EETC Wiring & Installation Techniques 4

Question 1

When installing a subpanel in a detached garage, the grounding electrode conductor must be connected to:

Accepted Answer

A grounding electrode at the detached structure

Answer

NEC 250.32 requires a separate grounding electrode system at each detached structure supplied by a feeder or branch circuit.

Question 2

What is the maximum number of quarter-bends (90° bends) allowed in a single conduit run between pull points?

Accepted Answer

4 bends (360° total)

Answer

NEC 358.26 (and other conduit articles) limit the total bends between pull points to 360 degrees (equivalent to four 90° bends) to allow conductor pulling.

Question 3

When splicing conductors in a junction box, what is required for all splices?

Accepted Answer

Wire nuts approved for the wire gauge

Answer

NEC 110.14 requires splices to be made with listed devices (such as wire nuts rated for the conductor sizes) and must be accessible.

Question 4

A 240V, 30-amp dryer circuit requires conductors sized at minimum:

Accepted Answer

10 AWG

Answer

A 30-amp circuit requires 10 AWG copper conductors, as 12 AWG is only rated for 20 amps.

Question 5

When installing recessed lighting in an insulated ceiling, the fixture must be:

Accepted Answer

Rated IC (Insulation Contact)

Answer

NEC 410.116 requires recessed fixtures installed where insulation will contact them to be marked 'IC' (Insulation Contact) rated.

(EETC) Electrical Technician Certification Practice Test

(EETC) Electrical Technician Certification Practice Test

EETC Wiring & Installation Techniques 4