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Old 10-19-2012, 07:05 PM   #1
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Default STC 1000 wiring diagram question

Hi Guys,

I have a noob question on STC 1000 wiring. I wired my device according to this diagram.





I plan to use heating and cooling, so I broke off the metal tab on the side of the outlet taking wires from terminals 6 and 8 - that was clear.

What isn't clear is if I'm supposed to break off the tabs on the side of the outlet taking the neutral wires from terminal 2 and the wall plug.

This is what I did, and I get no power when I plug it in (STC 1000 won't turn on).

Thanks for the help


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Old 10-19-2012, 07:10 PM   #2
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From the way that looks than no don't break off the tab on the neutral side.. Also. It's not on there but u might look into adding an in-fuse to protect ur system


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Old 10-19-2012, 07:17 PM   #3
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That's what I suspected, but I don't want to start a fire if I transpose to another outlet and not break off the tab on the neutral side.
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Old 10-19-2012, 10:36 PM   #4
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Good luck with your project, show some pictures when it's don
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Old 10-22-2012, 03:23 PM   #5
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OK, I don't have a photo yet, but I can confirm that NOT breaking off the tab on the neutral side makes it all work as expected.

To me, the above was the most clear of the many wiring diagrams Google will bring up.

Note to others, do break off tab on hot side, do not break off tab on neutral side.

Thanks for the help!
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Old 11-14-2012, 11:44 PM   #6
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Best diagram I found for what I need.

Here is a video of the same exact wiring method:
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Old 11-14-2012, 11:55 PM   #7
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I have 2 of these controllers one in my fermentation cabinet and one a stand alone

You should not break the tab on the neutral side

At this point you need to put a jumper wire between both white wires.
or buy a new outlet
the jumper will work just fine though.

See this Thread for more info
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Old 11-15-2012, 12:08 AM   #8
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I'm a maß in at this point but from looking at the diagram it appears that you are bringing in two 110V hots for 220V and earth and connecting the 220 through switches in a controller, to 120 V outlets. That just doesn't strike me as a good thing to do. I assume the heating and cooling loads are both 220. If not, of course, you are courting disaster.

I deduce that it is 220 from the power supply connection because it is labeled 'Power Supply 220 VAC'. OTOH the color coding in your diagram suggests a single hot (black) and neutral (white) which indicates 110 volts coming in in which case the hookup is fine (assuming 110V heating and cooling loads).

Now this is the hard part and you must forgive me but IMO if you have to ask the questions you did about the straps you shouldn't be fooling with wiring. Please have an experienced person check on what you are doing.
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Old 11-15-2012, 12:13 AM   #9
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Yes - I used the diagram above for 110v despite the labels saying 220 (ie: single 110 hot in, 110 cooling, 110 heating).

Works great.
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Old 11-15-2012, 12:14 AM   #10
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I dint notice the 220 VAC on the ST1000 controller.

I hope you are using the 110 volt unit to connect up to a standard 110 volt outlet.


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