bbrowntd
New member
- Location
- Houston, Tx
The Minimum neutral demand on an apartment service for eleven-8 kw ranges would be?
The Minimum neutral demand on an apartment service for eleven-8 kw ranges would be?
You tell us. and tell us how you came up with the answer.
Suppose it is a 3 phase 4 wire supply. Out of 11 nos 8kW ranges, assume 9 nos are equally distributed, 3 nos in parallel in each phase. If the remaining two are also in parallel in any one phase, the neutral current is equal to 2 times the 8kW range rated current. But if the remaining 2 nos are one in each of any two phases. the current in the neutral equal to the 8kW range rated current.
So shall we take the 8kW range rated current as the minimum neutral demand?
Isn't the neutral current for the ranges 0? The overall apartment neutral current would be determined by facts not in evidence.
By nos, I meant numbers. Delete nos if it causes any confusion.What does "nos" mean?
That fails to make what you are trying to communicate any clearer.By nos, I meant numbers. Delete nos if it causes any confusion.
Isn't the neutral current for the ranges 0? The overall apartment neutral current would be determined by facts not in evidence.
Even if a range has 0 neutral current, still have to size the neutral conductor to not less than 70 percent ampacity of the circuit rating. 220.61(B)(1) also permits 70 percent factoring for service and feeder neutral load.Isn't the neutral current for the ranges 0? The overall apartment neutral current would be determined by facts not in evidence.