When sizing wire, one of the most difficult tasks is to calculate the electrical load that will be present on the conductors. How do you decide what size wire to use? What two factors are important to consider?

What is a chief benefit of using a Class G fuse rated higher than 6 amps in a circuit where high momentary surges are expected but not damaging to equipment being protected by the fuse?

What is a flush plate? Describe where you might find a flush plate in residential circuitry.

Why are you forbidden to use nonmetallic boxes in a metal conduit system, but permitted to use metallic boxes in a nonmetallic conduit system?