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New colour-coding

This topic originated from the How to page called Replacing a one way light switch with a two way light switch
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clarediac

from United Kingdom

Joined: 17 Jan 2007
Posts: 3
Location: Bath,
United Kingdom

PostPosted: Wed Jan 17, 2007 4:46 pm Reply with quote

I am trying to turn a 1-way switch into a 2-way switch but the instructions on the web are based on the old colour-coding for cables. The existing cable in my 1-way switch is red and black. The new 3-core-and-earth is grey, brown, and black. Which colours do i connect together in the C, L1 and L2 terminals? Can anyone help?
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Lectrician

from United Kingdom

Joined: 18 Jul 2004
Posts: 7450
Location: Devon,
United Kingdom
Thanked: 270 times

PostPosted: Wed Jan 17, 2007 4:53 pm Reply with quote

RED YELLOW BLUE is BROWN BLACK GREY respectively.

RED BLACK is BROWN BLUE respectively.

That help??

It doesn't actually matter what colours you decide on for your three core and earth cable, as long as either end is the same. The old RED and BLACK obviously go in L1 and L2 either way around.
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clarediac

from United Kingdom

Joined: 17 Jan 2007
Posts: 3
Location: Bath,
United Kingdom

PostPosted: Fri Jan 19, 2007 4:49 pm Reply with quote

That's great thank you!
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sparkybird

from United Kingdom

Joined: 19 Jan 2005
Posts: 1160
Location: United Kingdom
Thanked: 39 times

PostPosted: Fri Jan 19, 2007 5:45 pm Reply with quote

I always remember it by:

Red becomes Brown (as it was before the colour change at flex light fittings)
Yellow becomes Black (stripes on a wasp) - i know, but if it helps!
Blue becomes Grey (only one left)

I also remember "Grey and Blue into L2" for two way switching
Sad I know!

SB
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chrisbyrd

from United Kingdom

Joined: 08 Oct 2006
Posts: 112
Location: Cambridgeshire,
United Kingdom

PostPosted: Sat Jan 20, 2007 10:02 am Reply with quote

i always think of it like RED is normally used for warnings = LIVE and blue is a kinda 'neutral' colour :p
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