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Chapter Twelve
and chilled water lines are generally prohibited even though they may
be welded or have no joints in the room.
The NEC has stringent requirements when it comes to being able
to shut off all electrical service in a motor control cabinet with a single
disconnect. Yet some mechanical control circuits may interface with
the electric power circuits and present a voltage of remote origin. The
HVAC designer must work closely with the electrical designer to sat-
isfy the needs of both disciplines.
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