Arc Flash
Electrically Safe Work Conditions
NFPA/OSHA
Hazards
Maintenance Requirements
100

The unintended electrical discharge or spark that occurs between two or more conductors, or between a conductor and a conductive material.

What is an Arc Fault?

100

They shall establish, document, and implement an ESWC policy.

Who is the employer?

100

This regulatory body enforces general requirements for workplace safety.

What is OSHA?

100

A voltage as low as what, that is applied between two parts of the human body can do this?

What is electric shock?

100

Employees who are trained and familiar with the specific maintenance of equipment or installation, and will be allowed to perform maintenance work on said equipment are considered this?

What is a qualified person?

200

The pressure wave that follows an arc fault.

What is an arc blast?

200

Energized electrical conductors and circuit parts operating at voltages equal to or great than what shall be put into an ESWC.

What is 50 volts?

200

OSHA uses this to issue citations in regards to NFPA 70E.

What is the general duty clause?

200

This is the most common shock-related, nonfatal injury.

What are electrical burns?

200

Electrical equipment has working spaces and clearances needed to work properly and be compliant. Such spaces shall what?

What is be maintained in accordance with electrical codes and standards?

300

The light and heat from the explosion when an arc fault occurs.

What is an arc flash?

300

This is the first priority in the implementation of safety-related work practices.

What is hazard elimination?

300

Chapter 1 of NFPA 70E covers this. 

What are safety related work practices?

300

Currents great than 75 mA can cause this.

What is ventricular fibrillation?

300

Safety equipment, including locks and interlocks, must be kept in what?

What is good working condition?

400

The distance where a worker without appropriate PPE would receive a second-degree burn.

What is the Arc Flash or Restricted Approach Boundary.

400

An ESWC must be established when an employee interacts with equipment where the conductors or circuit parts are not exposed, but what?

What is an increased likelihood of injury from an exposure to an arc flash hazard?

400

This offers detailed guidelines and best practices to help employers comply with OSHA's electrical safety mandates.

What is NFPA 70E?

400

This can cause a person to stop breathing, have muscle spasms, improper heart beating, thermal burns, electrical burns, tissue damage, and more.

What is electrocution?

400

In order to minimize potential equipment failures, electrical equipment must be maintained as given in what?

What is the equipment's manufacturer's instruction?

500

An area where it is still possible to be exposed to a shock hazard, and where non-qualified workers should stay outside of unless wearing proper PPE and being escorted by a qualified worker.

What is the limited approach boundary?

500

New in 2024: A state in which an electrical conductor or circuit part has been disconnected from energized parts, locked/tagged in accordance with established standards, tested for the absence of voltage, and if necessary, temporarily grounded for personnel protection.

What is an Electrically Safe Work Condition?

500

Chapter 2 of NFPA 70E covers this information.

What are Safety related maintenance requirements?

500

This can be ignited from several feet away from an arc flash.

What is clothing?

500

These must be kept in a state that there are no worn, frayed, or damaged areas that could expose workers to an electrical hazard.

What are flexible cords and cables?