I have a Sylvania electrical service box cat. no. SB20(12-24)C & CG
and am looking for interior assy. (assembly?) 379-500-22.  Do you know
where I can buy the interior assy. 379-500-22?

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Clarification of Question by book_end-ga on 09 Jan 2005 08:11 PST

An electrical box is where the electrical power at the street comes
into the house, passes through a meter and then is fed into a box. 
The box distributes the one line to several lines inside a dwelling.