[Neurotopsy]

Hello all! New to the site and first time poster.... I have a house that has six base board heaters with the thermostats that have a twist knob to control them. (thermostat is by the door and not on the heater). The original wiring in the house has 3 heaters feed off the same two pole 30 amp breaker. (jumps are made in the thermostat boxes).. Heres the problem....I have 240v coming into the thermostat box. At the heater when I break apart the connections and test the voltage I get 120 on each leg when reading ground to hot on the separate legs. When I try and read both legs together to show 240 it doesnt show any voltage....Ive seen this before but its been so long I cant remember what the cause is.....any help would be awesome... Thanks all love the site.

 

[kbsparky]

Bad thermostat. Or broken wire. Maybe a varmit chewed thru it? :blink:

 

[HARRY304E]

Hello all! New to the site and first time poster.... I have a house that has six base board heaters with the thermostats that have a twist knob to control them. (thermostat is by the door and not on the heater). The original wiring in the house has 3 heaters feed off the same two pole 30 amp breaker. (jumps are made in the thermostat boxes).. Heres the problem....I have 240v coming into the thermostat box. At the heater when I break apart the connections and test the voltage I get 120 on each leg when reading ground to hot on the separate legs. When I try and read both legs together to show 240 it doesnt show any voltage....Ive seen this before but its been so long I cant remember what the cause is.....any help would be awesome... Thanks all love the site.

Welcome to the forum

 

[Neurotopsy]

I was considering trying a different thermostat. Sorry for not posting more info....Im an electrician in NC. Thanks

 

[electricmanscott]

Tstat only breaking one leg.

 

[99cents]

But he's getting 120V to ground on each leg at the heater.

 

[HARRY304E]

I was considering trying a different thermostat. Sorry for not posting more info....Im an electrician in NC. Thanks

Sounds like there are splices in the T-stat Box and they're mixed up so that your getting voltage from the same phase to ground.

 

[Neurotopsy]

That was my thoughts exactly...im heading there this morning to go through it. Ill let you guys know what I find.

 

[backstay]

That was my thoughts exactly...im heading there this morning to go through it. Ill let you guys know what I find.

You must disconnect the heater to read voltage at it. Other wise you are just reading the same voltage in a 240 volt circuit. So take both wires off the baseboard, read voltage there. Then read the resistance of the baseboard for good measure.

 

[Dennis Alwon]

But he's getting 120V to ground on each leg at the heater.

He may be getting a reading thru the element of a different heater

 

[bobelectric]

But he's getting 120V to ground on each leg at the heater.

They look real perky.

 

[bml215]

Sounds like there are splices in the T-stat Box and they're mixed up so that your getting voltage from the same phase to ground.

I agree, they are on the same leg. No difference of potential so your meter 0'd out

 

[sbrn33]

IBTL diy at is best. I could fix this in less that 10 seconds.

 

[Neurotopsy]

Yup splice at the thermostats.....and a buried thermostat in the wall....and when I say buried I mean the sheetrock contractor left it in the box and covered over it. Thanks for the input.