EWRB (Electrical Engineering) WIRING FINAL EXAM QUESTIONS AND ANSWERS.

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