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Old 05-05-2010, 08:07 PM   #16
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In-Floor Heating Cable Trouble...


I'd say it's all good. Don't forget to measure to the ground braid, too...from each power lead. You should have infinite ohms from power lead to grounding braid.

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Old 05-05-2010, 10:06 PM   #17
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In-Floor Heating Cable Trouble...


Quote:
Originally Posted by Speedy Petey View Post
Yes. Take up the floor and replace the cable on the tiler's coin. No other option IMO. You are not about to repair it.
This is why we do an ohm check out of the box; once installed; and then after tile/flooring. Any differences along the way point to who caused the problem. If you left with the ohms in range and came back to find the cable shorted or open it is obviously an issue that was caused after you laid the cable.

For the record, I HATE that single wire radiant heat. Give me a mat any time.
Same goes for Snow Melt water-heated tubing or PEX. Once a leak develops, there's no other option than to rip-open the entire covered area!!

Last edited by spark plug; 05-05-2010 at 10:07 PM. Reason: Missing word. (For)!
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Old 05-05-2010, 10:14 PM   #18
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In-Floor Heating Cable Trouble...


I did a continuity test from the ground to each lead and there wasnt any sound from the meter or reading so thats a good thing.hopefully it doesnt drop anymore,if thats what it does when the wire is getting worst.Dont understand the ohm thing yet.thanks alot guys for the advice.
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Old 05-06-2010, 12:42 PM   #19
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In-Floor Heating Cable Trouble...


Quote:
Originally Posted by revid View Post
I did a continuity test from the ground to each lead and there wasnt any sound from the meter or reading so thats a good thing.hopefully it doesnt drop anymore,if thats what it does when the wire is getting worst.Dont understand the ohm thing yet.thanks alot guys for the advice.
Please permit me to comment on something that's been "Bothering"? me for a while. People have been running to digital meters since they came on the market. A/O to the older, Analog meters. IMHO, (even though I own a digital Multimeter) an Analog type Multimeter is much easier to understand and discern its readings, especially in testing for continuity, than the Digital meters. In your specific case, (According to the reading results you describe.) wires of the heater have not shorted out. It's just that continuity has been lost in one or both wires. But it doesn't make much of a difference. You'll have to rip up the floor anyway, if you want to use radiant heat. Good Luck!!
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Old 05-07-2010, 09:39 AM   #20
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In-Floor Heating Cable Trouble...


Quote:
Originally Posted by revid View Post
I did a continuity test from the ground to each lead and there wasnt any sound from the meter or reading so thats a good thing.hopefully it doesnt drop anymore,if thats what it does when the wire is getting worst.Dont understand the ohm thing yet.thanks alot guys for the advice.
The drop in ohms means nothing. Without getting to technical, if the test on the wire out of the box is i.e. 121.5 ohms and after it's installed it's 1.1 ohms higher or lower, it's only reflecting the difference in temperature of the wire. The resistance f wire changes in diferent temps. Don't worry at all about the dif you're seeing.

As it has been stated, the only time you have an issue is when the difference is measured in considerable changes, not in tenths, or, when there is a short to the braided ground.

That said, it is possible to damage line voltage elements by dropping something heavy on it and measuring a (again i.e.) 10% difference. Now you've 'shortened' the element without creating a true connection point at the end. When activated, it may run for a brief period and then stop running.

The issue speaks for itslef though. Don't damage the element and you won't have any issues!

As to the shortening of the element, yes, technically it can be done fairly easily however, you can't shorten it more than 2% of the total length and you will void your warranty as it is now a different product than what left the warehouse.
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Old 12-18-2014, 08:27 PM   #21
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In-Floor Heating Cable Trouble...


OK, same problem, I have a 363 watt Easy Heat cable under 16" square tiles in a small bathroom. Worked great for 4 years (winter only), then 5 days ago started tripping the built-in GFI in the controller.

I am a licensed electrician and the tile installer. Followed all instructions, spacing, no overlaps, set in floor leveler under tiles. Very careful to not damage cable during installation.

Since then no rugs on the tile, no cracks, no damage, no alterations.

Measures 40 ohms as it should and heats floor if connected to a non-GFI circuit, draws 3.2 amps. Immediately trips if plugged into a GFI.

Measured about 150Kohms, either conductor to braid, understand this should be in the megaohms if cable was not compromised.

Very reluctant to tear up my nice tile job. Any comments?


I have actually thought of just putting it on a timer to operate only from midnite and 5AM.

Measured AC voltage from a dripping wet paper towel laid on a grout corner:

- to cable braid 0.22VAC

- to house wiring ground about 1.9 - 2.5VAC

How dangerous is this?

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Old 12-18-2014, 08:34 PM   #22
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In-Floor Heating Cable Trouble...


I'd say if it is suddenly tripping and the ohms are low, then something is compromised and will only get worse. I wouldn't use it without the GFI. That's asking for trouble. I feel you pain having had to rip up my floor after a tiler damaged the cable.
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Old 12-18-2014, 08:56 PM   #23
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In-Floor Heating Cable Trouble...


I just wonder about the actual risk.

Just measured the voltage between the soaking wet paper towel on the floor and the sink faucets: 1.3VAC.

I suppose it could get worse...
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Old 12-18-2014, 08:58 PM   #24
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That would be my worry.
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Old 12-18-2014, 09:01 PM   #25
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In-Floor Heating Cable Trouble...


Aside from my immediate problem, I had been contemplating installing another floor heat system in a different room.

Are there any records kept on these systems? Cable vs mats, different brands?

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