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GordonThree's avatar
GordonThree
Explorer
Jul 31, 2016

Upgrade water pump wiring?

Has anyone measured the voltage at their water pump while it's operating?

I'm seeing ~6 amp load and about 10 volts with the pump running wide open (multiple taps opened.)

Battery voltage is at 13.2, as provided by my temperature compensating charger (ambient = 80F)

A 3 volt drop seems high to me. Wiring to the pump is 14 gauge.

Thinking of putting in a dedicated 12 gauge run to the main fuse panel. No idea how many branches the wiring Elkhart put in has, or how many staples they put through it.

USCG / ABYC says max 10pct drop, but their charts show 14 gauge wiring is enough. Does RVIA have a similar standard. Do SAE standards apply, since an rv is considered automotive?

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