Licensed Electrical Contractor FREE Licensed Electrical Contractor Safety and OSHA Regulations Questions and Answers 3

Question 1

What is the OSHA-required frequency for inspecting portable electrical equipment on construction sites?

Accepted Answer

Before each use

Answer

OSHA 29 CFR 1926.404(b)(1) requires that portable electrical equipment be visually inspected before each use to identify defects and damage.

Question 2

Under OSHA standards, what type of GFCI protection is required for temporary wiring on construction sites?

Accepted Answer

All 120V, single-phase, 15 and 20 ampere receptacles must have GFCI protection

Answer

OSHA 29 CFR 1926.405(a)(2)(ii) requires GFCI protection on all 120V, single-phase, 15 and 20 ampere receptacle outlets on construction sites that are not part of the permanent wiring.

Question 3

What is the maximum allowable ground-fault current leakage for a Class A GFCI device?

Accepted Answer

5 milliamps

Answer

A Class A GFCI is designed to trip when ground-fault current exceeds 5 milliamps, providing personnel protection against electrocution.

Question 4

According to OSHA, which of the following is a requirement for electrical safety training of employees?

Accepted Answer

Training must be provided for employees who face a risk of electrical shock not reduced to a safe level by installation requirements

Answer

OSHA 29 CFR 1910.332 requires safety training for employees whose job assignments involve a risk of electric shock that is not reduced to a safe level by applicable electrical installation requirements.

Question 5

What is the OSHA requirement for marking the disconnecting means for electrical service equipment?

Accepted Answer

It must be legibly marked to indicate its purpose unless the purpose is evident

Answer

OSHA and the NEC require that each disconnecting means be legibly marked to indicate its purpose unless located and arranged so the purpose is evident.

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Licensed Electrical Contractor FREE Licensed Electrical Contractor Safety and OSHA Regulations Questions and Answers 3