Flex for fixed wiring

[Dave OCD]

When wiring system boilers with zone valves etc at a different location I always use twin and/or three core and earth between the locations then change to h/r flex adjacent to the final connections.

 

[Ian1981]

The regulations do indeed allow flex to be used as fixed wiring as long as it’s the heavy duty type unless the risk of damage during installation is low etc etc, types of flexes are given in bs en 59565-1
For more detail see regulation 521.9.1 page 126 of bs7671.

 

[chris murphy]

Interesting timing ...........over in the plumbers forum I have just said that as far as I'm concerned boiler wiring is "control" wiring and therefore use of 5 core "flex" is perfectly acceptable......

off to my bunker now with tin hat on!

Hello Murdoch,

Thanks for your Expert opinion - I am pleased that you would be happy for Flex to be used to wire Heating System Controls / `Controls Wiring`.

Although as I mentioned Electricians carried out the wiring on my Heating systems - usually because the Builder / Customer always wanted only ONE Electrical Contractor / Electrician certifying the whole property`s Electrical Installation - and therefore the wiring was `nothing to do with me` - I still was not completely happy that `My System` had been wired correctly.

I am also pleased to see Member Dave OCD`s message describing what I described as a method that I would have liked to have seen done.

So after many Years although I had no responsibility for the wiring on most systems [since 2005] I am reassured that both methods are acceptable - "Thanks".

Regards,

Chris

 

[chris murphy]

The regulations do indeed allow flex to be used as fixed wiring as long as it’s the heavy duty type unless the risk of damage during installation is low etc etc, types of flexes are given in bs en 59565-1
For more detail see regulation 521.9.1 page 126 of bs7671.

Hello Ian1981,

Thank You very much for the information.

Would you guess that if the Flexes that I have described were `BS Heat Resistant Butyl` it would be likely to be `Good Quality` / `Heavy Duty` ?

I would never have known the specific BS / EN Numbers.

I would value your opinion please.

Regards,

Chris