Here's an interesting one... :)
Amongst other things, was asked to replace a 1G exterior socket with a 2G. Did some basic checks before I started, including IR (L+N to E) on the RCBO-protected socket RFC. ~0.26MΩ, uh oh. Sigh theatrically, ponders a day of unplugging everything then splitting...
whats classes as the correct method of terminating an earth cable when you have double insulated fittings?
You can see on the picture I can’t get a wage inside nor a normal connector block it’s just too tight.
I have seen in the past the cpc being bent over and also snipped off which isn’t...
My assessor said that the minimum CSA for a Main earthing conductor for a TT was 16mm. I questioned this as I thought it was 4mm.
Regulation 542.3.1 states every earthing conductor shall comply with section 543.
Section 543 refers mainly to the adiabatic (reg 543.1.3) or reg 543.1.4 (table...
I have a couple of lights on a circuit that does not have a CPC. The light fittings are plastic but they have a metal trim that screws into the plastic body.
I wonder if anyone can advise me if these are deemed as safe considering the main body of the light fitting is plastic and the metal trim...
is it dangerous to use the cpc in a twin / earth cable? I know it's not safe in case someone else thinks it's still an earth but is that the only reason?
This has probably come up before but I cant seem to find it. I have been presented with an EICR produced by another company where they have put a code 3 down for using the sheath of mineral insulated cables as the CPC. No further explanation on the observations and recomendations sheet. No...
Damn this heat. I just can't think straight!
Been called to an installation where the ceiling was sparking near a light. All the lights were working ok. The spark was coming from a loose earth wire from the light fitting which was touching a metal ceiling frame. I checked the light switches and...
I know there’s the adiabatic equation to work earth size but generally if you install a twin and earth cable for distribution, do you need to worry about the smaller cpc size
My situation is 20 metre 10mm t and e run and not using it to provide earth bonding. Will the 4mm cpc be adequate. 50A...
Hi All,
I recently replaced an old rewirable fuse board for metal split load rcd board. However on testing prior to replacement I noted that one of the lighting circuits doesn’t have a cpc. I’ve put this in the EIC for the new board that no cpc for lights, advised client that needs rewiring and...
Dear all
Testing a garage that is fed in 2 core swa using the swa as cpc
Live and neutral are 2.5mm. I know the swa is fine as a cpc but I’m unsure what size to put on certificate for it
Seen a table that says it’s equivalent to 17mm but in the back of my mind I remember you need to divide by...
We all know this is wrong and breaches regulations and manufacturers instructions.
Good tread on this:
https://talk.electriciansforums.co.uk/topic/23387-cpc-as-interlink-on-smoke-alarm-circuitwhat-would-you-do/
However the question is does it warrant a C2 over C3?
My recommendation is going to...
Just after A bit of advice regarding a load of swa cables into dist board. What's people's preferred methods / good practice regarding banjos fly leads etc. Banjos inside?? If multiple cables are using armour as cpc is it considered bad practice to use 1 fly lead between the two Banjos??? Is it...
Hello everyone
I'm picking up some remedial works from an EICR fail in a commercial property.
Its a 3 phase supply with old steel conduits , trunking & coupled metal equipment, that provides the earth to the various locations.
At present the earthing is insufficient, every earth in the...
I want to use the armour as my CPC but need to check it complies. The cable will be run from a SP Distribution panel to CU.
As per Selection and Erection Guidance Note 1 table D10a I can see a 10mm XLPE SWA requires a 31.1mm csa to comply, but only has 26mm on 2-core.
20171231_114229828_iOS.jpg...
Afternoon guys
Got a job my builder wants me to do in nice block of flats up town
solid concrete ceilings/walls/floors unfortunately!
lighting is just staying as is- but them want extra sockets added and a new 5amp socket circuit for lights
the existing sockets are wired in single in tube in...
OK, lets have a decent discussion about this as I'm sure there will be a number of opinions!
Have done an EICR on a 40 + year old flat. The lighting circuit is wired in singles and utilises the steel conduit as the CPC. Out of the 6 lights and using my R2 wander lead, only 2 have an acceptable...
Hi just thought I'd throw this out here for a bit of light entertainment after the @Marvo thread (phew!)
So brother in law asked me to look at EICR which returned unsatisfactory. I have not looked at the installation to ascertain as to Class 1 or 2 fittings in the premises are installed. The...
Evening,
Just joined upto this forum after a search online for some info, hopefully someone can help me?
I have taken over a job from another contractor who has run in a 50mm 4 core swa from a substation to a TP&N DB roughly 100m away.
My concern is that it appears they have not run a separate...
I've tried to find a solution on here to this exact scenario but had no such luck.
Could somebody please advise on where I should place the earth wire on a plastic back box with no earth terminal when adding a new metal face plate? The face plate has an earth terminal on it and was probably...
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