AEP Installation Techniques 2

Question 1

When installing underground cable in a trench, what is the minimum burial depth required for cables operating at 600V or less in a residential area per the NEC?

Accepted Answer

24 inches

Answer

NEC Table 300.5 requires a minimum burial depth of 24 inches for cables rated 600V or less in residential branch circuit runs.

Question 2

What is the primary purpose of using a pulling lubricant when installing conductors in conduit?

Accepted Answer

To reduce friction and prevent damage to conductor insulation

Answer

Pulling lubricant reduces friction between the conductor insulation and conduit walls, preventing insulation damage during installation.

Question 3

When mounting a transformer on a utility pole, which direction should the primary bushings typically face?

Accepted Answer

Away from the roadway for safety

Answer

Transformer primary bushings are oriented away from roadways to protect personnel from accidental contact and reduce vandalism risk.

Question 4

What tool is used to crimp compression connectors onto aluminum conductors during overhead line installation?

Accepted Answer

Hydraulic press crimper

Answer

A hydraulic press crimper applies consistent, high compression force to properly bond compression connectors to aluminum conductors.

Question 5

When installing a new service entrance, where must the service entrance conductors be spliced or connected?

Accepted Answer

They must not be spliced between the service head and the main disconnect

Answer

NEC 230.46 prohibits splicing service entrance conductors between the service head and the service disconnect except where splicing devices listed for that purpose are used.

(AEP) American Electric Power Practice Test

(AEP) American Electric Power Practice Test

AEP Installation Techniques 2