On 27/01/2019 10:38, Brian Gaff wrote:

Hmm, not convinced. would you not wish to know that the cable has an issue?

Define issue. If the head end is TN-S or TN-C-S, then any fault on the
submain could trip the head end MCB if required.

Having a fault trip your lights while working in an outbuilding may well
indicate you have an issue, but not in a particularly useful way!

--
Cheers,

John.

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