crawlspace cables, and slimline breakers

Old 10-28-03, 11:57 AM
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crawlspace cables, and slimline breakers

You folks are a great help. Thanks I throw another couple of questions at you:

Can cables in crawlspaces (not "useable" space) be fastened to the bottom of joists, or must they be fasted the same as in more accessible spaces--to the sides, or through holes in the joists?

AND...Is there any disadvantage to using slimline breakers? What might be some indicators that it's time to go for a bigger box, or for a sub-panel?
Old 10-28-03, 02:50 PM
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I would say the cables still need to be run though bored holes. The code just considers exposed work and does not diferentiate between usable and unusable spaces. As to the second part, panels are rated as to the number of circuits they can support. A large 200 A panel might be approved for 40 spaces. Each slimline breaker is considered two devices. Therefore, you might be over-utilizing your panel. The number of allowed circuits should be on a label inside the panel.
Old 10-28-03, 03:05 PM
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If the cables are 8/3 or 6/2 or larger, then you may staple them directly to the bottom of the joists. Otherwise, you need to run them thru bored holes in the joists. Or you can attach a "running board", which is typically a length of 1x pine, to the bottom of the joists and staple the cables to it. These methods all assume that your locality permits exposed cable. You will want to check first, but you may need to run conduit.

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