Question about Intermatic INC ET104C 24 HOUR ELECTRONIC TIME SWITCH 30 amp
Fixya answers questions about other people's products.
I specialize in timers.
Intermatic is changing their product line
I suggest you download the manual:
The manual is generic across all the ET100 series products.
The manual does not describe individual models.
The instructions are on the timer door.
Look for the clock voltage.
The clock voltage tells the story of your timer model.
NOW lets say your clock voltage is 120V.
I believe you suspect the clock voltage is 120V.
To make this timer work with your 240V cable, there are 2 methods
Method 1) To meet code, run a white wire from nearby 120V receptacle.
This is a Neutral wire.
Connect the Neutral to terminal 1
Connect one leg from the 240V cable (1 of the 240V wires) to terminal 2 and that will complete the 120V circuit and the clock will run.
This is true because each leg of a 240V circuit is actually 120V, and only when the two legs are combined do they produce the 240V circuit
Method 2) Connect bare ground wire to terminal 1 and to grounding screw
The bare wire connects to the Neutral busbar in the main breaker box, so it will complete the 120V circuit just as described above.
This is not code, but your clock will operate.
Then connect one leg from the 240V cable to the terminal 2
IF your clock is 240 V, then connect both legs of the 240V cable to terminals 1 and 2
7:59 CST Add a comment if you need more assistance, I will be here later this evening
Posted on Nov 06, 2010
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Posted on Jan 02, 2017
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