Have a question about calculating neutral load for the service. In example D1(a) in Annex D in the section for neutral load calculation dryer is included in the calculation (at 70%). In the description for this example it is stated that dryer is a 240V equipment. Why do we have to include dryer in neutral calculation? I thought that 240V loads do not generate neutral current.
Neutral calculation
- Thread starter ciupol
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winnie
Senior Member
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- Springfield, MA, USA
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- Electric motor research
A true 240V load does not put any load on the neutral. (In a normal residential system, that is.)
But most driers are 120/240V devices. I would expect only a small neutral load for the 120V motor and controls, but perhaps some driers have high 120V loading, say for low temperature operation.
-Jon
But most driers are 120/240V devices. I would expect only a small neutral load for the 120V motor and controls, but perhaps some driers have high 120V loading, say for low temperature operation.
-Jon
Only 240V 1? 3-wire equipment, i.e. 120/240V. Cooking appliances, clothes dryers are the typical residential loads; some HVAC equipment...
No 240V 1? 2-wire equipment.
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