Fire Alarm Wire | McMaster-Carr

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About Wire and Cable

Compare wire vs. cable and choose the right option based on gauge, number of conductors, insulation, and current rating.

Duct-Rated Fire Alarm Cable

Also known as plenum cable, this FPLP cable has low-smoke insulation and can be used without conduit in duct work and above a drop ceiling. The insulation is also flame resistant for use in critical circuits such as fire alarm systems and smoke detectors.

Unshielded—Use unshielded cable in applications where signal interference is not a concern.

Shielded—Shielded cable has a layer of foil that blocks signal interference from nearby equipment and devices. It has an uninsulated ground wire that is not counted in the number of wires.

					Outer Jacket		Inner Insulation
	AWG	No. of Wires	Cable AWG	OD	Material	Color	Material	Color	Temp. Range, ° F	Features	Cable Designation	Certification		10 ft. Long	25 ft. Long	50 ft. Long	100 ft. Long	250 ft. Long
Unshielded Solid Wire







				300V AC/300V DC

				18	2	18/2	0.15"	PVC	Red	PVC	Black, Red	0 to 165	—	FPLP	UL Listed	8435T21	000000	000000	000000	000000	0000000


				18	4	18/4	0.18"	PVC	Red	PVC	Black, Green, Red, Yellow	0 to 165	—	FPLP	UL Listed	8435T23	00000	00000	00000	00000	—


				Shielded Solid Wire







								300V AC/300V DC

								18	2	18/2	0.16"	PVC	Red	PVC	Black, Red	32 to 165	Uninsulated Ground Wire	FPLP	UL Listed	8435T22	00000	00000	00000	00000	000000

Riser-Rated Fire Alarm Cable

This FPLR cable is approved for use in vertical shafts and large facilities with multiple levels. It has flame-resistant insulation for use in critical circuits such as fire alarm systems and smoke detectors.

Unshielded—Use unshielded cable in applications where signal interference is not a concern.

Shielded—Shielded cable has a layer of foil that blocks signal interference from nearby equipment and devices. It has an uninsulated ground wire that is not counted in the number of wires.

					Outer Jacket		Inner Insulation
	AWG	No. of Wires	Cable AWG	OD	Material	Color	Material	Color	Temp. Range, ° F	Features	Cable Designation	Certification		10 ft. Long	25 ft. Long	50 ft. Long	100 ft. Long	250 ft. Long
Unshielded Solid Wire







				300V AC/300V DC

				18	2	18/2	0.13"	PVC	Red	PVC	Black, Red	0 to 140	—	FPLR	ETL Listed	8435T41	00000	000000	000000	000000	000000


				18	4	18/4	0.15"	PVC	Red	PVC	Black, Green, Red, Yellow	0 to 140	—	FPLR	ETL Listed	8435T43	00000	00000	00000	00000	—


				Shielded Solid Wire







								300V AC/300V DC

								18	2	18/2	0.15"	PVC	Red	PVC	Black, Red	0 to 140	Uninsulated Ground Wire	FPLR	ETL Listed	8435T42	00000	00000	00000	00000	—