Grommets or conduit in metal back boxes?

[gembrain]

I've seen a few comments on failed installs because of lack of grommets - although apparently not a specific requirement as such.

Is oval conduit plastered into chase and fed a little into the back box OK or does one HAVE to cut it just short of the the box and fit a grommet?

Granted it's a sharp edge but where the cable comes in at the top of the conduit is the same.

Thanks

 

[valleybilly]

As long as the wire has its double insulation intact & going into the metal back box no grommits are needed .

 

[markythesparky]

As long as the wire has its double insulation intact & going into the metal back box no grommits are needed .

Why do manufacturers make them then?

 

[MDJ]

As long as the wire has its double insulation intact & going into the metal back box no grommits are needed .

I disagree

 

[Andy78]

Why do manufacturers make them then?

Same reason you use condoms. You don't need to sheath your cable in a rubber device, but it can be safer if you do.

 

[Hants-Spark]

As long as the wire has its double insulation intact & going into the metal back box no grommits are needed .

Still not sure how I missed it but on a Part P assessment about 3 years ago the assessor went to a socket and found there was no grommit on the entry, he checked a few others to be sure it wasn't a bad habit I had got in to and then gave me a non compliance which I had to rectify, wouldn't let me do it there and then either, had to fix at a later date and send photo's.

 

[valleybilly]

Why do manufacturers make them then?

For Single insulated wire types

 

[MDJ]

For Single insulated wire types

Again I disagree, where's your spurs lol

 

[valleybilly]

Still not sure how I missed it but on a Part P assessment about 3 years ago the assessor went to a socket and found there was no grommit on the entry, he checked a few others to be sure it wasn't a bad habit I had got in to and then gave me a non compliance which I had to rectify, wouldn't let me do it there and then either, had to fix at a later date and send photo's.

This answer i was given was by ELECSA on my assesment 3weeks ago (ie no grommits needed), O Yer ! i fitted the grommits B4 assesment LOL

 

[valleybilly]

Again I disagree, where's your spurs lol

Where ever i like ! lol

 

[Hants-Spark]

This answer i was given was by ELECSA on my assesment 3weeks ago (ie no grommits needed), O Yer ! i fitted the grommits B4 assesment LOL

Not really sure what your trying to say but I'm with Elecsa and it was them during my assessment that picked me up on it.

 

[MDJ]

This answer i was given was by ELECSA on my assesment 3weeks ago (ie no grommits needed), O Yer ! i fitted the grommits B4 assesment LOL

I'm struggling to think of one type of installation where a metal knockout box designed for domestic installations can be used without a rubber grommet with single pvc cables going into it, if using single pvc cables then conduit would be used to connect to the box and therefore the cables would be protected from the metal hole by a coupler, interested to hear where a single cable entering a metal box could be used without any protection??

 

[valleybilly]

If you striped the outer insulation b4 the metal box its a fail , if its presant after where you fit the gommit then pass !

 

[Redvanman]

Niceic inspectors jump up and down about grommets not being used.
i always use them, good practice and all that, but if you take the conduit into the box I can't see a problem apart from the half wit plasterer pulling the conduit out

 

[markythesparky]

Why do manufacturers make them then?

For Single insulated wire types

But singles would be in conduit and you wouldn't need the grommet as the conduit would be fixed to the box.

 

[MDJ]

but you said for single insulated wires?