ChatterBank0 min ago
Wiring In The Wall Cavity
Is it permissible to run parts of the house ring main using the cavity rather than conduit. When I had a extension done in the 1970's, which became the kitchen some of the socket wiring was done using the cavity. We are now having a kitchen makeover and when I mentioned about the cabling I was told this is allowable, Is this correct. Thanks for any advice.
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@ iggle .......... /Where's 'The Builder' when you need him ? /
Haha.......... at the time, I was playing a nice gig in an Italian restaurant. :o)
Well, to answer the original question..........
In Building, there is always this kind of debate. NHBC do rule that cavity wiring is not allowed, but then they are known for being rather didactic. It comes from their having to protect their insurance indemnity.
Official Building Regs are quite different. Most of them are a matter of interpretation. Definitive rules are often absent. They simply say that cables, as with anything else, must be suitable for the job; fitted/clipped correctly; protected etc etc. It's up to you how you do it.
Many electricians would consider it to be bad practice, but plenty of conscientious, experienced tradesmen would have no qualms about wiring in a cavity. It simply comes down to how you go about it, regarding cable protection etc, plus all the other factors that have to be taken into consideration.
There are always more than one way of accomplishing something. That's where experience lies.
Haha.......... at the time, I was playing a nice gig in an Italian restaurant. :o)
Well, to answer the original question..........
In Building, there is always this kind of debate. NHBC do rule that cavity wiring is not allowed, but then they are known for being rather didactic. It comes from their having to protect their insurance indemnity.
Official Building Regs are quite different. Most of them are a matter of interpretation. Definitive rules are often absent. They simply say that cables, as with anything else, must be suitable for the job; fitted/clipped correctly; protected etc etc. It's up to you how you do it.
Many electricians would consider it to be bad practice, but plenty of conscientious, experienced tradesmen would have no qualms about wiring in a cavity. It simply comes down to how you go about it, regarding cable protection etc, plus all the other factors that have to be taken into consideration.
There are always more than one way of accomplishing something. That's where experience lies.
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Apart from the above issues an external cavity wall is, or could become insulated at a later date and any wiring within the cavity must be calculated for current carrying capacity using the appropriate correction factors.As the bloke injecting the cavity will be unaware of any cables they could overheat if sized incorrectly.
