Journeyman Electrician Practice Exam #7

A listed instantaneous water heater shall be permittted to be subdivided into circuits protected at NOT more than _______________.

• 60 amps

• 100 amps

• 120 amps

• 150 amps

Individual ungrounded branch-circuit conductors must be separately identified if ____________.

• they are accessible

• they are in the same raceway or enclosure with ungrounded conductors from a different system.

• they are part of a premises wiring system with branch-circuit conductors from a different system

• all of these apply

The continuity of the grounding conductor system for portable electrical carnival equipment shall be verified _____.

• and recorded on an annual basis

• and recorded on a quarterly basis

• and recordedon a monthly basis

• each time the equipment is connected

A plate-type grounding electrode shall be installed below the surface of the earth NOT less than ______________.

• 24 inches

• 30 inches

• 36 inches

• 48 inches

Determine the MAXIMUM allowable ampacity of a size 1/0 AWG, THW, copper, current-carrying conductor installed in a common raceway with three (3) other current-carrying conductors of the same size. Ambient temperature is 86 degrees F.

• 150 amps

• 105 amps

• 112 amps

• 120 amps

The NEC defines a continuous load to be a load where the maximum current on the circuit is expected to continue for __________ hours or more.

• 3

• 4

• 6

• 8

Determine the MINIMUM size THW , copper, branch-circuit conductors required by the NEC to supply a three-phase continuous duty, AC motor that has a full-load current of 70 amperes. Assume all terminations to be rated at 75 degrees C.

• 1 AWG

• 2 AWG

• 3 AWG

• 4 AWG

Given: you have determined a conductor has a computed ampacity of 75 amperes. What is the MAXIMUM standard ampere rating of the overcurrent protection device the nEC permits to protect this circuit? This is not a moter circuit or part fo a multi-outlet branch circuit supplying receptacles.

• 70 amps

• 75 amps

• 80 amps

• 85 amps

A 208 volt, three phase, 50 HP, squirrel-cage, continuous duty, Design C motor has a full-load running current of _________.

• 130 amps

• 143 amps

• 162 amps

• 195 amps

Which of the following metal piping systems contained in a building is/are required to be bonded?

• A gas pipe for a gas heater

• A bathroom water pipe connected to an electrric water heater

• An air line for compressed air

• All of these need to be bonded