EMT Offset

[Little Bill]

Just for a simple rule of thumb, how much do you add to the length to EMT with two box offsets?
Say you have two boxes and you want 15' of EMT between boxes, how much would you add to the length for the shrinkage? Its been a while since I ran any EMT.

 

[LarryFine]

I would cut the EMT after making the offsets.

 

[electrofelon]

Its been a while since I ran any EMT.

Well get out the bender and tell us what you get! I dont deduct anything for 2 box offsets.

 

[Fred B]

Depends on the Rise and degree of the bends.

 

[Little Bill]

Depends on the Rise and degree of the bends.

Just a simple box offset in a straight run of EMT between two fixed boxes.

 

[Fred B]

About half way down the page there is a chart

EMT Conduit Bending Guide | Pipe-Pal Tools & Accessories Inc

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[electrofelon]

About half way down the page there is a chart

Yeah pretty negligible. IT says 10 degrees is 1/16 shrink for an inch of rise. I bend offsets at 10 degrees (marks at 1.5" and 4.75") . A box offset is what about 1/2"? so 1/16 shrink for two of 'em.

 

[Little Bill]

I have a chart somewhere but just wanted a rule of thumb without digging for the chart. I seldom had to use box offsets between two boxes. It was usually just straight down from above a ceiling to one box with a single offset.
I was guessing at about 1/8" to 1/4" of shrinkage.