Chapter2

Question 1

Fuses for overload protection, may be used in what type of circuit?

Answer 1

Answer : 3 wire, 3 phase, 1 conductor grounded

Question 2

The 2009 MRC requires AFCI protection where?

Answer 2

Answer : ONLY in bedrooms (one and two family dwellings).

Question 3

What is an electrical JOULE?

Answer 3

Answer : 1 watt for a period (time) of 1 second

Question 4

Increasing a circuit’s resistance, will do what?

Answer 4

Answer : circuit current (amperage) will decrease and circuit power will decrease.

Question 5

What is the meaning of “true” or “real” power?

Answer 5

Answer : True or Real circuit power is the actual power of a electrical system - LISTED IN WATTS.

Question 6

What is the meaning of “apparent” power?

Answer 6

Answer : Apparent power is what the power appears to be - LISTED AS: VA or KVA.

Question 7

What motor currents are printed in the NEC: FLA or FLC?

Answer 7

Answer : FLC (Full Load Current) are motor values printed in the Code book.

FLA is a motor’s true operating current, found on the motor’s nameplate.

Question 8

What year version of the NEC, does Michigan currently accept?

Answer 8

Answer : Michigan accepts the 2011 NEC

Question 9

Ferrous (iron - magnetic) enclosures are connected to a non continuous ferrous raceway. Raceways must be bonded to electrical enclosures - HOW?

Answer 9

Answer : Raceways must be electrically bonded through and at each end of a non continuous raceway to the enclosure(s) 250.64(E)

Question 10

Electrons move in which direction?

Answer 10

Answer : Negative (-) to Positive (+)

Question 11

What is a coulomb?

Answer 11

Answer : A quantity (number) of electrons (6.24 x 1018) flowing in 1 ampere of current for a duration of 1 second.

Question 12

A fixed 16.3 ft.: multi receptacle outlet strip, powering showroom display TVs, shall have a calculated load of?

Answer 12

Answer :
Step 1 (round 16.3 ft - up to 17 ft)
Step 2 17 ft x 180VA = 3060VA
See 220.14(H)