Bending 20mm Round Electrical Conduit
 

I've seen installations where this type of conduit has been bent at 90
degree's and at various angles.

My question is how is this done ? Do you have to gently warm the
conduit to do this ? Must the conduit be supported on the inside so
that it doesn't collapse ?

It must be possible but I need to know how ?

TIA

Andy.

Bending 20mm Round Electrical Conduit
 

wrote in message
ups.com...
I've seen installations where this type of conduit has been bent at
90
degree's and at various angles.

My question is how is this done ? Do you have to gently warm the
conduit to do this ? Must the conduit be supported on the inside so
that it doesn't collapse ?

It must be possible but I need to know how ?

TIA

Andy.


A conventional pipe bender can be used on black metal or galvanised
conduit - (you need the correct sized former though). Plastic conduit
comes in two 'weights' thick and thin walled. The thick walled variety
can be bent with a pipe bender, but the thin walled variety needs an
internal spring. With either weight of plastic conduit you get far
more 'spring back' than with metal conduit, and it varies quite a bit
from make to make, so you have to 'bend further' than you would for
metal. Be aware that the thin walled type will often show the spring
pattern on the outside after bending.

AWEM

Bending 20mm Round Electrical Conduit
 

In article . com,
wrote:
I've seen installations where this type of conduit has been bent at 90
degree's and at various angles.

My question is how is this done ? Do you have to gently warm the
conduit to do this ? Must the conduit be supported on the inside so
that it doesn't collapse ?

It must be possible but I need to know how ?

What sort of conduit - steel or plastic?

--
*When you've seen one shopping centre you've seen a mall*

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

Bending 20mm Round Electrical Conduit
 

In article ,
Andrew Mawson wrote:
A conventional pipe bender can be used on black metal or galvanised
conduit - (you need the correct sized former though).

I used to have a conduit bender (Hilmore) and it's rather different from a
copper pipe one. Unfortunately none of the bits from the same maker could
be swapped to have just one for both. The conduit one didn't use a top
former but a shaped roller. And although at first glance the 'frame'
looked the same it wasn't in practice. Could be another maker was more
sensible, though.

--
*The early bird gets the worm, but the second mouse gets the cheese *

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

Bending 20mm Round Electrical Conduit
 

"Dave Plowman (News)" wrote in message
...
In article ,
Andrew Mawson wrote:
A conventional pipe bender can be used on black metal or
galvanised
conduit - (you need the correct sized former though).

I used to have a conduit bender (Hilmore) and it's rather different
from a
copper pipe one. Unfortunately none of the bits from the same maker
could
be swapped to have just one for both. The conduit one didn't use a
top
former but a shaped roller. And although at first glance the 'frame'
looked the same it wasn't in practice. Could be another maker was
more
sensible, though.

--
*The early bird gets the worm, but the second mouse gets the cheese
*

Dave Plowman London SW

I have a very comprehensive Record pipe bender with all the metric and
Imperial formers for both copper and gas barrel, however the formers
from my old Hilmor bender fit it exactly. Usually for steel pipe you
have the female former to bend round, and the 'puller' has a grooved
wheel to run on the outside of the tube, however with the old style of
steel conduit that was bent from plate and not electically welded
along the join not only did you have to use a 'U' guide bar under the
puller, but also you had to be very careful where the pipe seem was
relative to the bend direction or it opened up.

AWEM

Bending 20mm Round Electrical Conduit
 

wrote in message
ups.com...
I've seen installations where this type of conduit has been bent at 90
degree's and at various angles.

My question is how is this done ? Do you have to gently warm the
conduit to do this ? Must the conduit be supported on the inside so
that it doesn't collapse ?

