NFPA 70E®–2015

Electrical SafetyStandard for Electrical Safety in the Workplace® 2015 Edition

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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

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• Recognizing the hazards:– Exposure– Electrical hazard – Arc Flash hazard

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• 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

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• It is the Employer’s Responsibility to Provide:– Safe work – Equipment – Safe work – Environment – Safe work Practices

• Documentation• Training

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• 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

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Safe Electrical Work Practices Shall be Used

• Avoid– Shortcuts– Cord and Plug– Failure to de-energize– Unsafe tools– Horseplay

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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

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90.3 Arrangement Chapter 2 applies to safety-related

maintenance requirements for electrical equipment and installations in workplaces

Informative Annex F, Risk Assessment Procedure

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Chapter 1

Safety-Related Work Practices

Article 100 Definitions

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Definitions New definitions

• Hazard• Hazardous• Risk• Risk assessment

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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.

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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

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Chapter 1 Safety-Related Work Practices

Article 110 General

Requirements for Electrical Safety-

Related Work Practices

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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.

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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

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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

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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

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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.

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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

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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

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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.

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Chapter 1 Safety-Related Work Practices

Article 120 Establishing an Electrically Safe Work Condition

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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

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Chapter 1 Safety-Related Work Practices

Article 130 Work Involving

Electrical Hazards

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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

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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

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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

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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

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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)

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130.5 Arc Flash Risk AssessmentDocumentation Documentation required on all arc flash risk

assessment.

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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)

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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)

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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.

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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)

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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

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Chapter 3

Safety Requirements for Special Equipment

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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

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Informative Annexes

A – P

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R. Scott Young

Industrial Safety InstituteWWW.IndustrialSafetyInstitute.com

Ph 813.732.6445Email: Rsyisi@gmail.com

Questions?