Downsizing cable in the middle of a circuit?

tomodo · Nov 11, 2015

Hi i am installing 6 2x70w light fittings in a factory, as its a long run I have wired six kliks outlets in 2.5mm singles, I am now deciding if the 3 core 1.5mm flex I have is suitable for the klik plug ends that will supply each light. I am putting on a 10amp breaker so that should be sufficient, but I have read in the kliks online manual that you could wire the kliks in 2.5mm and put on a 16amp breaker then have each light fitting on a 1mm flex, they say this is allowed because overload is not possible as its only feeding 1 light and is only allowed to feed one light and if its a short circuit than the current will be more than high enough to trip the mcb. What do people think of this? thanks

Deleted member 26818 · Nov 11, 2015

This is just the same as spurring off of a 4mm Radial in 2.5mm.

Paul.M · Nov 11, 2015

1.5mm Klik flex on a 10A MCB is fine.

Andy78 · Nov 11, 2015

I'd only be using 1.5mm flex in a klik if I fancied a struggle. 0.75mm would be more than adequate.

Paul.M · Nov 11, 2015

Andy78 said:
I'd only be using 1.5mm flex in a klik if I fancied a struggle. 0.75mm would be more than adequate.

1.5mm flex into a Klik is fine, but please expect repetitive strain injury within your hands and fingers if doing them all day. (1.0mm or 0.75mm should be used as above).