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Old 02-03-2012, 02:47 PM   #16
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hooking up 3 baseboard heaters to one wall thermostat


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Originally Posted by Mikenra View Post
This might be a stupid question but can you define "fried the breakers" does that mean they smoked and they are no longer functional or did they trip

lol- no its not a stupid question , my attempt to figure this out , (i feel) is stupid - Fried breakers are burnt up , no good , hence "fried" they tripped immedialtly as if there was a direct connect to ground

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Old 02-03-2012, 02:57 PM   #17
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hooking up 3 baseboard heaters to one wall thermostat


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Originally Posted by jbfan View Post
Forget calling it a 120v line.
What you have is a 240 heating system with a single pole thermostat.

the incoming 240 v should connect to one leg of the thermostat, and the other leg should connect to one side of all the heaters.
The other side of the thermostat should connect to the other leg of the heaters.

How many wires are inside the thermostat box?

240v @20 amps gives you 4800 watts.
okay now we're gettin somewhere - i do have a voltage meter , and i have one wire to the box from the electric panel that is "hot" ( or line ) from 2 breakers located within the electric panel , each breaker is a 20 amp breaker , the wires are 12 gauge , now in the electrical box ( where the thermostat goes ) are the "hot" or line wires and 3 other sets of wires that go to the heaters , all 3 totalling 2100 watts maximum wattage - all three sets of wires from the heaters are 12-2 gauge wiring , as is the line wire coming from electric panel - now i have one question , giving the fact that the 2 wires coming from the electric panel are "hot" is it NOT recommended that these two wires be connected ?
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Old 02-03-2012, 05:09 PM   #18
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hooking up 3 baseboard heaters to one wall thermostat


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Originally Posted by glennbo

okay now we're gettin somewhere - i do have a voltage meter , and i have one wire to the box from the electric panel that is "hot" ( or line ) from 2 breakers located within the electric panel , each breaker is a 20 amp breaker , the wires are 12 gauge , now in the electrical box ( where the thermostat goes ) are the "hot" or line wires and 3 other sets of wires that go to the heaters , all 3 totalling 2100 watts maximum wattage - all three sets of wires from the heaters are 12-2 gauge wiring , as is the line wire coming from electric panel - now i have one question , giving the fact that the 2 wires coming from the electric panel are "hot" is it NOT recommended that these two wires be connected ?
There is no reason to connect them together. You need to remember that If each line is coming in from a separate pole in the panel then the sum total of volts is 240. You have a 240v heating circuit NOT 2 individual 120v circuits. Apparently they used the wrong breaker if it's 2 separate breakers. On a single pole thermostat one line goes to the line side of the thermostat the other line from panel splices through to one load wire going to heater. The load side of thermostat goes to the other load wire going to heater. It seems to me that instead of daisy chaining heater to heater they ran the lines from all 3 into the thermostat box. You need to fine out which sets of two go together.

Last edited by Mikenra; 02-03-2012 at 05:11 PM.
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Old 02-03-2012, 05:59 PM   #19
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hooking up 3 baseboard heaters to one wall thermostat


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okay now we're gettin somewhere - i do have a voltage meter , and i have one wire to the box from the electric panel that is "hot" ( or line ) from 2 breakers located within the electric panel , each breaker is a 20 amp breaker , the wires are 12 gauge , now in the electrical box ( where the thermostat goes ) are the "hot" or line wires and 3 other sets of wires that go to the heaters , all 3 totalling 2100 watts maximum wattage - all three sets of wires from the heaters are 12-2 gauge wiring , as is the line wire coming from electric panel - now i have one question , giving the fact that the 2 wires coming from the electric panel are "hot" is it NOT recommended that these two wires be connected ?
Don't mix up the term "wire" and "cable". 12-2 is a cable with two wires.
You should have two hot wires (inside the same cable) coming from the two pole breaker.
If all three heaters are joined inside the same box that has the thermostat, you will take one wire from each heater and connect it with a large wire nut to one of the hot wires. You will take the other hot wire and connect it to the thermostat. The other wire from the thermostat will be connected to the remaining three wires from each heater.
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Old 02-03-2012, 06:22 PM   #20
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hooking up 3 baseboard heaters to one wall thermostat


If you are sure about the wires that come from the breaker panel and the wires that go out to the heaters.