Thick wall PVC conduit can be bent using a hot air gun. Don't get it too
close, particularly with white, which can discolour. Play the gun along the
whole length of the bit you want to bend, turning the conduit to get the
heat even. When it starts to droop, it can be curved to shape and left to
cool on a hard surface. You may need to press gently on the sides to get it
round. If it kinks, you are trying to get too small a radius and should use
a solvent weld inspection bend or elbow instead. I've used this for many
difficult locations, including a double curve bringing a pair of conduits
down one face of a 4" square post and turning them so that one feeds a
socket on each of the two adjacent faces.

Colin Bignell

Bending 20mm Round Electrical Conduit
 

In article ,
"nightjar" nightjar@insert my surname here.uk.com writes:

Thick wall PVC conduit can be bent using a hot air gun. Don't get it too
close, particularly with white, which can discolour. Play the gun along the
whole length of the bit you want to bend, turning the conduit to get the
heat even. When it starts to droop, it can be curved to shape and left to
cool on a hard surface. You may need to press gently on the sides to get it
round. If it kinks, you are trying to get too small a radius and should use
a solvent weld inspection bend or elbow instead. I've used this for many

You can buy preformed swept bends too.

difficult locations, including a double curve bringing a pair of conduits
down one face of a 4" square post and turning them so that one feeds a
socket on each of the two adjacent faces.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

Bending 20mm Round Electrical Conduit
 

On Thu, 30 Aug 2007 05:18:21 -0700, mused:

I've seen installations where this type of conduit has been bent at 90
degree's and at various angles.

My question is how is this done ? Do you have to gently warm the
conduit to do this ? Must the conduit be supported on the inside so
that it doesn't collapse ?

It must be possible but I need to know how ?

PVC conduit you'd use a bending spring on the inside of the bend. The
tube does need to be warm, but not hot air gun warm. Rubbing it with
your hand in a rude manner warms it up enough.

Steel conduit you'd use a floor standing pipe bender, Hilmor would be
the tool of choice here.
--
Regards,
Stuart.

Bending 20mm Round Electrical Conduit
 

On Thu, 30 Aug 2007 21:50:51 -0700, "cerberus"
mused:


"Lurch" wrote in message
.. .
On Thu, 30 Aug 2007 05:18:21 -0700, mused:

I've seen installations where this type of conduit has been bent at 90
degree's and at various angles.

My question is how is this done ? Do you have to gently warm the
conduit to do this ? Must the conduit be supported on the inside so
that it doesn't collapse ?

It must be possible but I need to know how ?

snip

Rubbing it with your hand in a rude manner warms it up enough.



Regards,
Stuart.

Ah, the 'good old days' when an apprenticeship was an apprenticeship! :-))

Heh, 1997 was when I finished mine.
--
Regards,
Stuart.

Bending 20mm Round Electrical Conduit
 

"Lurch" wrote in message
...
On Thu, 30 Aug 2007 05:18:21 -0700, mused:

I've seen installations where this type of conduit has been bent at 90
degree's and at various angles.

My question is how is this done ? Do you have to gently warm the
conduit to do this ? Must the conduit be supported on the inside so
that it doesn't collapse ?

It must be possible but I need to know how ?

snip

Rubbing it with your hand in a rude manner warms it up enough.



Regards,
Stuart.

Ah, the 'good old days' when an apprenticeship was an apprenticeship! :-))

Don.

Bending 20mm Round Electrical Conduit
 

Rubbing it with your hand in a rude manner warms it up enough.



Regards,
Stuart.

Ah, the 'good old days' when an apprenticeship was an apprenticeship! :-))

Don.

Finally got round to having a go at bending my plastic conduit. Bought
myself a bending spring as below:

http://www.drapertools.co.uk/Pages/Pagesource/p286.pdf

Part no was 71359.

Although the blurb stated it was for bending conduit with an
*internal* diameter of 20mm it worked fine for my conduit bought from
Wickes/B&Q which had an outer diameter of 20mm.

Sure enough heating with a heat gun was too much and the rude rubbing
method worked a treat!

Managed to bend at 90 degrees as well as adding kinks etc to get round
obstacles.

Thanks to everyone for their help with this.