Pool pump/time switch wiring question.

Old 06-04-14, 07:41 AM
Thread Starter
Join Date: Nov 2001
Location: CANADA
Posts: 269
Upvotes: 0
Received 0 Upvotes on 0 Posts
Pool pump/time switch wiring question.

I am installing a new Intermatic T104 time switch for my pool pump. (240V)

The wiring from the pool pump to the switch has 3 black wires in an armored cable.. I don't know how to determine which is the ground.

Old 06-04-14, 08:12 AM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 65,100
Received 3,982 Upvotes on 3,574 Posts
I'm assuming the wires are in some type of sealtite flexible conduit. There should be a motor wiring junction cover where the flex and wiring connects.

You can use an ohmmeter to check for the grounded wire. Only the ground wire should show continuity to ground (metal motor frame). The other two should be completely isolated from ground.

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: