On 15/02/2004 manoman opined:-
1mm twin and earth and 3 core and earth for the two way and lighting
circuit
?

Well I guess, but that means two lots of cable when a reel of one type is
sooooo cheap. Any benefit to using 1mm?

You will find out in trying to wire the lighting in 2.5mm, that you can
only get one 2.5mm core into each lighting circuit terminal.

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Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.org