Intermatic Inc. ST01C Digital In-Wall Timer Logo
Posted on Dec 08, 2010

Installing replacement for neighbour and cannot get lights to work. Single switch running 6 flood lights(each 60w) with 2 burned out. Have power to switch as can get standard switch to work. This is second one he has replaced since moving in. The original was there when he moved in.

1 Answer

A

Anonymous

If I understand correctly you have standard on-off situation for exterior lights. Load is 360 Watt, well within capacity of all in-wall timers.
You have identified the hot wire.
You have confirmed that load works, and that electricity is ON.
Regular on-off switch works fine.

Now the information is a bit fuzzy.
You are installing a timer to control this load?
You do not identify timer.

So I will jump into the shark waters and ASSUME ...
That your timer has 4 wires?

A) Timer is battery operated Intermatic ST01C or EJ500 with red, blue, black, green.
Red is capped off.
Green goes to ground.
Black goes to hot from breaker.
Blue goes to Load.
Click on-off button, if timer does not operate, reverse blue and black.
If lights click on-off, then you put red wire where blue wire should be

B) Timer does not have battery and is Tork, GE, Intermatic, Woods, Utilitec, Westek and has red, black, white and green wires.
Here's what to do:
Green goes to ground
Two switch wires connect to red and black in any order right now.
In back of electric box are white wires twisted together and covered with wire nut. These are neutral wires. Timer white wire connects to the neutrals. This will power the internal clock motor.
If box does not have neutrals, the timer white wire connects to bare ground along with green wire.
Click manual override button, if lights do not turn on, then reverse red and black wires.

Why does you neighbor's timer not last very long?
I don't know.
If timer has battery and timer exposed to cold temperatures, then battery lasts about a month.
If timer has no battery, you have to send me the model number and let me look into it.
Use a circuit analyzer on receptacle on same breaker and see if anything shows that might interfere with electronics.

Add a comment any time.

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