CMR Cable | McMaster-Carr

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23 Products

About Wire and Cable

Unshielded

Shielded

Use For:
Unshielded: Data; Category 3 can also be used for Telephones
Shielded, Double Shielded: Data, Interference Shielding
Flexible
Insulation:
Outer: PVC Plastic
Inner: See table

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

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.

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 Frequency	Wire Ga.	No. of Wires	Cable AWG	Max. Temp., °F	OD	Industry Designation	Material	Color	Choose an Outer Insulation Color	Length, ft.		1-499	500-Up
Unshielded Solid Wire
3	16 MHz	24	8	24/8	140°	0.16"	CMR	PVC Plastic	Blue Blue/White Brown Brown/White Green Green/White Orange Orange/White	Gray	25, 50, 100, 500, 1,000	000000	00000	00000
6	100 MHz	23	8	23/8	165°	0.22"	CMR	Polyolefin Plastic	Blue Blue/White Brown Brown/White Green Green/White Orange Orange/White	Black, Blue, Gray, Green, White, Yellow	25, 50, 100, 500, 1,000	0000000	000	000
Shielded Solid Wire with Uninsulated Ground Wire
6	250 MHz	23	8	23/8	140°	0.29"	CMR	Polyolefin Plastic	Blue Blue/White Brown Brown/White Green Green/White Orange Orange/White	Blue, Gray	25, 50, 100, 500, 1,000	000000	000	000

Riser-Rated Communication and Security System Cable

Unshielded

Shielded

Use For:
Unshielded: Buildings
Shielded: Buildings, Interference Shielding
Flexible
Temperature Range: 0° to 140° F
Insulation: PVC Plastic

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.

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

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

Unshielded Stranded Wire
Wire Ga.	No. of Wires	Cable AWG	OD	Outer Insulation Color	Inner Insulation Color	Features	Industry Designation	Specifications Met		10 ft.	25 ft.	50 ft.	100 ft.	250 ft.
300V AC/300V DC
22	6	22/6	0.16"	Gray	Black, Blue, Brown, Green, Red, White	__	CMR, CL3R	ETL Listed, C-ETL Listed	0000000	00000	000000	000000	000000	000000
22	8	22/8	0.17"	Gray	Black, Blue, Brown, Green, Orange, Red, White, Yellow	__	CMR, CL3R	ETL Listed, C-ETL Listed	0000000	00000	00000	00000	00000	000000
22	12	22/12	0.23"	Gray	Beige, Black, Blue, Brown, Gray, Green, Orange, Pink, Purple, Red, White, Yellow	__	CMR, CL3R	UL 444	0000000	00000	00000	00000	00000	000000
18	2	18/2	0.14"	Gray	Black, Red	__	CMR, CL3R	ETL Listed, C-ETL Listed	0000000	0000	00000	00000	00000	00000
18	3	18/3	0.15"	Gray	Black, Red, White	__	CMR, CL3R	ETL Listed, C-ETL Listed	0000000	0000	00000	00000	00000	00000
18	4	18/4	0.18"	Gray	Black, Green, Red, White	__	CMR, CL3R	ETL Listed, C-ETL Listed	0000000	00000	00000	00000	00000	000000
18	6	18/6	0.21"	Gray	Black, Blue, Brown, Green, Red, White	__	CMR, CL3R	ETL Listed, C-ETL Listed	0000000	00000	00000	00000	00000	000000
16	2	16/2	0.17"	Gray	Black, Red	__	CMR, CL3R	ETL Listed, C-ETL Listed	0000000	0000	00000	00000	00000	000000
16	4	16/4	0.2"	Gray	Black, Green, Red, White	__	CMR, CL3R	ETL Listed, C-ETL Listed	0000000	00000	00000	00000	00000	000000
14	2	14/2	0.22"	Gray	Black, Red	__	CMR, CL3R	ETL Listed, C-ETL Listed	0000000	00000	00000	00000	00000	000000
Shielded Stranded Wire
300V AC/300V DC
22	2	22/2	0.13"	Gray	Black, Red	Uninsulated Ground Wire	CMR, CL3R	ETL Listed, C-ETL Listed	0000000	0000	00000	00000	00000	00000
22	4	22/4	0.15"	Gray	Black, Green, Red, White	Uninsulated Ground Wire	CMR, CL3R	ETL Listed, C-ETL Listed	0000000	0000	00000	00000	00000	00000
22	8	22/8	0.19"	Gray	Black, Blue, Brown, Green, Orange, Red, White, Yellow	Uninsulated Ground Wire	CMR, CL3R	ETL Listed, C-ETL Listed	0000000	0000	00000	00000	00000	000000
18	2	18/2	0.15"	Gray	Black, Red	Uninsulated Ground Wire	CMR, CL3R	ETL Listed, C-ETL Listed	0000000	00000	00000	00000	00000	000000
18	3	18/3	0.19"	Gray	Black, Red, White	Uninsulated Ground Wire	CMR, CL3R	ETL Listed, C-ETL Listed	0000000	0000	00000	00000	00000	000000
18	4	18/4	0.2"	Gray	Black, Green, Red, White	Uninsulated Ground Wire	CMR, CL3R	ETL Listed, C-ETL Listed	0000000	00000	00000	00000	00000	000000
18	6	18/6	0.23"	Gray	Black, Blue, Brown, Green, Red, White	Uninsulated Ground Wire	CMR, CL3R	ETL Listed, C-ETL Listed	0000000	00000	00000	00000	00000	000000
16	2	16/2	0.19"	Gray	Black, Red	Uninsulated Ground Wire	CMR, CL3R	ETL Listed, C-ETL Listed	0000000	00000	00000	00000	00000	000000
16	4	16/4	0.22"	Gray	Black, Green, Red, White	Uninsulated Ground Wire	CMR, CL3R	ETL Listed, C-ETL Listed	0000000	00000	00000	00000	00000	000000
14	2	14/2	0.22"	Gray	Black, Red	Uninsulated Ground Wire	CMR, CL3R	ETL Listed, C-ETL Listed	0000000	00000	00000	00000	00000	000000