Originally posted by jrc2905
I have a book, Electricity and Controls for heating, Ventilation, and Air Conditioning, from Delmar Publishing. In the sections that deal with start relays, it shows its motors using common connected to a neutral (page 129) when using 120 v and common connected to L2 when 240V. All my other books use common for the 120V line or L1 when using 240V. This is the reverse of everything I have seen when wiring motors, what is up with this?
120v indeed uses common to neutral. 240 common is L1 or L2 as they reffer common as a constant voltage potential and the other line going to a relay to complete the circuit when called.
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