NHIE Electrical Systems 3

Question 1

Which wire color is used for the ungrounded (hot) conductor in standard US residential 120V wiring?

Accepted Answer

Black

Answer

Black is the standard color for the ungrounded (hot) conductor in 120V residential circuits.

Question 2

A home inspector observes a 240V dryer circuit using a 3-wire connection to a newer dryer. What is the issue?

Accepted Answer

Dryers require 4-wire connections in new installations per current NEC

Answer

Current NEC requires 4-wire connections (two hots, neutral, and ground) for new dryer installations to separate the neutral and ground.

Question 3

What is the standard amperage rating for a residential kitchen small appliance circuit?

Accepted Answer

20 amps

Answer

NEC requires at least two 20-amp small appliance circuits for kitchen countertop receptacles.

Question 4

An inspector finds a subpanel in a detached garage where the neutral and ground bars are bonded together. What should be reported?

Accepted Answer

This is a defect; subpanels must have separate neutral and ground bars

Answer

In subpanels, the neutral and ground must be separated; bonding is only done at the main service panel.

Question 5

What type of protection is required for receptacles in a bathroom, within 6 feet of a sink?

Accepted Answer

GFCI protection

Answer

GFCI protection is required for all bathroom receptacles due to the presence of water.

(NHIE) National Home Inspector Examination Practice Test