Does fire alarm cable need to be in conduit?

NFPA and NEC 90 articles state that when installing a fire alarm system, any fire alarm wiring below 7 feet or in non-accessible areas must be installed in a metallic raceway, including behind drywall walls or hard ceiling surfaces. The City of Chicago required systems must be installed entirely in conduit.

Can fire alarm cable be run in cable tray?

Power-limited fire alarm cables are not permitted to be placed in cable trays with electric light, power, Class 1, non-power limited fire alarm, and medium-power network-powered broadband communication circuits unless they are separated by a barrier.

Does fire alarm cable need to be shielded?

If fire alarm cabling does not have other wires or cabling nearby or other sources of electrical interference, you may not need shielding. But in facilities near heavy electrical or mechanical equipment, the interference from these devices might mean you should use shielding to protect the fire alarm cable.

Where installed exposed fire alarm cables shall be?

Cables shall be installed in metal raceways or rigid nonmetallic conduit where passing through a floor or wall to a height of 2.1 m (7 ft.) above the floor, unless adequate protection can be afforded by building construction such as detailed in 760.130(B)(1), or unless an equivalent solid guard is provided.

What cable is used for fire alarm?

BS5839-1 Cable The Standard covers the operation of fire protection systems such as smoke control, emergency lighting, automatic door release, fire alarm systems, voice alarm systems, fire extinguishing systems, and any associated safety measures such as elevator grounding, valve closing, or air handling shutdowns.

How do you install a fire alarm cable?

Instructions

  1. Mark Locations for the Smoke Detector Boxes. Find the best locations for the smoke detectors.
  2. Make Cutouts.
  3. Run NM Cable to the First Box.
  4. Run Cables to Other Boxes.
  5. Insert Cables into Electrical Boxes.
  6. Mount the Boxes.
  7. Install Mounting Plates.
  8. Connect the Smoke Detectors.

How often does cable tray need to be supported?

Cable trays shall be supported by mild steel galvanized brackets at regular intervals of 1.2mm maximum and at 255mm from bends and tees.