Anyone go the BBB to hand - reg regarding mix and match

[Octopus]

So next week I have to add a circuit to this board:

My plan is to add a Wylex breaker ........... but how would the BBB wording cover this?

I haven't bough the BBB yet!

After all, its not me that added the 3rd party breakers

 

[GBDamo]

It’s only your work that has to comply.
However you will have to take on board that the type testing has been voided, so any protective device you install will have to have a breaking capacity greater than the measured PFC.

That seems simple enough having never seen a PSCC or PEFC Low enough to challenge thebreaking capacity of domestic devices.

Que next job, Ze of 0.01 and me on here asking of you can get a 50KA MCB

 

[GBDamo]

It’s only your work that has to comply.
However you will have to take on board that the type testing has been voided, so any protective device you install will have to have a breaking capacity greater than the measured PFC.

That seems simple enough having never seen a PSCC or PEFC low enough to challenge the breaking capacity of domestic devices.

Que next job, Ze of 0.01 and me on here asking of you can get a 50KA MCB

 

[Dave OCD]

Don't you mean high enough ?

 

[GBDamo]

Don't you mean high enough ?

No. Low enough.

Low Ze = high PSCC/PEFC

230V/0.01 Ohms = 23,000A

230V/0.1 Ohms = 2,300A

 

[GBDamo]

What have I missed this time??

 

[Toneyz]

This is not a consumer unit mcb's etc wylex identical with another name for another country eg like we used to have Marathon and others had Snickers. Just the name and printing different.

 

[GBDamo]

What have I missed this time??

Seen it now :-(

 

[telectrix]

If I have learned one thing from this forum there seems to be a lot of notes on Certs going on.

thanks.i'll make a note of that. .

 

[mrloy99]

funny that. just quoted a job to fit a new shower. 1960'shager DB, no RCD, and the ptatt who fitted the existing shower ( 9.5kW wired in 10.0mm ) fitted a 50A Volex MCB on it. this was under 3 years ago, so apart from mixing devices, he'd completely ignored the fact that he should have fitted a RCBO.

Are they nessary under the regs..I dont think so unless the cable is buried. Or is munufactors instruction Although I always do fit myself.

 

[Deleted member 26818]

Are they nessary under the regs..I dont think so unless the cable is buried. Or is munufactors instruction Although I always do fit myself.

Yes they are necessary.
All circuits of locations containing baths or showers require RCD protection.

 

[telectrix]

Yes they are necessary.
All circuits of locations containing baths or showers require RCD protection.

question is , though, if replacing a shower like for like, no alterations to wiring, is it mandatory to fit RCD, xcepting following MIs?

 

[Deleted member 26818]

question is , though, if replacing a shower like for like, no alterations to wiring, is it mandatory to fit RCD, xcepting following MIs?

Must have misunderstood something somewhere.
There’s no requirement other than in MIs to provide RCD protection for showers.
The requirement in BS7671 is to provide RCD protection for the circuits.
So if it’s just a like for like replacement to the shower, no alterations to circuits, no new circuits, then no, RCD protection is not required, at least not by BS7671.

 

[Dave OCD]

But you'd be foolish not to, particularly within a defined special location.

 

[Toneyz]

Before we had RCD's/RCBO's providing the additional protection we had supplementary bonding in bathrooms if I was replacing like for like replacement I would be looking for this and compliance with the regs at the time of installation.

 

[Dave OCD]

And I'd always install a suitable RCD for the same scenario, or walk away. I doubt you'll find any electric shower M.I.s that don't state this as a requirement.