In article ,
Dave Plowman (News) wrote:
In article ,
Tim Watts wrote:
We were taught on a ring main to put one earth into each terminal, that
way if a terminal fails, you still have a CPC to the socket faces, but
of course no loop continuity around the ring.

Probably just me, but I've never understood the principle behind having
two earth terminals. I'd say it doubles the chances of one not being
properly tightened.

It's quite useful to run a link to the back box when a spur has filled up
the first one.

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from KT24 in Surrey, England