Motor wiring - L1 & L2, 115v.

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Motor wiring - L1 & L2, 115v.

Postby cdbma » Wed May 15, 2013 6:37 am

I'm wiring a new pump (USQ1072) for 115v operation The old pump's diagram (115v) has Line on L2. New pump's diagram suggests Line on L1 (Note: the text "Neutral Line" confuses me). I understand that it really doesn't make a difference, as long as my Line (in) is the side that is switched (which is is), so the motor is not left "hot" when I toggle the remote on/off switch. However, I've read that it's best to have Line on the side of the motor that "breaks" when the thermal overload kicks in, and motors typically break the hot side. I've also read that it's not a real problem if the thermal overload breaks the neutral, as the motor is essentially sealed and grounded, and this is not a real safety issue.

However, I want to do this right. I've enclosed photos of the two motors' wiring diagrams. I am certain that Line (black wire) was connected to L2 on the old motor, as the diagram suggests.

Do I move Line to L1 on the new motor?

Thank you.
USQ1072.jpg (193.94 KiB) Viewed 31417 times
U27-869.jpg (229.59 KiB) Viewed 31417 times
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Joined: Wed May 15, 2013 6:15 am

Re: Motor wiring - L1 & L2, 115v.

Postby dlamp67 » Tue May 21, 2013 10:00 am

You want your "hot" wire on L1 and Neutral on L2 when wiring the new motor. Make sure you operate the voltage selector dial to reflect 115 volts instead of 230 volts.
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