SWA to Switch?

[Colin33]

I'm joking about the book of course, but I have to admit, the last time I looked at one of these books was during my half day 17th update all those years ago

Anyhow, that must be a massive gland to fit two 25mm's through! Surely too big to fit in a 25mm knockout?

 

[Sintra]

I'm joking about the book of course, but I have to admit, the last time I looked at one of these books was during my half day 17th update all those years ago

Anyhow, that must be a massive gland to fit two 25mm's through! Surely too big to fit in a 25mm knockout?

That enclosure will happily take a 38mm gland possibly even a 50mm. I would say you would get 2 x 25mm tails into a 32mm.

 

[Darkwood]

How ever you you enter the box with your tails if they are exposed they need to be double insulated and restrained in some manner so any external movement on the cable will not act directly on the terminations... can you not terminate into a 25mm metal through box and bush it to the box running the cores straight through and tapping of the box for earth?

 

[Colin33]

I may just opt for the grommet, got plenty of those... Thanks for the suggestion though, I was trying to work with what I already had but it makes for more sense to splash out on one of these for a much neater job! Even better if I can take the tails out of the top of the unit, with the swa entering at the bottom...

 

[Colin33]

How ever you you enter the box with your tails if they are exposed they need to be double insulated and restrained in some manner so any external movement on the cable will not act directly on the terminations... can you not terminate into a 25mm metal through box and bush it to the box running the cores straight through and tapping of the box for earth?

Not sure what you mean there... are we talking about the tails here?

 

[CockneyReject]

That enclosure will happily take a 38mm gland possibly even a 50mm. I would say you would get 2 x 25mm tails into a 32mm.

32mm stuffers bang on, will let 2 x 25mm tails and a 16mm earth out no problem and iirc on the Wylex 110M's it's a 32mm knock out so jobs a good'un for our clueless OP and is ALOT neater than a grommet

 

[Colin33]

Oi Oi Oi ! Clueless... thanks cockney reject

 

[Darkwood]

Splashing out!!!... a stuffing gland of the correct size maybe a quid at that, drill a bigger hole if necessary, you sound very defeative tbh .. if it makes the job look more professional then spend a few quid extra ... if its your own house then its not really an issue as long as its functional and safe.

 

[Colin33]

I meant on the switch, not the gland!!
It's not my own house but what stated as a relatively simple layout has got bigger and bigger and I'm running out of space on the wall!! Already have all the sola PV stuff, then a supply to a sauna, and now another to a seperate 'cabin' outside.... it's tricky getting a neat n tidy layout when things are added all the time... a bit like adding another circuit to an already neatly stuffed CU ;-)

 

[CockneyReject]

Oi Oi Oi ! Clueless... thanks cockney reject

your welcome mate

like darkwoods already said a 32mm stuffer ain't a lot of money and if a Wylex units too pricey for you CEF do a metal clad range for not a lot of money and a 32mm hole saws not going to break the bank either, why be defeated by something so simple?

 

[NickD]

Set of very fine hole saws currently on sale in either Aldi or Lidl for a tenner

 

[dazza1981]

Yeah and after doing 2 holes they have less teeth than most of the chumps on the jeremy kyle show

 

[shanky887614]

I'm sure the reg for ferrous enclosures was still included in that version. The reg number in the current edition which you should be using is 521.5.1

Turn it into a figure of 8 and no problem

 

[Colin33]

Get out of it CR... I'm not defeated! If I was I wouldn't be here asking for opinions would I? I've seen things done in all sorts of different ways, so it's nice to ask how others deal with such situations, especially when you normally work for yourself and don't have a whole company of experience to draw on. I think my wholesalers only keep the 'Basics' range in stock so that's all I'll be able to pick up in the morning. I don't reckon they have a 32mm knockout either...so it may have to be a grommet out of a 25mm hole.

 

[shanky887614]

Get out of it CR... I'm not defeated! If I was I wouldn't be here asking for opinions would I? I've seen things done in all sorts of different ways, so it's nice to ask how others deal with such situations, especially when you normally work for yourself and don't have a whole company of experience to draw on. I think my wholesalers only keep the 'Basics' range in stock so that's all I'll be able to pick up in the morning. I don't reckon they have a 32mm knockout either...so it may have to be a grommet out of a 25mm hole.

Just use grommet strip then.

They should have that on the shelf

a heat gun makes it a lot easier to apply with the thicker stuff

 

[Sintra]

Turn it into a figure of 8 and no problem

No problem electrically with doing that but it's a bit unsightly on the outside of an enclosure. Also compromises IP ratings if on the top surface.

 

[Colin33]

Set of very fine hole saws currently on sale in either Aldi or Lidl for a tenner

Our chippy swears by Lidl drill bits... and he normally moans about just about everything!!

 

[shanky887614]

No problem electrically with doing that but it's a bit unsightly on the outside of an enclosure. Also compromises IP ratings if on the top surface.

personally I would rather have them coming out same hole.

ive got a 12-38mm cone cutter in bag so no probs for me with hole too small (if I need bigger then 52mm step cutters are availible)

 

[Colin33]

No problem electrically with doing that but it's a bit unsightly on the outside of an enclosure. Also compromises IP ratings if on the top surface.

Just on the top surface??

 

[NickD]

Yeah and after doing 2 holes they have less teeth than most of the chumps on the jeremy kyle show

Poor technique mate