20mm Plastic Trunking

[Risteard]

Of course it is.

No. It's not.

Why do you think they manufacture expansion couplers? And why do you think IET/IEE Guidance Note 3 makes reference to their use?

 

[rsgaz]

Why do you think they manufacture expansion couplers?

Are they for people who are planning on trying to 'get away' with doing a 12m continuous run with no terminal boxes?

They have their place, I'll grant you, but a normal coupler will suffice in 99% of applications, as long as some thought is put into it, as my maths proves.

And why do you think IET/IEE Guidance Note 3 makes reference to their use?

I can only see a single reference to "Provision for expansion and contraction" relating to non-metallic rigid conduit, not specific products or types.

 

[Risteard]

I can only see a single reference to "Provision for expansion and contraction" relating to non-metallic rigid conduit, not specific products or types.

Look in the checklist.

 

[ban-all-sheds]

And why do you think IET/IEE Guidance Note 3 makes reference to their use?

Whereabouts in GN3?

 

[Risteard]

Whereabouts in GN3?

Don't have a copy on me at present. Will get back to you with the page number early next week when I am in the company of that publication next. (I have all Guidance Notes etc. but certainly don't keep them in the van.)

 

[ban-all-sheds]

Thanks.

 

[ban-all-sheds]

Don't have a copy on me at present. Will get back to you with the page number early next week ....

Any news?

 

[Risteard]

Any news?

Sorry I completely forgot. Will have a look when I have access to the book again (which will probably be the weekend or start of next week).

Send me a reminder over the weekend.

 

[ban-all-sheds]

Reminder over a weekend, if not the one.

 

[securespark]

I have a dreadful confession to make. I first lifted a tool to do electrical work for profit in 1983.

I have fitted hundreds of metres of all kinds of round conduits, including PVC, both inside and out.

I have never used expansion couplings. I have never seen any deterioration in the conduit work, including some that I installed outside at my current residence nearly 20 years ago.

 

[ban-all-sheds]

With some assistance from Risteard we'll find out what GN3 says about their use.

 

[securespark]

522.1.1 (green book) is a general reference that wiring systems must be suitable for lowest and highest ambient temperatures.

 

[JohnW2]

522.1.1 (green book) is a general reference that wiring systems must be suitable for lowest and highest ambient temperatures.

Indeed - and your experiences seem to indicate that that can be achieved without the use of expansion couplings.

Kind Regards, John

 

[ban-all-sheds]

Sorry I completely forgot. Will have a look when I have access to the book again (which will probably be the weekend or start of next week).

Send me a reminder over the weekend.

And another weekend rolls around.

 

[Notch7]

Would hituf (hi-tuff) cable be suitable for clipping to a wall externally instead of conduit......