EWRB (Electrical Engineering) WIRING FINAL
EXAM QUESTIONS AND ANSWERS.
The minimum length and diameter of the rod needed for grounding at the
main service entrance:
a. 4 ft * ½" copper
b. 6 ft * ¾" copper
c. 8 ft * ½" copper
d. 8.5 ft * ½" copper
Verified Answer -d. 8.5 ft * ½" copper
I noted two transformed on the power poles leading into your farm. This
means you must have:
a. Single Phase power only
b. Three phase power Delta
c. Three phase power Wye
d. Three phase power Open Delta
Verified Answer -d. Three phase power Open Delta
An additional wire is NOT needed to provide a grounded conductor when
using ______ in your farm shop:
a. PVC tubing
b. EMT tubing
c. Black pipe
d. Other (write in): ___________________
Verified Answer -b. EMT tubing

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jordancarter 6 months ago

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