SWMBO has now decided we need a fan/light in the dining area of the kitchen !! is it OK to still use the 1mm T&E I have or does it need to go up to 1.5mm? unfortunatley I dont have the rating of the fan as I havent got it yet!!
other lights off that lighing cct will be a twin 5ft flourescent and two 300mm flourescent strips under the wall units.(I cant see the tubes taking more than 100w total)
cheers once again
1mm's fine.
NT
No. Depends on the MCB/Fuse. If it is a 10amp then 1mm^2 is not fine. 1mm^2 should be protected by a 6 amp MCB.
Given the minimal amount of other loading on the circuit I would wonder what was going on if I found a 10A lighting circuit there.
NT
It's not that simple. On a 10A MCB, a run of up to 22m of cable is permitted in the OSG. (1mm^2 can be rated at up to 16A, depending on circumstances.) In commercial premises where 10A lighting circuits are more common, the length of cable runs often exceeds those permitted for 1.0 and 1.5mm^2 cable, which is why larger cables are often found on such 10A lighting circuits, but such long lengths would be very unlikely to be an issue in domestic wiring.
Hi Andrew, the total cable length including switch cables will be around 15m
To answer your original question, 1mm is fine. Even if you had a 10A MCB on the lighting circuit (which is unlikely in a home) 1mm would still be fine.
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