Discuss MBPC to steel columns in warehouse area in the UK Electrical Forum area at ElectriciansForums.net
Yea …. It’s an existing building dating back some years … never got a mention before..came up on EICR… linking these columns approx 300m 10mm Earth cabling… quite a job… will test to see if they are extraneousInteresting situation, as each of those columns in to a concrete base would defiantly count as an extraneous conductive part. My view is though ought to be bonded as I guess they are all within some sort of distance that contact with the installation's CPC system is possible.
They would not all need to go back to the MET but probably you could zig-zag some bonding from MET to one column and then across wood beam tops or similar to link them all up in some pattern with (hopefully) sane length of bond wire.
Is it TN-C-S ?
And is it needing more than 10mm bond?
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