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Meter Tails in Galvanised Trunking...Is that a thing?

Discuss Meter Tails in Galvanised Trunking...Is that a thing? in the UK Electrical Forum area at ElectriciansForums.net

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Hey all,
Excuse the ignorance here but I wonder if you lovely folk might have any opinions or better still be able to point in the right direction in the BBB.
I am being asked to move a CU from its current position, behind a fitted kitchen, under the sink and totally inaccessible, except to the countless bottles of Fairy and Pledge etc, that share a home with it.
The meter backs on to it in a recessed box. I need to move the CU all the way down the side of the house, about 8-10m and pop it back on the same wall. I was going to pop an IP65 metal enclosure in the current location and extend all the circuits (actually only 4, thank goodness (or words to that effect!!)) along the outside of the house in singles inside galvy steel trunking. The house has a concrete floor throughout so there's no popping up a board here and there and running the lot along the dirt.
So far, so simple...SO...moving on to the incoming supply side...The meter will now be about 8-10m away from the proposed site for the CU. I normally install a fused switch and then run the appropriate sized armoured (in this case it'll be 25mm) from the FS to the CU. In this instance I was toying with the idea of not doing that but to run meter tails inside the galvy alongside the extended final circuits. Is this acceptable? If not, can you point me in the direct of evidence to this end in the BBB. I have a niggling concern that the DNO only want SWA used to feed CUs or DBs when they're over 3m from the incomers, but for the life of me, I don't know where I go the info...I may even have dreamed it.
Thanks in advance for all your help with this quandry, and obviously thanks too to Pete, who will no doubt point out the fact that I should, in fact, have become a cab driver and left this electricing lark to my betters!! ;-)
 
The DNO will give you a maximum length for tails. (usually 3m). You described the best way earlier which is to run them into a fused iso and then run off SWA it singles if protected correctly. Neither need RCD protection so won’t be a problem.
 

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