Guest John Posted February 12, 2018 Report Share Posted February 12, 2018 How many sounder circuits are required on a four zone system across three floors. Quote Link to comment Share on other sites More sharing options...
AnthonyB Posted February 12, 2018 Report Share Posted February 12, 2018 No less than 2. The number of sounder circuits is dictated in part by the loading. If you use a 2 wire system you would in effect have 4 circuits. Quote Link to comment Share on other sites More sharing options...
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