

Chapter 6 Special Equipment Articles 600 – 699

Chapter 7 Special Conditions Articles 700 – 799

Chapter 8 Communications Systems Articles 800 – 899

Chapter 9 Tables

OSHA Electrical Safety Standards 1910 Subpart S:

Electrical 1910.301 -

Introduction. 1910.302 - Electric

utilization systems. 1910.303 - General. 1910.304 - Wiring

design and protection. 1910.305 - Wiring

methods, components, and equipment for general use.

1910.306 - Specific purpose equipment and installations.

1910.307 - Hazardous (classified) locations.

1910.308 - Special systems.

1910.399 - Definitions applicable to this subpart.

Subpart S Appendix A - Reference Documents

OSHA Electrical Standards 1910.302(a) Scope

OSHA standards under Subpart S cover electrical installations and utilization equipment installed or used within or on buildings, structures, and other premises, including: Yards; Carnivals; Parking and other lots; Mobile homes; Recreational vehicles; Industrial substations; Conductors that connect the installations to a supply of

electricity; and Other outside conductors on the premises.

OSHA Electrical Standards 1910.302(b) Extent of application

Certain standards apply to certain applications based upon when they were designed and/or installed