Underfloor Heating Drilled Through!?!

[Mark_Burgess]

Have you had the whole bathroom area fitted with under floor heating.
If you have, did you inform your bath room fitter of the same.

He mentioned it in posts 7/8.

All you can do with the floor is rip it up and start again.

 

[GLENNSPARK]

Mate just tested it. Reckons neutral has been shorted to the earth.

What does he do on the insulation test?

a screw through a 3mm cable... madness!

Post 2

 

[Mr Mike]

He mentioned it in posts 7/8.
Yes Mark he did, I missed that.
Underfloor heating needs to be treated with kid gloves. Check the resistance after un-packing and after each and
every operation/activity to completion.

 

[peterc2609]

Gold star to GLENNSPARK.

Can it be repaired? I'm seeing differing opinion?

 

[peterc2609]

I'm guessing the insulation test wont be much use now.... especially if the neutral is shorted to the earth.

Does that simply point to a screw through the cable?

 

[GLENNSPARK]

If the fault wasn’t there before said fitter arrived how can it be a borrowed neutral?

The only reason i mentioned the borrowed neutral was i asked if he had a recent board change.........

 

[Deleted member 9648]

Did your mate test the cable completely disconnected??....if not you will get a N-E reading if the N is still connected.
If you are using a multimeter to find a fault you are likely to get misled....a high voltage insulation resistance test is still essential before ripping it all up...there's no way I would be relying on a multimeter.

 

[GLENNSPARK]

I'm guessing the insulation test wont be much use now.... especially if the neutral is shorted to the earth.

Does that simply point to a screw through the cable?

If the screw (metal) is providing a fault path between both conductors then...yes

 

[peterc2609]

Yeah cable was totally disconnected.

Looks like a screw, I'll have to remove toilet, tile and repair.

 

[Deleted member 9648]

If the screw (metal) is providing a fault path between both conductors then...yes

The cable is a single conductor,it is likely unless the cable is completely broken that you would get a reading on both the live and neutral ends,which is why I ask if the cable was completely disconnected before the test.

 

[Deleted member 9648]

Yeah cable was totally disconnected.

Looks like a screw, I'll have to remove toilet, tile and repair.

If you think a screw is through the cable test between the cable ends and the screws...that would prove the screw had penetrated the cable before you start ripping it all up.