Other-than-Cardinal Conduit Elbows

Status
Not open for further replies.
drcampbell

drcampbell

Senior Member
Location
The Motor City, Michigan USA
Occupation
Registered Professional Engineer
Other than the local custom muffler shop, can anybody recommend a source of non-standard conduit elbows?
I might need to specify a 56.3° elbow. (to match an 8:12 roof pitch)
 
Any electrical contractor with a bender for that size conduit should be able to make that bend.
With a muffler shop you have to make sure that the bend radius is not less than the minimum permitted in Chapter 9, Table 2.
 
drcampbell said:
I might need to specify a 56.3° elbow. (to match an 8:12 roof pitch)
Click to expand...
If you can get (2) 30s and are OK with a small out of plane offset, you can do that easily:

Use the (2) 30s to make a 60, put it on your plumb conduit and point it along the roof gradient. The angle will be too shallow and the conduit would hit the roof. Now rotate the elbow-elbow joint so the uphill end is as a steeper angle (less bend off plumb), while rotating the elbow-conduit joint so that the uphill end is still pointing along the roof gradient. Shouldn't take much adjusting to get from 60 degrees to 56.3 degrees.

You could obviously do that with a 45 and a 22.5 instead, but it will take more adjusting and give you a larger out of plane offset.

Obviously not as pretty or elegant as a custom bend, but quite simple and perhaps good enough for a roof.

Cheers, Wayne
 
Back when I was a first year, I told my foreman with pride that I had learned to bend 1/2" EMT pretty accurately with a hand bender.

He pooh-poohed that and said any journeyman could bend EMT with his knee. 😟:cry::poop: Perhaps all you need is a knee. :)
 
Your supply house should have a camtrac or the sort...
Make the bend with 1/2" or even a length of solid gec wire, then any good bender can match your angles... no need to mention 56.3°
 
drcampbell said:
Other than the local custom muffler shop, can anybody recommend a source of non-standard conduit elbows?
I might need to specify a 56.3° elbow. (to match an 8:12 roof pitch)
Click to expand...

Have to laugh. You never heard of bending conduit? ANY competent mechanic in this trade should be able to do that with a stick of conduit with his eyes closed. I for one would never use factory ells unless absolutely necessary.

-Hal
 
hbiss said:
Have to laugh. You never heard of bending conduit? ANY competent mechanic in this trade should be able to do that with a stick of conduit with his eyes closed. I for one would never use factory ells unless absolutely necessary.

-Hal
Click to expand...
It is not real easy to bend large size rigid without a good machine.
 
A muffler shop will not be able to bend our stuff, regardless...it will be dimpled and crushed! If it isnt a emt/grc shoe, it will destroy it..
 
petersonra said:
Some muffler shops are set up to bend some pretty serious pipe.
Click to expand...
Not as serious as my pipe... plus they have the wrong stuff. If you want to have them bend your stuff then have at it... but- for what its worth, even they use the bone wire to transfer their bends...
Ask me how i know!
 
rambojoe said:
Not as serious as my pipe... plus they have the wrong stuff. If you want to have them bend your stuff then have at it... but- for what its worth, even they use the bone wire to transfer their bends...
Ask me how i know!
Click to expand...
I don't know we never tried having pipe bent by a muffler shop we always had it done by the pipe place up the street.
 
Status
Not open for further replies.
Top