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    Neutral calculation

    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.

    #2
    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

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      #3
      Thanks for the answer.
      One additional question though. So how can one know which loads should be included in neutral calculation? Should I always include all loads, even those marked 240V in the calculation?

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        #4
        Originally posted by ciupol View Post
        Thanks for the answer.
        One additional question though. So how can one know which loads should be included in neutral calculation? Should I always include all loads, even those marked 240V in the calculation?
        I will have achieved my life's goal if I die with a smile on my face.

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