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interlocking spill-switches

alan simon
alan simon Member Posts: 4
in THE MAIN WALL
hi for the past thirthy years i have been wiring boilers for various plumbing cos. every once in a while yhe plumber says he needs the spill switches interlocked(more than one boiler in boiler room). in nyc is there any dept or agency that requires this on multiple boilers or any code thanks alan
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