conduit coupler?

[musicspark]

Is anyone familiar any different or older methods of joining conduit other than with threaded ends and couplers?

I have come across some old conduit that has what I can best describe as a raised bevel at the end rather than a thread

never come across it before

 

[wozz]

you can get knock on couplers but these are not older they are used where u have no hope of getting stocks in there to cut a thread, older split rolled stuff had joiners and tees that just had a screw that gripped the conduit (a bit), thats all i have seen, and im not quite sure what a raised bevel is.

 

[netblindpaul]

Could you not get a flaring/swaging tool that you hit down the bore that enlarged the end so that you could then slide one tube inside the other?

Think a pvc conduit coupler being formed in the end of the tube by hammering a specially shaped plug down the tube and stretching it then taking it out?

 

[septiclecky]

you can get knock on couplers but these are not older they are used where u have no hope of getting stocks in there to cut a thread, older split rolled stuff had joiners and tees that just had a screw that gripped the conduit (a bit), thats all i have seen, and im not quite sure what a raised bevel is.

I remember a similar type which I got told it was called slip conduit as the tees and joints slipped on to the conduit then a screw was tightened bringing the edges of tee/joint together

 

[Evans Electric]

Never heard of conduit with a bevelled end TBH. There are couplers with a bevelled end that take a lead washer, a serrated washer and a long reach bush.

 

[M107]

The old imperial/metric reducers are bevelled?

 

[netblindpaul]

M107,

I carry these on my van, don't ask!

My comment relates to somewhere in the seriously din and dark pastseeing a piece of conduit formed like that on the end without the thread in it?

 

[musicspark]

M107,I carry these on my van, don't ask!

My comment relates to somewhere in the seriously din and dark pastseeing a piece of conduit formed like that on the end without the thread in it?

The building in question has been empty for over 30 years

 

[exbdc]

Can I assume that these would give the conduit no IP rating?

 

[ProDave]

Can I assume that these would give the conduit no IP rating?

And probably no good to be used as the CPC either?

Having said that I did a CU change on a conduit wired house a while back where the conduit was the CPC and the CPC tested okay, but a visual inspection in the loft showed the couplers were those open ones that just clamp around the outside of the conduit. I was genuinely surprised it tested okay for earth continuity.

 

[netblindpaul]

Dave,

Just a Q, i guess you used a low current low resistance ohm meter, like a multi function etc.?

Do you think that the connections would have held up under the high current test which seems to have lost favour these days?

BTW does anyone have a high current earth tester?