Practice test

Texas Journeyman Electrician Practice Test

Free Texas journeyman electrician practice test with 20 NEC-based questions. Open-book prep covering grounding, load calculations, and wiring methods.

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These questions are for study practice only and are not official exam questions.

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Question 1

1

A metal water pipe enters a building and is used as a grounding electrode. The pipe must be supplemented with an additional electrode when a water meter or other isolating fitting is located within what distance of the point of entry into the building?

Question 2

2

Six 12 AWG THHN current-carrying conductors are run in a single EMT conduit at an ambient temperature of 40 degrees C. Using NEC Table 310.16 (90 degrees C column base ampacity of 30 A), the 40 degrees C temperature correction factor of 0.91, and the 6-conductor adjustment factor of 0.70, what is the corrected ampacity?

Question 3

3

Structural steel that is grounded and interconnected to form a metal building frame may serve as a grounding electrode. What minimum length of steel must be in direct contact with the earth to qualify under NEC 250.52(A)(2)?

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