Stuart wrote:

I was intending taking it from the lighting circuit mcb but as
someone else said a better idea would be to use a spare mcb so it's on
it's own .

If you go for an emergency light fitting like that which Andy described,
then it makes most sense when powered from the lighting circuit that
feeds the lights that normally illuminate the consumer unit.

That way when you lose power to that circuit the light turns itself on
for you, and you can still find the CU even though the other lights on
that floor are tripped.

--
Cheers,

John.

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