Cat6 CMP Plenum-Rated Patch Cord (550 MHz, 23 AWG Solid, NFPA 262, FT6)

Overview

A cat6 cmp plenum rated patch cord is bought to satisfy an inspector, not a network engineer. If the space above a drop ceiling, below a raised floor, or inside an air return carries building air, then anything installed there has to meet the plenum flame and smoke requirements written into the electrical code. CMP is the marking the inspector looks for, and no amount of category performance substitutes for it.

Key Specifications

What the plenum rating actually covers

A plenum is any space used for moving environmental air — the void above a suspended ceiling when it is part of the return path, the cavity under a raised floor, the inside of an air duct. Cable in that space is tested for how far a flame travels along it and how much smoke it gives off, which is what the plenum test method measures. The requirement appears in the National Electrical Code and is enforced locally, so the authority having jurisdiction has the final word on what is acceptable on your job.

CMP, CMR, CM and CMG compared

These markings say where a cable may be installed, and they are ranked. A cable with a higher marking may be used where a lower one is required; the reverse is not true.

Two practical notes from that table. Specifying CMP everywhere is the safe default on a mixed job because it is always acceptable, but it costs more per meter. And the rating has to be on every part of the channel people can see — the patch cord, the jack, and the cable in the ceiling.

Where the code requires it

• Above suspended ceilings used as a return-air plenum
• Under raised floors in data centers and trading floors
• Inside HVAC ducts and air-handling rooms
• Any space the local inspector classes as an air-handling plenum
• Campus and government projects with a written cable specification

Solid or stranded in a plenum run

Solid conductor is the normal choice for the permanent link inside the plenum: lower attenuation, and it is terminated once into a jack and never touched again. Stranded is the choice for the patch cord at the faceplate, because that one gets plugged and unplugged. Where a project wants the plenum rating on the patch cord as well, we build it on plenum-rated jacket with the same conductor you would expect at the wall, and the marking is printed on the jacket so it survives inspection.

Typical applications for this cat6 cmp plenum rated patch cord

• Office fit-outs with a return-air ceiling plenum
• Data center raised-floor runs, alongside our Cat6A Shielded Patch Cord
• Hospital and campus projects with a written cable spec
• Air-handling rooms and fan rooms
• Government and education work where the inspector checks jacket markings

How to specify your build

1. Marking required — CMP, CMR or CM, as the specification and the AHJ define it.
2. Conductor — solid for the permanent link, stranded for patching.
3. Length and color.
4. Wiring — T568B default.
5. Boot — standard, or long-body for recessed ports.
6. Documentation — what the project file expects to see.

Workmanship and testing

Assembly and inspection follow IPC/WHMA-A-620 Class 3 workmanship criteria under our ISO 9001 quality management system, and every unit is 100% continuity and pinout tested before it is packed. Conductor range is 32 to 12 AWG. Jacket marking and print legibility are checked on the first article. Where a standard sets a limit for the category, the connector interface or the jacket, that is the industry-general definition of the rating. The values your assembly is built and verified to are the ones stated on your drawing, per order.

Every production run can ship with RoHS and REACH declarations and the electrical report agreed at quotation; see certifications and material declarations. UL styles and other named approvals are built to drawing: we source to the style you specify and document it, rather than asserting a listing we do not hold. This assembly is built on the four lines covered under cable assembly and wire harness production, with nothing in the build handed to an undisclosed subcontractor. Related reading: what automation programs ask for. Tooling is quoted separately, cut in-house rather than brokered out, and owned by you.

Custom builds and ordering

Cat6 CMP Plenum-Rated prototype lots start from 1 to 50 pcs and ship in 3 working days. Production requires 500 pcs and runs 14 working days after approval. Your part number and labeling go on OEM and ODM Cat6 shipments, and material certificates plus first-article reports are available. New tooling adds about 10 working days, and we hold 100 sets of mold tooling in house.

Related plenum and Cat6 assemblies

• Cat5e CMP Plenum Patch Cord
• Cat5e UTP LSZH Patch Cord
• Cat6A Shielded Patch Cord, S/FTP 26 AWG
• Cat6 UTP Patch Cord
• Cat6A UTP Patch Cord, 28 AWG
• Custom Shielded Ethernet Data Cable

Full range: Ethernet patch cord range.

Frequently Asked Questions