O
Octopus
Ok. based on another recent thread I hope we can get to some sensible suggestions to this conundrum I have due to a visit on my way home today!
Underfloor heating (recent install) is tripping the RCD - the CU has all socket circuits and lighting circuits on the RCD so when it trips pretty much everything goes off.
Underfloor mat is this stuff:
Floor Heating | Underfloor Heating Foil - https://www.magnumheating.co.uk/products/32-1-floor+heating+/p-226-MAGNUM+foil+set
There is only the L & N running from the controller to the mat, so no CPC and thus its not possible to IR the system
An IR test from the L of the mat, (L & N both disconnected from the controller) to the CPC of the socket circuit its connected to via a FCU only gives just over 1 meg ohms.
End to end reading is OK.
I did a direct connection from the FCU to the mats and it tripped immediately .
The installers put this down about 6 weeks ago and its not worked properly since then.
The mats are laid side by side and with 5 mats connected the RCD goes immediately, with only 2 connected, the RCD holds. Which points at one of the 3 disconnected units having an issue but the installer says it has worked with all 5 connected.
What was interesting is that when the mat is on, there is a distinct "hum" from part of the floor.
Having read the manufacturers website and checked with the installer, they didn't use the damp proofing foil!
Any comments, sensible or off topic please - I've never seen this stuff before and hope some of you have!
thanks
Underfloor heating (recent install) is tripping the RCD - the CU has all socket circuits and lighting circuits on the RCD so when it trips pretty much everything goes off.
Underfloor mat is this stuff:
Floor Heating | Underfloor Heating Foil - https://www.magnumheating.co.uk/products/32-1-floor+heating+/p-226-MAGNUM+foil+set
There is only the L & N running from the controller to the mat, so no CPC and thus its not possible to IR the system
An IR test from the L of the mat, (L & N both disconnected from the controller) to the CPC of the socket circuit its connected to via a FCU only gives just over 1 meg ohms.
End to end reading is OK.
I did a direct connection from the FCU to the mats and it tripped immediately .
The installers put this down about 6 weeks ago and its not worked properly since then.
The mats are laid side by side and with 5 mats connected the RCD goes immediately, with only 2 connected, the RCD holds. Which points at one of the 3 disconnected units having an issue but the installer says it has worked with all 5 connected.
What was interesting is that when the mat is on, there is a distinct "hum" from part of the floor.
Having read the manufacturers website and checked with the installer, they didn't use the damp proofing foil!
Any comments, sensible or off topic please - I've never seen this stuff before and hope some of you have!
thanks
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