NFPA 70E®–2015
Electrical SafetyStandard for Electrical Safety in the Workplace® 2015 Edition
1
Presented by: R Scott YoungIndustrial Safety Institute
Topics covered today• Safety related work practices• Arc flash analysis and the Tables• Shock protection boundaries• Arc Flash Boundaries• Hazard risk categories • Appendix• Energized work permit
2
• Recognizing the hazards:– Exposure– Electrical hazard – Arc Flash hazard
3
4
7
• A Safe Work Area requires focus on the three most common factors for electrical accidents. According to OSHA these include:– Equipment – Environment – Employee Work Practices
8
• It is the Employer’s Responsibility to Provide:– Safe work – Equipment – Safe work – Environment – Safe work Practices
• Documentation• Training
9
• It is the Employee’s responsibility to:– Use the Equipment Provided– Pay attention to the Environment– Use the Safe Work Practices (procedures)
Provided by the Employer
10
Safe Electrical Work Practices Shall be Used
• Avoid– Shortcuts– Cord and Plug– Failure to de-energize– Unsafe tools– Horseplay
11
90.2 Scope Covered. The standard addresses
electrical safety related work practices safety-related maintenance requirements, and other administrative controls • Covered (examples)
• Public and Private Premises (commercial & industrial)• Installations• Electric utilities for ALL facilities other than
communications, metering, generation, control, transformation, transmission, or distribution
Informational Note
12
90.3 Arrangement Chapter 2 applies to safety-related
maintenance requirements for electrical equipment and installations in workplaces
Informative Annex F, Risk Assessment Procedure
13
Chapter 1
Safety-Related Work Practices
Article 100 Definitions
14
Definitions New definitions
• Hazard• Hazardous• Risk• Risk assessment
15
Definitions • Boundary, Arc Flash
• Calculated for 2nd degree burn–1.2 cal/cm2
Boundary, Limited Approach. An approach limit at a distance from an exposed energized electrical conductor or circuit part within which a shock hazard exists.
16
Definitions Boundary, Restricted Approach.
An approach limit at a distance from an exposed energized electrical conductor or circuit part within which there is likelihood of electric shock, due to electrical arc-over combined with inadvertent movement, for personnel working in close proximity to the energized electrical conductor or circuit part.
Note: Prohibited Approach has been removed
17
Chapter 1 Safety-Related Work Practices
Article 110 General
Requirements for Electrical Safety-
Related Work Practices
18
110.1 Electrical Safety Program. General. Employer shall
document an overall electrical safety program appropriate to the risk associated with electrical hazards.
implemented as part of the electrical safety and health program
Maintenance. The electrical safety program shall include elements that consider condition of maintenance of electrical equipment and systems.
19
110.1 Electrical Safety Program. Awareness and Self-Discipline. The
electrical safety program shall provide an awareness of the potential
electrical hazards provide the required self discipline for
all employees Instill safety principles and controls
20
110.1 Electrical Safety Program. Electrical Safety Program
Procedures. An electrical safety program shall identify the procedures to be utilized before work is started by employees exposed to an electrical hazard
21
110.1 Electrical Safety Program. Risk Assessment Procedure. An
electrical safety program shall include a risk assessment procedure that addresses
employee exposure to electrical hazards. shall identify the process to be used by the
employee before work is started to carry out the following: Identify hazards, Assess risks, Implement risk
control according to a hierarchy of methods
22
110.1 Electrical Safety Program. Job Briefing. Before starting each job Briefing shall cover
hazards associated with the job work procedures involved special precautions energy source controls PPE requirements the information on the energized electrical work permit,
if required Additional job briefings shall be held if changes occur
during the course of the work.
23
110.2 Training Requirements Type of Training
On the Job / Classroom or both Emergency Response training
Contact Release First Aid, Emergency response and
Resuscitation Trained in First Aid, Cardiopulmonary
Resuscitation(CPR), Automatic External Defibrillator (AED)
Annual employer certification and documentation of training required
24
110.2 Training Requirements Employee Training.
Qualified Person (cont.) Skills to: Make decisions for job planning and personal
protective equipment (PPE) Perform the job safety planning, Identify electrical
hazards, Assess the associated rise Select the appropriate risk control methods from the
hierarchy of controls identified in 110.1(G), including personal protective equipment
25
110.2 Training Requirements Unqualified Person trained for their safety Retraining
Retraining in safety-related work practices and applicable changes in this standard shall be performed at intervals not to exceed three years.
