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Electrical Hookup for Sunstat Radiant Flooring to a 20-AMP Double-Pole Circuit B

Electrical Hookup for Sunstat Radiant Flooring to a 20-AMP Double-Pole Circuit B


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Old 01-23-14, 06:11 AM
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Electrical Hookup for Sunstat Radiant Flooring to a 20-AMP Double-Pole Circuit B

Electrical Hookup for Sunstat Radiant Flooring to a 20-AMP Double-Pole Circuit Breaker.

I have installed a "GE Q-Line THQP 20-Amp Double-Pole Circuit Breaker" Black to one ple, White to the other, and ground/common to the bar. At the end of my cable I measured Black - Common as 120V and White - Common as 120V.

The system calls for a Dedicated 120VAC or 240VAC 20-amp circuit as seen here on page 16
http://www.warmyourfloor.com/media/S...urrent-WYF.pdf
The problem I am having is the Sunstat Control will not power up when I hookup the Black to Line 1 and White to Line 2. If however I change the system to a standard 120V system the control will power up. Have I done something wrong with my 240V setup?
 
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Old 01-23-14, 06:32 AM
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At the end of my cable I measured Black - Common as 120V and White - Common as 120V.
What's your measurement between black and white? You should have 240v. If not, there's something not connected right at your breaker box.

Also, if you do end up using it at 240v, the white wire will have to be reidentified as hot (painted or use electrical tape to color it black or red)
 
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Old 01-23-14, 07:15 AM
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If this is a half size GE 2 pole breaker move it down or up one half space. It is possible to put both poles of a GE half size breaker on the same bus bar. That sounds like what you did.

I measured Black - Common as 120V and White - Common as 120V.
The better place to measure is between black and the (recolored) white. I'll bet that is 0.

Assuming by common you really meant ground. The circuit does not have a common.
 
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Old 01-23-14, 03:47 PM
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Ray you are a genius. I moved the breaker up one and vola 240 volts and everything powers up.

Thank you so much
 
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Old 01-23-14, 05:00 PM
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Been there done that makes the answers easier.
 
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Old 01-23-14, 07:19 PM
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THQP 20-Amp Double-Pole Circuit Breaker"
That was the key. THQP is the thin style GE breaker.
 
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Old 01-23-14, 08:35 PM
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Ill bet "TH" stands for thin.
 
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Old 01-24-14, 07:25 AM
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No, I doubt it. A full size GE plug-in breaker is a Type THQL.
 
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Old 01-25-14, 07:30 AM
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Note: If this floor heat is in a kitchen or bathroom it is required to be GFCI protected.
 
 

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