Consumer Unit Replacement

[davelx]

I just seen these but got no idea what 0.5 or 1.0 ET

http://www.ring-plug-thread-gages.com/PDChart/British-Electrical-thread-data.html

 

[Gazzer23]

I just found this very comprehensive catalogue which seems to have every kind of adaptor and they even have ones for 5/8" but based in USA I think.

http://updates.clipsal.com/clipsalonline/files/brochures/cms0004.pdf

So I could use a 5/8" male to 16mm female adaptor to screw into the existing conduit.

Adaptor1

• Gazzer23
• 2 Mar 2018

Then a 16mm nipple so now I have 16mm female

Adaptor2

• Gazzer23
• 2 Mar 2018

And then a metric reducer 20mm male to 16mm female

Adaptor3

• Gazzer23
• 2 Mar 2018

And then a standard 20mm conduit coupler to connect my 20mm conduit.


It seems like a bit too much too me

 

[ban-all-sheds]

I just seen these but got no idea what 0.5 or 1.0 ET is, but look at the price £999 each

They are out of stock.

Often the quickest and easiest way to tweak a web catalogue to deal with unavailability (assuming you expect it to come back into stock) is to make it a mad price.

Do you know anywhere where you could get a little bit of custom machining done?

If an M16 thread on ⅝" tube doesn't work you could get 16mm tube and have someone turn one end down to ⅝", you could put a thread on that to go into your existing couplers, and then no probs with M16 thread on the other end.

 

[Gazzer23]

I was looking at custom CNC the other night, there are several places in China that do it but I suspect they require reasonable quantities.

That is a very good idea, I just need to find someone with a lathe.
There is a miniature railway club that we take our little boy to and they got lots of sheds with lathes etc to build their trains, maybe I could get someone there to turn down a tube if it turns out to be necessary but I think I should just be able to tap my 5/8" conduit with a 16mm die and then the 20mm to 16mm reducers I have now ordered will be fine.

I do believe that the difference is very minimal and the 0.2mm diameter difference won't effect the thread as it is a 0.1mm difference for the thread since on both sides of the tube.
I suppose I better order that 16mm die set now and try it.

 

[ban-all-sheds]

There is a miniature railway club that we take our little boy to and they got lots of sheds with lathes etc to build their trains, maybe I could get someone there to turn down a tube if it turns out to be necessary

That's the sort of thing people who play with tools like that would love to do.

 

[JohnW2]

I do believe that the difference is very minimal and the 0.2mm diameter difference won't effect the thread as it is a 0.1mm difference for the thread since on both sides of the tube.

As I've said, that would be my suspicion/expectation/hope. The thread depth of an M16 (coarse) male thread is about 1.23mm, so the 0.2mm difference is, as you say, not an enormous proportion of that.

Kind Regards, John

 

[Gazzer23]

Looking at M16 dies, I see there are several types x 2, x 1.5 which refers to the thread pitch.
The 20 mm to 16 mm reducer doesn't state what thread pitch it uses, I thought it would be the coarse one of 2 mm pitch that is used but then I found one in Australia which states it uses 1.5 mm pitch.

I am learning a lot of things thanks to all your help on this forum.
I find it very interesting with the different thread specs etc, I never realised there were so many.

 

[ban-all-sheds]

They are like standards in IT - there are enough for everybody to have their own.

 

[ban-all-sheds]

Looking at M16 dies, I see there are several types x 2, x 1.5 which refers to the thread pitch.
The 20 mm to 16 mm reducer doesn't state what thread pitch it uses, I thought it would be the coarse one of 2 mm pitch that is used but then I found one in Australia which states it uses 1.5 mm pitch.

My stock & dies are in the loft, and I'm sorry, but I'll be b******d if I'm going up there now.

Someone whose are more accessible can look at theirs, where I'm sure the die will say on it which pitch it is. I suspect it's the fine one.

 

[ban-all-sheds]

I find it very interesting with the different thread specs etc, I never realised there were so many.

And the very first standard thread the world ever knew was.....

British Standard Whitworth

 

[Risteard]

I just found this very comprehensive catalogue which seems to have every kind of adaptor and they even have ones for 5/8" but based in USA I think.

http://updates.clipsal.com/clipsalonline/files/brochures/cms0004.pdf

So I could use a 5/8" male to 16mm female adaptor to screw into the existing conduit.

Adaptor1

• Gazzer23
• 2 Mar 2018

Then a 16mm nipple so now I have 16mm female

Adaptor2

• Gazzer23
• 2 Mar 2018

And then a metric reducer 20mm male to 16mm female

Adaptor3

• Gazzer23
• 2 Mar 2018

And then a standard 20mm conduit coupler to connect my 20mm conduit.


It seems like a bit too much too me

You would need a coupler (and stock and die) for the 5/8" rather than a nipple to mate a male connection.

 

[Risteard]

My stock & dies are in the loft, and I'm sorry, but I'll be b******d if I'm going up there now.

Someone whose are more accessible can look at theirs, where I'm sure the die will say on it which pitch it is. I suspect it's the fine one.

1.5

 

[securespark]

16mm nipple

Oh, Matron!

Sorry, had to do it...

 

[ban-all-sheds]

1.5

...I suspect it's the fine one.

 

[ban-all-sheds]

16mm nipple

Is that British Standard Chapel Hat Peg?