seal off class 1 div1

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New member
Just a sanity check on some low voltage dc fire alarm devices and conduit in rated room, the conduit entering the room is sealed just outside entry point w/in 18" and there are 4 rated devices within hazard, does the conduit entry to each device need to be sealed also? Would these falled under enclosure description for switches etc?


Senior Member
You'll need to install to meet the design of your devices and your classification. Is it Div. 1 or Div. 2? There FA strobes and horns that are factory sealed, Div 1 approved and no seal would be required at device. Some may be Div.2 approved and can't be installed in a Div. 1 area. A typical, general purpose smoke detector can't go in a hazardous area.

You may have intrinsically safe pull stations that would require a completely separate raceway system, but the devices would not need a seal.

Low voltage does not mean it is safe for hazardous areas. Know your design before you establish your installation methods.
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