Discuss 16mm T&E in the UK Electrical Forum area at ElectriciansForums.net
Yes, stud work cavity etc.What was the installation methods for the cable to c.u ? was it run down in the cavity.
OK for CCC on line and neutral, if a TNCS supply then the earthing conductor is undersized, if TNS then probably OK.
If buried in the wall <50mm then needs 30mA RCD protection, though most DNOs do not bother protecting tails from cut out to meter when buried in the wall!
How are the live conductors terminated in the switch fuse as it is normally hard to get a fully enclosed live conductors from a twin and earth cable without leaving exposed insulation.
yesDid they run a separate GY too or are they relying on the existing earth?
Is the T&E more than 50mm from the surface?
LOL, Yeah must be tight on price.They must of had some 6242y left over from another job, 'cos 6181y is cheaper per metre
If any extraneous conductive parts exist then these could be bonded back to MET with 10mm being tncs Rather than the CU. how do you know the installer wasnt going to use a 63A fuse in there if it was at 1st fix stage? If the 16mm is conected to a sw fuse why would you not then treat it as a circuit and then do an adiabatic to work out the cpc.
He who sticks his nose in a wasps nest will get more than a nostrill full of honey comes to mind here!!
Didn't think that was allowed, i.e. if one becomes disconnected the EC might fail under fault conditions?The MET would be in the consumer unit main 16mm earth being made up of the 10mm earth and 6mm in T&E.
New houses have sub-dist circuits wired like this for years.Didn't think that was allowed, i.e. if one becomes disconnected the EC might fail under fault conditions?
PS and fault current may not be evenly distributed between two separate cables
OK for CCC on line and neutral, if a TNCS supply then the earthing conductor is undersized, if TNS then probably OK.
If buried in the wall <50mm then needs 30mA RCD protection, though most DNOs do not bother protecting tails from cut out to meter when buried in the wall!
How are the live conductors terminated in the switch fuse as it is normally hard to get a fully enclosed live conductors from a twin and earth cable without leaving exposed insulation.
Reply to 16mm T&E in the UK Electrical Forum area at ElectriciansForums.net
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