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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?
 
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Pete999

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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?
No not really
 

ferg

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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.
 

Spoon

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I always go for Special Fried Rice, carton of curry sauce and a bag of prawn crackers from the Chinese... Does that count?? :)
 

Welchyboy1

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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)
 

Pete999

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I always go for Special Fried Rice, carton of curry sauce and a bag of prawn crackers from the Chinese... Does that count?? :)
Nah Sweet and Sour chicken balls.
 

telectrix

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SZECHUAN CHICKEN with extra hot chilli sauce and chips., washed down with Theakston's old peculier
 

Spoon

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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.
 
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