Question about Intermatic T104M 208-277Volt 40-amp Timer Switch-Double Pole / Single Throw
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Posted on Jan 02, 2017
You do scare me. I'm afraid this project is over your skill level. The "HOT" side of the circuit come thru the breaker as the black wire. The "ground" wire is normally white and is attacked to the grounding bar in the electrical enclosure. Are you really ready to do this project? A wrong move could kill you!
Posted on Jun 12, 2009
SOURCE: installing a outdoor timer t104m
Open following link for wiring diagrams and manual.
240Volt T104 can be wired many different ways.
What is the significance of 'next to the pool pump timer?'
Are you getting power off the 240V pool pump timer to operate the new T104? This is perfectly fine. The pool pump wires would bring power from the breaker box.
Is the new T104 going to control 120Volt lights? The timer can do that, it just has to be wired correctly.
In any case, the T104 has 240Volt (or 277V) clock motor, and clock will not operate with 120V
If you add specific details, I can help with exact wiring diagram for your project.
Posted on Apr 18, 2011
SOURCE: I have 2 intermatic T104M
You might have to add a comment to help sort this out.
USUALLY but not always, if your red wire is connecting to terminal 3 on one timer, then it also connects to terminal 3 on other timer BUT these timers can be wired many different ways.
I have T104 timer on my desk and know the terminal numbers and wiring but I can't see your wiring.
Always take a photo of wiring before starting the replacement process.
Timers should not have both solid and stranded wire connected to same terminal because screw plate will tighten down on solid copper wire, but stranded wire will be loose.
Also make sure that no part of insulation on wires is under the screw plate.
Open following link for T104 wiring help:
Posted on Apr 30, 2011
SOURCE: I have a intermatic T104m
If you are flipping it off manually and it still won't shut off then the contacts are burnt together internally.
This means that you need to change this timer out....
If you switch it with the same timer you will not need to change the whole box... the old board will snap out and the new board will just snap in the old box, making the change out much more simple.
Posted on Aug 15, 2011
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