Wire nut all the white wires together including the one from the breaker that is hot. Wire nut the line from the thermostat to the black hot wire from the breaker and then wire the load on the thermostat to the remaining black wires. Connect all your ground wires together.
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Old 02-03-2012, 07:09 PM   #21
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thanks everybody for your reply - seems i had it right the first time , power feedin back from the wires i was supposed to hook up to the thermostat was "correct" way to hook it up , thats what threw me off - so what i did was to hook up all the white wires together and that put 120 on one side of the heaters , then i hooked up the black "line" wire to the line on the thermostat and hooked up the "load" side of the thermostat to the black wires leading to the heaters - duhhhh , it all works fine now all three heaters are functioning and i'm glad its over - lol, thanks to all for your help , i'm sure i'll be enquirin your services again sometime - Glennbo
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Old 02-03-2012, 07:11 PM   #22
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hooking up 3 baseboard heaters to one wall thermostat


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Originally Posted by a7ecorsair View Post
Don't mix up the term "wire" and "cable". 12-2 is a cable with two wires.
You should have two hot wires (inside the same cable) coming from the two pole breaker.
If all three heaters are joined inside the same box that has the thermostat, you will take one wire from each heater and connect it with a large wire nut to one of the hot wires. You will take the other hot wire and connect it to the thermostat. The other wire from the thermostat will be connected to the remaining three wires from each heater.

thats exactly what i did "A" , I actually did that in the first case , but when i tested the leads and all had power comin from them , well that threw me off - but thanks again
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Old 02-03-2012, 07:12 PM   #23
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hooking up 3 baseboard heaters to one wall thermostat


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Originally Posted by rrolleston View Post
If you are sure about the wires that come from the breaker panel and the wires that go out to the heaters.

Wire nut all the white wires together including the one from the breaker that is hot. Wire nut the line from the thermostat to the black hot wire from the breaker and then wire the load on the thermostat to the remaining black wires. Connect all your ground wires together.

thanks Rolston , you've been a big help , i had it right in the first place - thyen i started "thinkin" and thats when all the problems occurred - Glennbo
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Old 02-03-2012, 07:13 PM   #24
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hooking up 3 baseboard heaters to one wall thermostat


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There is no reason to connect them together. You need to remember that If each line is coming in from a separate pole in the panel then the sum total of volts is 240. You have a 240v heating circuit NOT 2 individual 120v circuits. Apparently they used the wrong breaker if it's 2 separate breakers. On a single pole thermostat one line goes to the line side of the thermostat the other line from panel splices through to one load wire going to heater. The load side of thermostat goes to the other load wire going to heater. It seems to me that instead of daisy chaining heater to heater they ran the lines from all 3 into the thermostat box. You need to fine out which sets of two go together.
lol- got it Mike
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Old 02-03-2012, 07:15 PM   #25
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hooking up 3 baseboard heaters to one wall thermostat


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Originally Posted by Jupe Blue View Post
If you didn't document the original connections and you are now "frying" breakers, it's time to bring in an electrician. With their work experience they should be able to fix the problem quickly. It's hard to troubleshoot a problem like this by 'trial and error'.

If you want help from this forum start by posting a picture of the problem. A picture will help people to start commenting.
thanks Jupe , bringin in an electrician wasn't a solution YET !! lol - i got it and never hook up two seperate line wires together - lol - I had a brain fart - Glennbo
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Old 02-03-2012, 07:42 PM   #26
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hooking up 3 baseboard heaters to one wall thermostat


if you only have 2 wires on the stat then you only can break one 120V wire from the breaker and the other from the breaker direct to the heater which will shut off the heater

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