FREE E2 Commercial Electrical Inspector Safety Standards and Practices Questions and Answers

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What is the primary purpose of arc flash labeling on electrical equipment?

Correct! Wrong!

NEC Article 110.16 requires arc flash labels on electrical equipment to warn of potential hazards and specify the required personal protective equipment (PPE). This is critical for worker safety.

Which of the following safety clearances is required in front of electrical panels operating at 480 volts?

Correct! Wrong!

NEC Article 110.26(A)(1) specifies a minimum clearance of 36 inches in front of equipment operating at 480 volts to allow safe access for operation and maintenance.

What is the function of a ground-fault circuit interrupter (GFCI)?

Correct! Wrong!

GFCIs protect personnel by quickly disconnecting power if a ground fault (current leakage) occurs, reducing the risk of electric shock. They are mandatory in wet or damp locations per NEC Article 210.8.

During an inspection, you notice a panelboard with exposed live parts. What is the appropriate action?

Correct! Wrong!

Exposed live parts are a significant safety hazard. NEC Article 110.27 requires live parts to be enclosed or guarded to prevent accidental contact.

What is the minimum required PPE when inspecting a live 480-volt panel, assuming no arc flash study has been performed?

Correct! Wrong!

Without a specific arc flash study, default PPE for working near live equipment is based on general hazard levels. For 480 volts, NFPA 70E recommends full arc-rated PPE to protect against potential arc flash hazards.

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