Fire Retardant Grommets

[Dustydazzler]

Agree whole heartedly.

However BS7671is not always our only requirement to follow.

Often with big companies/councils there are adopted working practices which are the result of personal preference, which is fine if agreed to in advance.

Whats annoying is where you are not made aware of these foibles, don't do them and they try to make out its "best practice" or "in the regs".

BS7671 is only guidance , so if pish came to shove saying it’s a regulation to use metal glands over plastic isn’t technically accurate...

 

[davesparks]

Inspector from Council I done work for, it also states that cable entry points should be adequately sealed it’s a grey area but one which I unfortunately got made a mug out of. He had a couple of pages printed out in front of me and the main boss I can try and find them now and send the link IET I think it was from
[automerge]1598142923[/automerge]

View attachment 60337

In which case it sounds like it might be the councils specification and not a part of BS7671.

 

[westward10]

Inspector from Council I done work for, it also states that cable entry points should be adequately sealed it’s a grey area but one which I unfortunately got made a mug out of. He had a couple of pages printed out in front of me and the main boss I can try and find them now and send the link IET I think it was from
[automerge]1598142923[/automerge]

View attachment 60337

At no point in the Regulation quoted does it state any of that. The intention is not to contain any fire, if it were then the enclosure would have to be constructed for this purpose but it is not.

 

[Midwest]

You could always follow Wylex gimmick, and install intumescent pads inside your CU.

 

[nicebutdim]

You could always follow Wylex gimmick, and install intumescent pads inside your CU.

View attachment 60351

Even the wholesalers didn't fall for those. They're available from basically nowhere.

 

[David Prosser]

Your meant to be using these flame retardant grommets rather than open grommets to comply with regs.

no I’m not.

 

[nicebutdim]

Am I right in stating that the requirement to leave gaps no greater than 1mm in the top horizontal surface of CUs would generally preclude the use of open grommets, but that nowhere in BS7671 is there any stated requirement for those gaps to be filled or reduced through the use of any flame/fire resistant/retardant material?

 

[davesparks]

Am I right in stating that the requirement to leave gaps no greater than 1mm in the top horizontal surface of CUs would generally preclude the use of open grommets, but that nowhere in BS7671 is there any stated requirement for those gaps to be filled or reduced through the use of any flame/fire resistant/retardant material?

The requirement is to maintain the specified IP rating, which is different to just not leaving gaps greater than 1mm.

But otherwise yes, that pretty much the gist of it.

 

[Grant1987]

The requirement is to maintain the specified IP rating, which is different to just not leaving gaps greater than 1mm.

But otherwise yes, that pretty much the gist of it.

I wish I had known all this a year ago I was like a rabbit in the headlights but good to know the exact requirements now ?