26
Chapter 1 Safety-Related Work Practices
Article 120 Establishing an Electrically Safe Work Condition
27
120.2 – Application of Lockout/TagoutPrinciples of Lockout/Tagout ExecutionRetraining Retraining shall be performed:When procedures are revisedAt intervals not to exceed 3 yearsTraining Documentation.Employer shall document employee trainingshall be made when employee demonstrates proficiencyshall contain the content of the training, employee’s name, dates of training
28
Chapter 1 Safety-Related Work Practices
Article 130 Work Involving
Electrical Hazards
29
130.2 Electrically Safe Working ConditionsEnergized Work
Normal Operations Shall be permitted where all of the following conditions are
satisfied the equipment is properly installed is properly maintained doors are closed and secured All equipment covers are in place and secured no evidence of impending failure
30
130.2 Electrically Safe Working Conditions
Energized Electrical Work Permit Energized electrical work permit shall be required in
accordance with 130.2(A), under the following conditions:
Work performed within the restricted approach boundary Employee working near equipment not exposed but an
increased likelihood of injury from arc flash hazard exists
31
130.3 Working While Exposed to Electrical Hazards
GeneralSafety-related work practices shall – be used to safeguard employees electrical
conductors and circuit parts– be determined before exposure to shock or arc
flash hazard (using risk assessment) – ONLY qualified persons permitted to work on
energized electrical conductors and circuit parts – put in electrically safe work condition
32
130.4 Approach Boundaries to Electrical Circuit parts or Conductors for Shock Protection
Shock Risk Assessment.A shock risk assessment shall be used to determine the voltage to which personnel will be exposedBoundary requirementsNecessary PPE
33
130.4 Approach Boundaries to Electrical Circuit parts or Conductors for Shock Protection
Shock Protection Boundaries
Limited Approach Boundary Unless permitted by 130.4(C)(3)
Restricted Approach Boundary
Tables 130.4(D)(a) & (b)
34
130.5 Arc Flash Risk AssessmentDocumentation Documentation required on all arc flash risk
assessment.
35
130.5 Arc Flash Risk AssessmentArc Flash PPE
– One of the following methods shall be used, either but not both:• Incident Energy Analysis Method
• Engineering calculations (Annex D)
• Arc Flash PPE Category Method
– Table 130.7(C)(15)
– Table 130.7(C)(16)
36
130.7 Personal and Other Protective Equipment
Personal Protective Equipment (PPE)
Selection of Personal Protective Equipment When Required for Various Tasks Incident energy analysis required by 130.5(C)
(1) (AC equipment) When selected in lieu of the
incident energy analysis of 130.5(C)(1), Table 130.7(C)(15)(A)(a) shall be used When arc flash PPE is required, Table 130.7(C)(15)(A)(b) shall be used to determine the arc flash PPE category
See Informational Notes. (DC equipment) 37
An incident energy analysis shall be required in accordance with 130.5 for the following:
•Tasks not listed in Table 130.7(C)(15)(A)(a)•Power systems with greater than the estimated maximum available short-circuit current•Power systems with longer than the maximum fault
clearing times•Tasks with less than the minimum working distance
130.7 Personal and Other Protective EquipmentPersonal Protective Equipment (PPE)
38
39
40
130.7 Personal and Other Protective Equipment
Personal Protective Equipment (PPE)Arc flash PPE category identified from Table 130.7(C)
(15)(A)(b) or Table 130.7(C)(15)(B), Table 130.7(C)(16) used to determine the required
PPE for the task. Table 130.7(C)(16) lists PPE based on arc flash PPE
categories 1 through 4.
41
42
130.7 Personal and Other Protective Equipment
Alerting Techniques1) Safety Signs and Tags
Per ANSI Z5352) Barricades –if arc flash boundary > limited
approach, shall not be put closer than Arc flash boundary
3) Attendants4) Look-Alike Equipment
Standards for Other Protective Equipment– See Table 130.7(F)
43
Personal Protective Equipment Category specific
Arc-Rated Clothing ARC 1 – minimum 4 cal/cm2
ARC 2 – minimum 8 cal/cm2
ARC 3 – minimum 25 cal/cm2
ARC 4 – minimum 40 cal/cm2
44
Chapter 3
Safety Requirements for Special Equipment
45
Batteries and Battery Rooms• Scope
– Practical safeguarding of employees– Batteries that exceed 50 volts, nominal
• Definitions specific to article• Safety procedures
– General safety hazards– Battery risk Assessment
– Electrolyte Hazards– Cell Flame Arresters & Cell Ventilation
46
Informative Annexes
A – P
47
R. Scott Young
Industrial Safety InstituteWWW.IndustrialSafetyInstitute.com
Ph 813.732.6445Email: [email protected]
Questions?