Is this new wiring safe?

[Hussain Ali]

Yes rocky that's the sad thing. They've done an amazing job of the bathrooms. My only complaints are the electrics and the use of cheap extractor fans.

 

[Hussain Ali]

Oh and the fact they didn't put my loft insulation back in place. Maybe that's a good thing though because I may not have picked up in this.

 

[securespark]

They should sort out the insulation over the recessed lighting.

https://www.downlights.co.uk/faq-can-i-put-loft-insulation-over-downlights-.html

 

[Hussain Ali]

The bulbs are 7w LED running off of mains voltage so shouldn't generate much heat, is a cap required in that case?

 

[FrodoOne]

Had a look at the spotlights this morning and they don't appear to have any double insulated symbol. Here's some pictures. Are these ok?View attachment 116634 View attachment 116635 View attachment 116636

I have not noted that any one else has actually commented on this post but those are GU10 2-pin bayonet mount connectors and operating under mains voltage rather than any lower voltage.

 

[EFLImpudence]

Good point.

 

[Hussain Ali]

Frodo, sorry for my ignorance, but what's the relevance of that? Is it ok?

 

[333rocky333]

Frodo, sorry for my ignorance, but what's the relevance of that? Is it ok?

The main point is that the earth should be retained up to the mains voltage light, regardless of if they need it, you seem to say only L and N were taken to the connecter.
This was approached in earlier posts addressing the issue of whether the lights were Double insulated.

Either mains or 12 volt the wire blocks should be in an enclosure, preferably the one supplied with the fittings.

The fittings are a poor choice, nowadays there are better fittings that make it easier to reinstate the insulation to Please Building Regs.

 

[333rocky333]

C types are not generally used in domestic properties, certainly not unless the EFLI satisfies.

C types have a maximum EFLI half that of B types for comparable current values.

Eg, if a B type 10A breaker is 3.68 Ohms, a C type 10A is 1.84 Ohms.

Yes, but if EFLI is ok then why would Dannboi be concerned about this, are you suggesting that domestic EFLI readings are more likely to be unsuitable than a Non domestic envirement and 0.60 ohms for a C40 not acheivable

 

[Hussain Ali]

Better mention their non-compliance with regard to Part L of the building regs.

Can you elaborate on that so I can tell them? Thank you.

 

[333rocky333]

Ban-all-sheds seems to be our clued up resident expert on Building regs regarding Downlights, worth having a scan few a few previous posts.
No doubt hes enjoying a glass of wine and will be along later.

https://www.diynot.com/diy/search/11465147/?q=part+l&o=relevance&c[user][0]=3777

Basically I think Part C as well as Part L is relevant its a lot to do with condensation etc forming in the loft.

 

[securespark]

are you suggesting that domestic EFLI readings are more likely to be unsuitable than a Non domestic envirement and 0.60 ohms for a C40 not acheivable

Possibly, with a TN-S supply.

 

[Hussain Ali]

So just had a conversation with the electrician.

There was apparently some miscommunication. He thought his brother and enclosed all the connections and vice versa (there were two of them). They'll come out to sort it, and also tidy up the wiring.

I mentioned the circuit breaker being under rated. He said it's not a problem because it shouldn't be reaching that sort of current anyway for a 9.5kW shower. I told him it's actually a 10.8kW shower... "Oh right, is it, so do you want that circuit breaker changed then?" I told him yes, and that I'd confirm what I type should be put in.

Is it a B45 MCB I'm after then?

 

[OwainDIYer]

So just had a conversation with the electrician.

There was apparently some miscommunication. He thought his brother and enclosed all the connections and vice versa (there were two of them). They'll come out to sort it, and also tidy up the wiring.

I mentioned the circuit breaker being under rated. He said it's not a problem because it shouldn't be reaching that sort of current anyway for a 9.5kW shower. I told him it's actually a 10.8kW shower... "Oh right, is it, so do you want that circuit breaker changed then?" I told him yes, and that I'd confirm what I type should be put in.

Is it a B45 MCB I'm after then?

The circuit breaker value will be what the electrician calculates it to be, along with the cable size. The electrician is the one signing the design certificate, not you.

So is the electrician's brother also an electrician?

Hopefully his calculations will arrive at a 45A MCB ...

 

[securespark]

There was apparently some miscommunication.

Hmmm...

"Oh right, is it, so do you want that circuit breaker changed then?" I told him yes, and that I'd confirm what I type should be put in.

He should KNOW that!!!!

Owain, Not sure they make a 45 for that board, it may have to be 50.