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Per NFPA 780 4.2.1, Is a bolted connection with a listed UL96 brass fittingand copper listed conductor to a bare steel door frame allowed. 

Question asked by BJ Simpson on Dec 14, 2016
Latest reply on Jan 19, 2017 by chriscarlson

Per NFPA 780 4.2.1, Is a bolted connection with a listed UL96 brass fitting and copper listed conductor to a bare steel door frame allowed.  frame has been grinded to bare steel and stud welded for connection to fitting.

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