Load calculations

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ggonza

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When doing a load calculation, say for a 120/240 single dwelling home. Do you figure out the amps for all the 120v loads seperately from the 240v loads. Or do you find the total wattage and divide it all by 240 to figure out the service size? thank you
 
ggonza said:
When doing a load calculation, say for a 120/240 single dwelling home. Do you figure out the amps for all the 120v loads seperately from the 240v loads. Or do you find the total wattage and divide it all by 240 to figure out the service size? thank you
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Sum and factor in VA then divide by 240.
 
ggonza said:
When doing a load calculation, say for a 120/240 single dwelling home. Do you figure out the amps for all the 120v loads seperately from the 240v loads. Or do you find the total wattage and divide it all by 240 to figure out the service size? thank you
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Remember that generally speaking all the 120v loads ill be somewhat equally divided between the phases thus you would use the 240V for your calculation.
 
jumper said:
OP is an apprentice, I believe OP is trying to learn in hopes of passing the test one day.
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If I understand you, he should do it the old fashion way with a pencil and paper. I agree.

That is why when you hand the clerk $21.00 for $15.76 due they try to hand back the one dollar bill.
 
yeah it makes more sense. Thanks. And thanks to Dennis, I didn't consider that the 120v loads would be equally divided (hopefully) between the 240v system. And yes I do hope to pass the test someday.
 
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