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Just sitting here and thought of this. New combi boilers. What size cable do you run for them? Been putting them on a thier own separate radial circuit for years but I automatically run 2.5mm but I guess a 1.5mm is fine these days as only a 3amp is needed on the old fuse spur. Anyone else install things out of habit that’s now over kill?
 
Just sitting here and thought of this. New combi boilers. What size cable do you run for them? Been putting them on a thier own separate radial circuit for years but I automatically run 2.5mm but I guess a 1.5mm is fine these days as only a 3amp is needed on the old fuse spur. Anyone else install things out of habit that’s now over kill?
No not really
 
I'm the same as you. I wire the circuit in 2.5mm.

TBF I don't keep 1.5 on the van only 1mm, 2.5mm, 6mm and 10mm.

I have 4mm in the shed along with other rarely used cables.
 
i suppose a 1mm on 6A mcb would also be ok if thats whats you chose to do

i still run a 2.5mm but do so to allow for a possible addition in future(may not be me, but another sparky perhaps)
 
SZECHUAN CHICKEN with extra hot chilli sauce and chips., washed down with Theakston's old peculier
 
not sure you can run 1mm for a non lighting circuit

You are correct mate.
Min 1.5mm, Non-sheathed and sheathed cables for power circuits. Table 52.3.
 
Always 2.5 for any power circuit

Just in case for example home owner moves boiler can then turn boiler spur into a double socket
 
Some on here will only use 1.5mm on domestic lighting. I ---- in their tea, flipping trying to get that in some recent loop in/out downlights, and trying to ran in some 2 gang dimmer in the (devil's carnation) 20mm back box. I spit in your face. :)
 

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