Tugger sizing

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You need to do a pulling tension calculation. There an online calculator here. It is not completely user friendly, and you have to do each segment one at a time, using the ending pulling tension as the starting tension for the next segment.
Also make sure you look at the side wall pressure calculation. That is the crushing force against the insulation as you pull around the bends. In most cases this, and not the actual pulling tension, is the limiting factor on a pull. The side wall pressure can be decreased by using larger radius bends.
 
don_resqcapt19 said:
You need to do a pulling tension calculation. There an online calculator here. It is not completely user friendly, and you have to do each segment one at a time, using the ending pulling tension as the starting tension for the next segment.
Also make sure you look at the side wall pressure calculation. That is the crushing force against the insulation as you pull around the bends. In most cases this, and not the actual pulling tension, is the limiting factor on a pull. The side wall pressure can be decreased by using larger radius bends.
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Or buy your wire from Southwire and ask them. :)
 
controlled said:
I'm trying to rent a tugger and have been asked the tonnage I need
I'm pulling a set if (3) 3/O. 450 feet with 4 90's

How do I determine the size needed
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first, order simpull. pull it dry. now, what size is the conduit?

if you are using simpull, any commercial tugger will be sufficient.
the little maxis tuggers will work fine, and they are only 3,000#

with simpull and a small maxis tugger, i've pulled three 500 mcm aluminum
with a ground 650' in a 4" conduit, dry. the strain guage on the footpedal
briefly showed 1,000# going around the last 90.

it showed 0# for the pull. not even enough to tickle it to 500#, the minimum
that shows on the gauge.
 
Fulthrotl said:
first, order simpull. pull it dry. now, what size is the conduit?

if you are using simpull, any commercial tugger will be sufficient.
the little maxis tuggers will work fine, and they are only 3,000#

with simpull and a small maxis tugger, i've pulled three 500 mcm aluminum
with a ground 650' in a 4" conduit, dry. the strain guage on the footpedal
briefly showed 1,000# going around the last 90.

it showed 0# for the pull. not even enough to tickle it to 500#, the minimum
that shows on the gauge.
Click to expand...

Yup, I pulled 12,000 feet of 350 aluminum with 5 men in 4.5 hours that was 15 conduits. simpull is the bomb.
 
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