System and method for suppressing fire in electrical boxes

CAFC
  • US 6,252,167 B1
  • Filed: 02/03/1999
  • Issued: 06/26/2001
  • Est. Priority Date: 02/03/1999
  • Status: Expired due to Term
First Claim
Patent Images

1. A system for suppressing electrical fires, comprising:

  • (a) an electrical box defining an opening for access therein and including therein at least one of an electrical device and an electrical cable;

    (b) a support sized to cover a majority of said opening;

    (c) an intumescent material applied to said support, said intumescent material being capable of expanding by at least 200% when exposed to a temperature in excess of 400°

    F.; and

    (d) said support mounted adjacent to said opening so that said intumescent material covers at least a majority of said opening.

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