CEA Safety Standards & Regulations 4

Question 1

What NEC requirement applies to electrical panels installed in clothes closets?

Accepted Answer

Panels are not permitted in clothes closets

Answer

NEC 240.24(D) prohibits overcurrent devices (and therefore panels) from being located in the vicinity of easily ignitable material, which includes clothes closets.

Question 2

Under OSHA 1926 Subpart K, which action is required when working within 10 feet of overhead power lines rated over 50kV?

Accepted Answer

Have the lines de-energized or maintain increased clearance per line voltage

Answer

OSHA 1926.1408 requires that for voltages over 50kV, clearance distances increase beyond 10 feet, and work may only proceed if lines are de-energized or proper clearance is maintained.

Question 3

What is the voltage threshold above which OSHA requires electrical equipment to be guarded against accidental contact?

Accepted Answer

50 volts

Answer

OSHA 1910.303(g) requires guarding of live parts operating at 50 volts or more to prevent accidental contact.

Question 4

Which type of fire extinguisher is rated for use on electrical equipment fires?

Accepted Answer

Class C

Answer

Class C extinguishers use non-conductive agents (CO2 or dry chemical) rated for energized electrical equipment fires.

Question 5

An apprentice notices a coworker bypassing a GFCI on a construction site. What is the correct action?

Accepted Answer

Report it to the supervisor or safety officer immediately

Answer

Bypassing required GFCI protection violates OSHA 1926.404(b)(1) and must be reported immediately to prevent electrocution hazards.

(CEA) Certified Electrical Apprentice Practice Test

(CEA) Certified Electrical Apprentice Practice Test

CEA Safety Standards & Regulations 4