Arc Flash Boundaries Reference

VoltageLimited ApproachRestricted Approach
Less than 50VNot SpecifiedNot Specified
50-300V3 ft 6 in.Avoid Contact
301-750V3 ft 6 in.1 ft 0 in.
751V-1kV10 ft 0 in.2 ft 2 in.

Arc Flash PPE Reference

Voltage (phase to phase)CategoryRequired PPE
Less than 240 VoltsCAT ILong sleeve shirt, or coat and pants/coveralls. Wrap-around face shield or a comparable arc flash suit hood. Arc-rated jackets, rainwear and hard hat
241 to 600 VoltsCAT IILong sleeve shirt, or coat and pants/coveralls. Wrap-around face shield or a comparable arc flash suit hood and sock hood/balaclava. Arc-rated jackets, rainwear and hard hat. Protective eyewear, gloves, hearing protection and leather shoes/boots.

Work Information

1) Identified Hazards

Exposed energized conductors
Equipment not properly grounded
Damaged insulation
Wet conditions
Working on energized equipment
Opening/closing disconnects
Testing energized circuits
Working inside energized panels

2) Risk Assessment

Assessed Safe Plan of Action from all parties? Yes No
Is it safe to proceed? Yes No

3) Implement Controls

Shock & Arc Flash Risk Boundaries set? Yes No

4) Implementation

Implementation of Controls Successful? Yes No

Note: For systems 600V or less, Flash Protection Boundary is minimum 4 feet. Engineering analysis required for systems above 600V.

Certification