Load calculations—Art. 220 (part 1)

Refer to the drawing, and give the best answer:

1. In doing a load calculation, assume you have to sum the following loads: 14.75A, 25.49A, and 20.24A. What is the result for the purposes of applying other code rules relative to conductor ampacity, etc?

a. 60.48A
b. 60.5A
c. 61A
d. 60A

2. The drawing shows various types of receptacle outlets. In a residence, how many VA do you need to allow in a general-purpose branch-circuit calculation for an outlet with the device at the bottom?

a. 90VA
b. 180VA
c. 360VA
d. not specified

3. In a store, how many VA do you have to allow for two duplex receptacles installed side-by-side in a two-gang box when you make a branch-circuit load calculation?

a. 90 VA
b. 180VA
c. 360VA
d. not specified

4. In the same store, which of the answers (from Question 3) would be correct for the device at the bottom?

5. Again in the same store, how many triplex receptacles (the top center device) could you put on a 20A branch circuit? Would the same answer apply to single receptacles (as at the right) if they were located in groups of threes in three-gang boxes? That is, could you install the same number of outlets comprised of three single receptacles in three-gang boxes as you could triplex receptacles in single gang boxes?

a. 13, no
b. 13, yes
c. 8, no
d. 8, yes
e. 26, no
f. 26, yes

6. If you place five quadruplex receptacle devices, like the one at the bottom of the drawing, above a 20-ft show window for lighting, how much load does this add to the branch circuit involved? How much load do you need to allow for the feeder?

a. 900VA, 900VA
b. 900VA, 4000VA
c. 1800VA, 1800VA
d. 1800VA, 4000VA