conduit

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Kingpen

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As a maintenance electrician, I never run much conduit. I am trying to learn. I kow how to make a stub up 90 of a certain short length. But what I can't figure out, is how to make a 90, say 85 inches from the end of the pipe. That is a little long to use the [stub up, take up] practice. Is there any other way to figure it.
 
Kingpen said:
As a maintenance electrician, I never run much conduit. I am trying to learn. I kow how to make a stub up 90 of a certain short length. But what I can't figure out, is how to make a 90, say 85 inches from the end of the pipe. That is a little long to use the [stub up, take up] practice. Is there any other way to figure it.
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Measure the 85" make a PENCIL mark. Face the bender toward the short part of the conduit and use the STAR.
 
What kind of conduit and what size? For EMT you can simply add half of the deduction to bend the short side of a long elbow. For example on 3/4" EMT for an 85" elbow you would add 1/2 of the deduction which is 6".

6*1/2=3" so add 3" to your 85 inch elbow 85"+3"=88"

Mark the pipe at 88" and bend it with the long side on the floor.
 
chris kennedy said:
make a PENCIL mark.
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Pencil?

The heck with that, use this...

962403_lg.jpg



:wink:
 
chris kennedy said:
I know your exposed conduit doesn't have marker marks on it. Does it?:confused:
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Mine sure does. I never really cared much about having little Sharpie lines on the pipe. If it was a big deal, and alcohol prep pad from the first aid kit will take them off PDQ.
 
mdshunk said:
Mine sure does. I never really cared much about having little Sharpie lines on the pipe. If it was a big deal, and alcohol prep pad from the first aid kit will take them off PDQ.
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Just run over the mark again with the sharpie and wipe it off before it dries again.
 
Kingpen said:
How would you make that calulation on a electric bender?
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Stub Length – Gain + Deduct = Reverse Bend Mark

Edit to ad: Works for most tangential cam benders e.g. Greenlee 555
 
mdshunk said:
Mine sure does. I never really cared much about having little Sharpie lines on the pipe. If it was a big deal, and alcohol prep pad from the first aid kit will take them off PDQ.
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We run multipule racks out of large electric rooms all the time. Looks pretty crappy with marks all over it. I'm starting another project Monday and I'll bet by noon I'm telling one of my guys again not to use sharpie.

The trick to removing sharpie is to mark over the line a couple times again then quickly rub it off with your thumb. Then quickly wipe your thumb clean on your shirt. When your wife does the laundry, just say,

I have no idea how that happened.:smile:
 
Easiest way to bend pipe is to start with small pipe and a hand bender.

You want to mark your pipe to where the arrow is on the front of the shoe learn the easy way to mark direct.

For 1/2"pipe stick five inches of the tape measure past the end of the pipe and mark your stub length...say 12" inches, and mark it. Put your bender arrow on it, have good foot pressure, and bend your 90.

Doing it this way kills the need to do any math -> otherwise you would measure 12'"inches, subtract five to find your mark etc. keep it simple!

Same for 3/4" except you stick six past inches past the the end of the pipe and mark your number direct.

Same for 1" except the number is now eight inches

If your bending "the other way" (behind you) mark the number on the pipe, stick the star point on it, bend. All done.
 
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Jack Benfield always said to mark with a sharp pencil. Heck, half the time in the dim lighting we work in, I couldn't see a pencil line to save my life.
 
My favorite...

9998210143.jpg

Benfield seems to make the best bender that fits me, and has a good book too.

Greenlee for all bigger pipe (2" and bigger)
 
EMT is thin wall, can be aluminum or cheap alloys, and has no threads, IMC and GRC are rigid pipe and most of the time threaded.



Edit to add - Check article 342 and article344 in the NEC. Now go check article 358, it'll help a lot.
 
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