Licensed Electrical Contractor Licensed Electrical Contractor OSHA Safety Standards Questions and Answers 3

Question 1

Under OSHA 29 CFR 1910.305, what type of wiring method is prohibited in hazardous (classified) locations unless specifically approved for the purpose?

Accepted Answer

Flexible cord

Answer

Rigid metal conduit

Answer

Mineral-insulated cable

Answer

Intermediate metal conduit

Question 2

According to OSHA's permit-required confined space standard, what electrical safety precaution must be taken before an electrician enters a confined space containing energized conductors?

Accepted Answer

All energy sources must be locked out and tagged out, and the atmosphere tested

Answer

The space must be ventilated for at least 30 minutes

Answer

Only a voltage detector is needed before entry

Answer

The electrician must wear a full-body harness connected to a retrieval system

Question 3

What does OSHA require regarding the use of extension cords on construction sites under 29 CFR 1926.405?

Accepted Answer

Extension cords must be of the three-wire type and designed for hard or extra-hard usage

Answer

Extension cords may be used as permanent wiring if rated for the load

Answer

Extension cords are prohibited entirely on construction sites

Answer

Extension cords may only be used indoors

Question 4

Under OSHA 29 CFR 1910.335, when is an employer required to provide and ensure the use of electrical protective equipment such as insulated gloves?

Accepted Answer

Whenever employees are exposed to electrical hazards that have not been deenergized or guarded

Answer

Only when working on systems above 600 volts

Answer

Only during outdoor electrical work

Answer

Only when the employee requests protective equipment

Question 5

According to OSHA, what is the required frequency for inspecting electrical protective equipment such as rubber insulating gloves?

Accepted Answer

Before each use and at regular intervals not exceeding six months

Answer

Annually

Answer

Every two years

Answer

Only after a known electrical contact event

Question 6

What does OSHA 29 CFR 1926.417 require regarding the identification of lockout/tagout devices used on electrical circuits?

Accepted Answer

Each device must identify the individual who applied it

Answer

Devices must be color-coded by voltage level

Answer

Devices must be stamped with the date of manufacture

Answer

Devices only need to display the company name