On Mon, 30 Nov 2009 13:12:01 -0600, "Lloyd E. Sponenburgh"
lloydspinsidemindspring.com wrote:

stryped fired this volley in news:ab7ff1af-1b5d-447a-
:

Is there a way in a conduit run to be able to leave several feet of
"slack" in the wire just in case?

Install a large enough 'j-box' a few feet away from the panel, and coil up
the extra in it. Unless you're running some really big pipe, it's
impractical to double-back on the wire.

Another good thing about placing large pull-boxes in the run more
often than required (after each 360 degrees of bends) is ease of
repair or replacement. You might get the run to be one piece today
(pull both directions from the box in the middle, then loop up the
last 18" of slack in the box) it might not be so easy to pull later.

If you have "reversible" guts in the sub-panel can and you have the
wire entering at the bottom, rather than reversing the guts so the
lugs are at the bottom like the instructions say, you leave the lugs
at the top and run the wires around and up to them.

The Electrical Code folks are going to get up in arms at leaving
that slack in the can - but they aren't the ones who will have to fix
it in the future, you are.

If you ever have a line lug problem and you burn up a few inches of
wire to where it won't reach the top of the can any more.... THEN you
flip the buss to have the lugs at the bottom, and you now have all
kinds of slack.

-- Bruce --