Here is the question:
"How many 120V, two wire, 20 ampere branch circuits are required to supply
52 parking lot lights, which are rated 500va each and are continuous loads?"
I am getting ~ 14, but the answer in the book is 18
Can you help?
![]() |
Here is the question:
"How many 120V, two wire, 20 ampere branch circuits are required to supply
52 parking lot lights, which are rated 500va each and are continuous loads?"
I am getting ~ 14, but the answer in the book is 18
Can you help?
Don't you have to derate it ; you get 18Quote:
Originally Posted by paapa94
52 lights at 500 VA=26000 VA / 120 Volts = 216.67 total amps
A 15 amp circuit with a continuous load must be derated 80%, so the max load allowed on a 15 amp circuit is 12 amps.
216 / 12 = 18 circuits
All times are GMT -7. The time now is 12:41 AM. |