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#79180 - 11/29/01 08:15 PM 10 ft tap rule
aldav53 Offline
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Registered: 08/22/01
Posts: 545
Loc: Chandler, AZ USA
From my understanding, with this rule you don't need to fuse the feeders of a sub panel less than 10 ft. There is usually no extra lugs to tap off a main panel, so you have to fuse them with a breaker anyway. Am I thinking right?
(Just thought about the 25ft tap rule, have to look it up).
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#79181 - 12/01/01 10:34 AM Re: 10 ft tap rule
electure Offline


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Registered: 12/24/00
Posts: 4259
Loc: Fullerton, CA USA
There are so many variables in this question that it's hard to respond.
{240.21(B)(1)}If you have a conductor to a subpanel less than 10'long, that conductor does not have to be protected at its ampacity. It can be 1/10 of the ampacity of the OCPD that feeds it.
{408.16}The subpanel, however cannot be protected by a larger OCPD than its rating, so it would have to be protected by a main breaker or a OCPD in the main panel if the sub's rated at less than the main panel's OCPD.
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#79182 - 12/05/01 06:01 PM Re: 10 ft tap rule
bdaddyc1 Offline
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Registered: 12/05/01
Posts: 4
aldav53, they do make panels that have a main breaker at the top for the feeds and have lugs at the botom of the panel to feed a sub panel which is a main lug panel sitting next to the main panel, so in a way the tap is just a continuation of the buss bars
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