- 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. The insulation shall be uniform and shall not have any defects. The diameter over the insulation shall be maximum 1.22mm.
Screen: The aluminum tape coated on one side with plastic film shall be applied over the cable core for screening on jacketing process.
Sheath: The flame retardant PVC or LSZH(Low Smoke Zero Halogen) compound colored grey orother colors shall be applied over the screening.
- ELECTRICAL PERFORMANCE
-
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.– The LSZH(CMX) product comply with CPR reaction to fire : Eca