3 core & earth

[grifter]

I want to connect 2 way switches for lighting. Can l use 1.0mm 3 core & earth or does it have to be 1.5mm? Thanks

 

[EFLImpudence]

Yes, 1mm² is fine.

For some unknown reason 1.5mm² has become a fashion.

 

[Murdochcat]

That rather depends on the load and length of the circuit.

 

[bernardgreen]

1.0mm cable can be 70 metres when load is 500 Watts ( 2.2 Amps )

 

[grifter]

1.0mm cable can be 70 metres when load is 500 Watts ( 2.2 Amps )

Will be supplying 8 down lights in a 5x3 metre room.

 

[flameport]

Will be supplying 8 down lights in a 5x3 metre room.

40W at most.

1.5mm² is a useless cable that has no purpose in any domestic property.
Buying it is simply throwing money away for no reason.

 

[JohnW2]

1.5mm² is a useless cable that has no purpose in any domestic property. Buying it is simply throwing money away for no reason.

Are you talking specifically about 3C+E (in which case I would probably agree with you) ?

1.5 mm² T+E certainly has good/valid purposes in a domestic property (fused spurs/branches from ring/radial final circuits, 16A circuits {e.g. immersions}, many 20A radials etc.) - in which cases it is cheaper and uses less copper resources than does 2.5 mm².

I certainly agree that 1.5 mm² cable on 5A/6A lighting circuits has never made any sense, and I really don't understand why/how it ever became fashionable!