Hi,

I see you can buy a conduit bending spring. Does this work with
plastic and metal conduit? What a shame the conduit is 20 or 25mm and
not 22mm otherwise one spring could be used for plumbing and conduit.
I dare say there are proper conduit benders but for one-off use, a
spring is probably the only sensible way forward. Do you use them as
you would with copper pipe: insert spring, bend over knee, and then
bend back slightly to release the spring?

I would have thought that big angles, say 90 degrees, were asking for
trouble: presumably you make the bends as gentle as possible to aid
cable threading?

Is it a good idea to bend conduit or it it better to buy the joins?
The corner pieces usually have a lid that unscrews, which enables you
to help push cables round the corner when installing/removing them.

What if the conduit was buried inside a wall. Wouldn't I need
something behind a blank plate, not only so that I could access the
bend but also to show that the cable changes direction? I thought
there had to be an "accessory" wherever the cable changed direction?

TIA

Fred has brought this to us :
Hi,

I see you can buy a conduit bending spring. Does this work with
plastic and metal conduit?

Plastic only.

You can make bends in steel conduit using a piece of timber with
suitable hole in it. The hole size and shape is critical. It needs to
be tight in width, to prevent the conduit crushing, yet with a slot in
the height to allow it to bend - plus lots and lots of practice.

Do you use them as
you would with copper pipe: insert spring, bend over knee, and then
bend back slightly to release the spring?

Pretty much.

I would have thought that big angles, say 90 degrees, were asking for
trouble: presumably you make the bends as gentle as possible to aid
cable threading?

Yes.


Is it a good idea to bend conduit or it it better to buy the joins?

That will depend upon quantity. The more bends you need, the cheaper
the spring will become.

The corner pieces usually have a lid that unscrews, which enables you
to help push cables round the corner when installing/removing them.

Elbows - they are very tight, but you can also buy less severe 'bends',
with or without inspection covers.

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk

In article ,
Fred wrote:
I see you can buy a conduit bending spring. Does this work with
plastic and metal conduit?

No. Steel conduit requires a mandrel bender.

--
*You are stuck with your debt if you can't budge it*

Dave Plowman London SW
To e-mail, change noise into sound.

Dave Plowman (News) expressed precisely :
No. Steel conduit requires a mandrel bender.

You can actually bend 20mm conduit around your knee, if you are careful
and don't get it too tight.

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk