I was replacing the timer on my pool pump. I went out and bought a new timer
and am ready to rewire. However, I notice that I have black wire with 4
wires inside coming from the house, but I have white wire with only the
conventional 2 wires and the bare ground going from the switch to the pool
pump. Is this right. They are using the white and black as the 2 (110)wires
coming out of the switch to the pump. Shouldn't I have the same type of 4
wire going from the switch as there is coming to the switch. Any advice
appreciated from electrical people. Thanks
You have a cable or conduit with four wires coming from the house, and a
cable or conduit with two wires and ground going to the pump.
The wires going to the pump are fine, two hot legs and ground. You need to
look at the existing timer wires and see how they are connected, and
identify them. With four wires from the house, it's possible that one of
them isn't being used. It's also possible you have two hot legs for the 240
volt and a neutral and ground. The motor of the old time clock could be 120
volt not 240 volt, which would require the neutral.
Before you take anything apart observe how the existing wiring is connected.
Maybe you should make a diagram. I am guessing that the black cable is
carrying 220 volts, a neutral, and a grounding conductor. The neutral may
be used for the pump timer only. The pool pump is probably 220 volts. The
grounding conductors should be connected together. You can open up the
electrical panel to confirm this.
It sounds like the pump is connected with UF cable, that is wrong.
680.22 requires an insulated ground. The right way to fix this is to
use a raceway (could be flexible non metalic) with insulated
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.