Discuss Meter tails over 3 meters in the UK Electrical Forum area at ElectriciansForums.net
about 3 ft 3 inches.Whats a metre between friends?
about 3 ft 3 inches.
DeletedThanks SP, i read that the DNO base the 3m rule on an assessment of risk (ie its less likely to be drilled through if the length is shorter) and not on any mathematical equations. Im sure there is something in the regs relating to this. I looked at an older install earlier, the tails are about 4m without a SF. If I were to quote for a new CU, should I (need to) install a switch fuse on the tails ?
3 meters is mentioned in the regs in sections 433.2.2 & 434.2.1.
computer says 3mtr max .Think I will give the DNO a call
Only if the DNO agrees their fuse can be used.433.2.2 concerns devices for protection against overload, however the next one (433.3.1 [iii]) concerns omission of devices for protection against overload, and says a device can be omitted "where the suppliers fuse affords protection to the part of the installation between the origin and the main distribution point of the installation where overload protection is provided" (The CU in this case). So that rules that out. Looks like it is the DNO rules regarding tail length
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