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Arc Flash Risk Assessment

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Questions and Answers

What is the primary purpose of performing an arc flash risk assessment?

To identify arc flash hazards (correct)

To assess the design of electrical equipment

To establish the arc flash boundary

To determine the operating condition of electrical equipment

What should be considered when estimating the likelihood and severity of injury or damage to health in an arc flash risk assessment?

The type of PPE available for use

The ambient temperature in the vicinity of the electrical equipment

The design of the electrical equipment and its operating time (correct)

The number of personnel working in the area

What should be determined when additional protective measures are required, including the use of PPE?

Appropriate safety-related work practices (correct)

The color of the warning labels on the electrical equipment

The material of construction for the electrical equipment

The distance from the electrical equipment

According to the informational note, in what situations do closed doors typically not provide enough protection to eliminate the need for PPE?

When the state of the equipment is known to readily change (B) Signup and view all the answers

Which method shall be used for the selection of arc flash PPE?

Both methods shall be used on the same piece of equipment (B) Signup and view all the answers

What is the distance at which the arc flash boundary shall be determined?

Both a and b (B) Signup and view all the answers

What shall be used by the employee based on the incident energy exposure associated with the specific task?

Both arc-rated clothing and other PPE (A) Signup and view all the answers

How often should the incident energy analysis be reviewed for accuracy?

At intervals not to exceed 5 years (D) Signup and view all the answers

What is used as the basis for the incident energy exposure level?

Working distance of the employee’s face and chest areas from a prospective arc source (B) Signup and view all the answers

When can the arc flash boundary be determined by Table 130.7(C)(15)(a) or Table 130.7(C)(15)(b)?

When there are specific requirements for using these tables (C) Signup and view all the answers

What is not permitted regarding the results of an incident energy analysis for specifying an arc flash PPE category?

Specifying an arc flash PPE category in Table 130.7(C)(15)(c) (B) Signup and view all the answers

What should be used for any parts of the body that are closer than the working distance at which the incident energy was determined?

Additional PPE based on the incident energy exposure (B) Signup and view all the answers