size
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Apartment block main earth size
Hi chaps, Could any of you help me out with this one please as I don't usually do apartment blocks and haven't come across this scenario before. Large apartment block built 2004. Looks like the tails enter the consumer unit via Armoured cabling with the armour being used as the main earth &...- captaincaveman
- Thread
- block earth main size
- Replies: 3
- Forum: Periodic Inspection Reporting & Certification
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Minimum bonding size TNC-S
Afternoon all, Just trying to clear something up, going through regs book at present. Basically have got a TNC-S/PME installation, 16mm tails, 60/80a main fuse (think it is 60A), 6mm bonding to water and 6mm coming from service head to block then into CU as main earth. Am I right that being...- robd
- Thread
- bonding minimum size
- Replies: 23
- Forum: UK Electrical Forum
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What contactor size for a 9kw electric boiler
Hi all. Don't have much experience on this topic. Called to a job with an electric boiler. It has a dedicated 10mm supply from a 50A MCB. I narrowed down the fault the the contactor which was only feedig 1 of tge 3 elements and had scorching marks around the other 2 terminals. And is currently...- Brendo
- Thread
- boiler contactor electric size sizing
- Replies: 34
- Forum: UK Electrical Forum
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TT system earth cable size.......
Hi guys At a job doing a re wire and the electrician i was with is changing the earth cable over from 16mm to 6mm He says as its a tt system that it only needs a 6mm. Is this right?- magnoliafan89
- Thread
- cable cable size earth size system tt system
- Replies: 28
- Forum: UK Electrical Forum
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Swa as cpc what size ?
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...- dnjr
- Thread
- cpc size swa
- Replies: 9
- Forum: UK Electrical Forum
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