Loft conversion - RCD main switch query

[cdisney]

Hi all

Unsure where to post this so if this is in wrong section I apologise!
I have been asked to wire a family members loft conversion (one bedroom and en-suite) and I am planning to run a 16mm t&e to a new 5 way DB (lights, ring main and electric 10KW shower) in the loft and needed to know if using a RCD as a main switch is allowed and to 17th edition?

Thanks

 

[Marvo]

Electrically speaking I don't see a problem but it can be very inconvenient for the tenant if the entire DB goes off when there's an IR fault on just one of the circuits.

 

[ferg]

Does the cable run from CU to the loft need and an RCD?

 

[cdisney]

I need RCD for all the circuits in loft (shower, ring and lights) and feel this would be the easiest and cheapest way to do this.

 

[Plonker 3]

You need to read section 314 in the BGB

 

[Guest77]

It is painful really, it really is :leaving:

 

[cdisney]

Think I will just go for RCBO's on each circuit to cover my --- and at the end of the day I am not paying for it!!

 

[Octopus]

Think I will just go for RCBO's on each circuit to cover my --- and at the end of the day I am not paying for it!!

How are you protecting the 16mm T&E as it passes up through the house??

 

[cdisney]

50A MCB and YT trunking as they don't want anything chased in.

 

[dan86]

Are you actually an electrician?

 

[cdisney]

Yes but rarely deal with domestic as 99% of the time work industrial/commercial so am bit slow on house bashing.

 

[Geordie Spark]

It is painful really, it really is :leaving:

A bit like having your bollox in an engineers bench vice.

 

[Plonker 3]

You do know that the regs apply the same to all installations and don't alter according to wether it's industrial, commercial or domestic.

 

[dan86]

A bit like having your bollox in an engineers bench vice.

Next week I'll be able to relate to that

 

[dan86]

Think I will just go for RCBO's on each circuit to cover my --- and at the end of the day I am not paying for it!!

quite some attitude to have don't you think? And especially so since its a family member you are doing the work for.

 

[Geordie Spark]

Next week I'll be able to relate to that

If you ask me nicely and drop me a bottle of Scotch I'll sent Tidyboiler up to you with an ice pack and jar of cold cream.

 

[dan86]

bottle of scotch.that all? cheap! Consider it a deal. Mind and tell her to bring that uniform with her

 

[Geordie Spark]

bottle of scotch.that all? cheap! Consider it a deal. Mind and tell her to bring that uniform with her 

The nursing home senior care assistant one?

Do you want her to bring some catheters, incontinence pants and nappies as well?

 

[davesparks]

Hi all

Unsure where to post this so if this is in wrong section I apologise!
I have been asked to wire a family members loft conversion (one bedroom and en-suite) and I am planning to run a 16mm t&e to a new 5 way DB (lights, ring main and electric 10KW shower) in the loft and needed to know if using a RCD as a main switch is allowed and to 17th edition?

Thanks

Why not just extend the existing top floor lighting and socket circuits? then all you'll need to do is run a feed up there for the shower.
There is really no need in a domestic installation to be running 16mm submains just to power a loft conversion, you could probably run 3 average houses on that without it even getting warm!

 

[Engineer54]

Absolute madness!! Running a 16mm sub-main and installing a separate 5 way CU for a 'Single'' bedroom with ensuite, when literary everything is there within reach to supply this additional bedroom, with the exception of the shower....