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In the 2019 edition of NFPA 72, can someone tell me where Figure H.1 came from?

Question asked by neil.hampson on Apr 15, 2019
Latest reply on Apr 15, 2019 by chriscarlson

In the 2019 edition of NFPA 72, can someone tell me where Figure H.1 came from? I have attached a copy.

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