CMP-LP
CMP-LP is a NEC / UL (USA) cable designation: C = Communications cable; M = Multipurpose rating (reading by usage, UNVERIFIED); P = Plenum; LP = Limited power: rated current per conductor printed, for power over Ethernet (NEC 2023); CMP-LP = Communications cable, plenum rated (low smoke, FEP insulation), limited power (LP): marked with the current per conductor for PoE. 300 V, 75 C. UL 444; NEC 800.179(A).
2 coding systems recognise this code
NEC / UL (USA)
| Symbol | Meaning |
|---|---|
C | Communications cable |
M | Multipurpose rating (reading by usage, UNVERIFIED) |
P | Plenum |
LP | Limited power: rated current per conductor printed, for power over Ethernet (NEC 2023) |
CMP-LP | Communications cable, plenum rated (low smoke, FEP insulation), limited power (LP): marked with the current per conductor for PoE. 300 V, 75 C. UL 444; NEC 800.179(A) |
NBN
| Symbol | Meaning |
|---|---|
C | Rubber (Caoutchouc), Natural Or Synthetic, Insulation Or Sheath |
M | Medium Load / Insulation (500 V; 450/750 V In The 2011 Catalogue) |
P | Paper Insulation And Lead Sheath |
L | Light Load / Insulation (300 V; 300/500 V In The 2011 Catalogue) |
P | Paper Insulation And Lead Sheath |
Fire behaviour (EU CPR)
Low-smoke compound (CMP-LP). Smoke is graded s1 to s3 on the EN 50399 ladder; s1a and s1b add the 3 m cube test EN 61034-2.
A CPR class is declared by the maker in its Declaration of Performance and printed on the sheath (EN 50575 cl 7). This decoder does not assign one. What the CPR classes mean →
Sources: EN 13501-6 draft and FprEN 50575:2014 final draft (drafts, not the published texts); IEC 60332-3-24:2000+A1:2008; EN 13501-3 draft A2.