CMR Wire | McMaster-Carr

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23 Products

About Wire and Cable

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

Riser-Rated Communication and Security System Cable

This cable is designated CL3R and CMR, so it has flame-resistant insulation and is approved for use in low-current circuits in vertical shafts and large facilities with multiple levels. It’s often used in intercoms, speakers, and security systems.

Unshielded Stranded Wire

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

					Outer Jacket		Inner Insulation
	AWG	No. of Wires	Cable AWG	OD	Material	Color	Material	Color	Temp. Range, ° F	Cable Designation	Certification	Specs. Met		10 ft. Long	25 ft. Long	50 ft. Long	100 ft. Long	250 ft. Long
300V AC/300V DC



		22	6	22/6	0.16"	PVC	Gray	PVC	Black, Blue, Brown, Green, Red, White	0 to 140	CMR, CL3R	ETL Listed, C-ETL Listed	—	8280T33	000000	000000	000000	000000	0000000


		22	8	22/8	0.17"	PVC	Gray	PVC	Black, Blue, Brown, Green, Orange, Red, White, Yellow	0 to 140	CMR, CL3R	ETL Listed, C-ETL Listed	—	8280T34	00000	00000	00000	00000	000000
		22	12	22/12	0.23"	PVC	Gray	PVC	Beige, Black, Blue, Brown, Gray, Green, Orange, Pink, Purple, Red, White, Yellow	0 to 140	CMR, CL3R	—	UL 444	8280T35	00000	00000	00000	00000	000000
		18	2	18/2	0.14"	PVC	Gray	PVC	Black, Red	0 to 140	CMR, CL3R	ETL Listed, C-ETL Listed	—	8280T36	0000	00000	00000	00000	00000
		18	3	18/3	0.15"	PVC	Gray	PVC	Black, Red, White	0 to 140	CMR, CL3R	ETL Listed, C-ETL Listed	—	8280T37	00000	00000	00000	00000	000000
		18	4	18/4	0.18"	PVC	Gray	PVC	Black, Green, Red, White	0 to 140	CMR, CL3R	ETL Listed, C-ETL Listed	—	8280T38	00000	00000	00000	00000	000000
		18	6	18/6	0.21"	PVC	Gray	PVC	Black, Blue, Brown, Green, Red, White	0 to 140	CMR, CL3R	ETL Listed, C-ETL Listed	—	8280T39	00000	00000	00000	00000	000000
		16	2	16/2	0.17"	PVC	Gray	PVC	Black, Red	0 to 140	CMR, CL3R	ETL Listed, C-ETL Listed	—	8280T41	0000	00000	00000	00000	000000
		16	4	16/4	0.2"	PVC	Gray	PVC	Black, Green, Red, White	0 to 140	CMR, CL3R	ETL Listed, C-ETL Listed	—	8280T42	00000	00000	00000	00000	000000
		14	2	14/2	0.22"	PVC	Gray	PVC	Black, Red	0 to 140	CMR, CL3R	ETL Listed, C-ETL Listed	—	8280T43	00000	00000	00000	00000	000000

Shielded Stranded Wire

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
300V AC/300V DC



		22	2	22/2	0.13"	PVC	Gray	PVC	Black, Red	0 to 140	Uninsulated Ground Wire	CMR, CL3R	ETL Listed, C-ETL Listed	8233T31	00000	000000	000000	000000	000000


		22	4	22/4	0.15"	PVC	Gray	PVC	Black, Green, Red, White	0 to 140	Uninsulated Ground Wire	CMR, CL3R	ETL Listed, C-ETL Listed	8233T32	0000	00000	00000	00000	00000
		22	8	22/8	0.19"	PVC	Gray	PVC	Black, Blue, Brown, Green, Orange, Red, White, Yellow	0 to 140	Uninsulated Ground Wire	CMR, CL3R	ETL Listed, C-ETL Listed	8233T33	00000	00000	00000	00000	000000
		18	2	18/2	0.15"	PVC	Gray	PVC	Black, Red	0 to 140	Uninsulated Ground Wire	CMR, CL3R	ETL Listed, C-ETL Listed	8233T34	00000	00000	00000	00000	000000
		18	3	18/3	0.19"	PVC	Gray	PVC	Black, Red, White	0 to 140	Uninsulated Ground Wire	CMR, CL3R	ETL Listed, C-ETL Listed	8233T35	00000	00000	00000	00000	000000
		18	4	18/4	0.2"	PVC	Gray	PVC	Black, Green, Red, White	0 to 140	Uninsulated Ground Wire	CMR, CL3R	ETL Listed, C-ETL Listed	8233T36	00000	00000	00000	00000	000000
		18	6	18/6	0.23"	PVC	Gray	PVC	Black, Blue, Brown, Green, Red, White	0 to 140	Uninsulated Ground Wire	CMR, CL3R	ETL Listed, C-ETL Listed	8233T37	00000	00000	00000	000000	000000
		16	2	16/2	0.19"	PVC	Gray	PVC	Black, Red	0 to 140	Uninsulated Ground Wire	CMR, CL3R	ETL Listed, C-ETL Listed	8233T38	00000	00000	00000	00000	000000
		16	4	16/4	0.22"	PVC	Gray	PVC	Black, Green, Red, White	0 to 140	Uninsulated Ground Wire	CMR, CL3R	ETL Listed, C-ETL Listed	8233T39	00000	00000	00000	000000	000000
		14	2	14/2	0.22"	PVC	Gray	PVC	Black, Red	0 to 140	Uninsulated Ground Wire	CMR, CL3R	ETL Listed, C-ETL Listed	8233T41	00000	00000	00000	00000	000000

Ethernet Cable


Unshielded	Shielded

Shielded

Send data between computers, printers, servers, and switches. Ethernet category standards describe the cable’s performance capabilities. Higher category numbers mean faster speeds, superior data transfer, and better signal strength. Category cables are backward compatible, so you can mix and match, but your speed will only be as fast as the lowest-rated cable.

Unshielded—Unshielded cable is the choice for day-to-day wiring, such as connecting your desktop computer to an ethernet port.

Shielded—Shielded cable has a layer of foil that blocks signal interference from nearby equipment, such as variable frequency drives or small motors. It has an uninsulated ground wire that is not counted in the number of wires.

CMR Cable—CM and CMR cable prevent the spread of flames down the length of the cable. CMR is more flame resistant than CM cable.

										Inner Insulation					Per Ft.
	Ethernet Cable Category	Transmission Freq., MHz	AWG	No. of Wires	Cable AWG	Max. Temp., ° F	OD	Cable Designation	Outer Jacket Material	Material	Color	Choose an Outer Jacket Color	Choose a Length, ft.		1-499	500-Up
Unshielded Solid Wire



		3	16	24	8	24/8	140	0.16"	CMR	PVC	PVC	Blue Blue/White Brown Brown/White Green Green/White Orange Orange/White	Gray	25, 50, 100, 500, 1,000	3447T2	00000	00000


		6	100	23	8	23/8	165	0.22"	CMR	PVC	Polyolefin	Blue Blue/White Brown Brown/White Green Green/White Orange Orange/White	Black, Blue, Gray, Green, White, Yellow	25, 50, 100, 500, 1,000	8245K31	0000	0000


		Shielded Solid Wire with Uninsulated Ground Wire



				6	250	23	8	23/8	140	0.29"	CMR	PVC	Polyolefin	Blue Blue/White Brown Brown/White Green Green/White Orange Orange/White	Blue, Gray	25, 50, 100, 500, 1,000	4265T5	0000	0000