Feeder neutral load

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jmart

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Oklahoma
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Electrician
I'm studying for my journeyman test and there is a question I cannot figure out from youtube or online if someone has the time to explain how to solve. The question is as follows:
The lighting load for an assembly hall with an area of 2000 sq.ft. is served with a 120/240 volt, single phase panel and no other electrical loads are served from this panel. The lighting load is continous and the load is balanced and at the minimum required for the load as specified by NEC. Calculate the feeder neutral load in amperes.
 
Sounds to me like sort of a trick question. It says 120/240V, all lights, loads balanced. That, to me, says the neutral current would be 0!
With no other info given, such as xx loads on leg A and xx loads on other leg, also no total current listed, the answer has to be 0 current if the loads are truly balanced.
 
The calculated neutral load would be the maximum possible imbalance; in this case, half of the total load.
 
The are looking at the 1 va per square foot load from Table 220.12 and the rule in 220.61(A) for the neutral load. The total load will be 2000 va. Since the question says the load is balanced, you will include half of the total lighting load in you feeder neutral calculation.
 
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