- CABLE CONSTRUCTION
- Conductor: The conductors shall be solid, annealed and bare copper with a diameter of AWG23~24 and minimum acceptable diameter shall be 0.485mm.
Inuslation: Each conductor shall be insulated with solid high density polyethylene or FEP(only CMP cable). The insulation shall be uniform and shall not have any defects.
Sheath: The flame retardant PVC or LSZH(Low Smoke Zero Halogen) compound colored grey or other colors shall be applied over the cable core.
- ELECTRICAL PERFORMANCE
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Characteristics Units Specification DC Resistance Ω/100m ≤ 9.38 DC Resistance Unbalance % ≤ 5.00 Capacitance Unbalance
(Pair to Ground)pF/km ≤ 330 Insulation Resistance MΩ-100m ≥ 500 Dielectric Strength DC kV/sec 2.5 / 2 Impedance (Characteristic mean)
Ω 100 ± 15% (1 ≤ f ≤ 250MHz) Return Loss dB/100m ≥ 20 + 5 * log(freq) , 1 ≤ f ＜ 10MHz
≥ 25 , 10 ≤ f ＜ 20MHz
≥ 25 – 7 * log(freq/20) , 20 ≤ f ≤ 250MHzAttenuation
(Insertion Loss)dB/100m ≤ 1.808*√(freq) + 0.017*(freq) + 0.20/√(freq)
, 1 ~ 250 MHzNEXT Loss dB/100m ≥ 44.3 – 15*log(freq/100) , 1 ~ 250MHz Power sum NEXT Loss dB/100m ≥ 42.3 – 15*log(freq/100) , 1 ~ 250MHz ELFEXT Loss dB/100m ≥ 27.8 – 20*log(freq/100) , 1 ~ 250MHz Power sum ELFEXT Loss dB/100m ≥ 24.8 – 20*log(freq/100) , 1 ~ 250MHz Propagation Delay dB/100m ≤ 534 + 36 / √(Freq) , 1 ~ 250MHz Propagation Delay Skew dB/100m ≤ 45
- FLAME REQUIREMENTS
- A cable marked CMX shall comply with the VW-1 flame test specified in section 1080 of UL 1581 or IEC 60332-1.
A cable marked CM shall comply with the vertical flame test specified in UL 1685 or IEC 60332-3.
A cable marked CMR shall comply with the riser test specified in UL 1666.
A cable marked CMP shall comply with the CMP test specified in NFPA 262.