Question 1 of 20
Walk me through how you distinguish a feeder from a branch circuit when looking at a one-line diagram.
Strong Interview Answer
A feeder carries power from service equipment or another source to the final branch-circuit overcurrent device. A branch circuit begins on the load side of that final overcurrent device and extends to the outlets or utilization equipment. I identify the conductors by function and by where the final branch-circuit OCPD sits in the power path.
What to Listen For
- feeder
- final branch-circuit OCPD
- branch circuit
- one-line diagram
Caution
Do not define a feeder as simply 'source to load'; identify the final branch-circuit overcurrent device boundary.