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Date Posted: 22:49 01/07/06 Sat
Author: Dave Williams
Subject: Re: Fire Wall Box Spacing
In reply to: Rick Thomas 's message, "Fire Wall Box Spacing" on 12:05 01/03/06 Tue

>Is this an NEC rquirent or Building requirment:
>
>Boxes installed in a fire wall must be 24" apart if
>they are installed on oppisite sides of the wall.
>
>If it is an NEC requiremnt does anyone have the code
>reference?
There is a NEC fine print note in 300.21. It is a building code requirement as well. You will also find it in the UL Fire Resistant Directories. This distance can be considerably less if using the right boxes. THe listing on outlet boxes also has this requirement as well. In certain applications it is only a 3" horizontal separation.

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