KSM SERIES - OVERALL FOIL SCREENED SOLID CONDUCTOR MULTIPAIR CABLE (BBC PSN types)
These cables, to a BBC specification, have single solid conductors, twisted in pairs and overall foil screens with drain wire. They are suitable for permanent installations where screens are terminated on a bus arrangement, such as jackfields and IDC type blocks. They have a relatively low impedance (they were designed before digital audio was invented) and are not suitable for digital audio circuits.
Note: As this cable design is always used in fixed installations, it has been replaced by KSM-LFH. This type has a low smoke zero halogen construction.
Technical Specification:
| BBC specification: |
PSN10/3M (KSM5), PSN20/4M (KSM10), PSN40/2M (KSM20), PSN50/3M (KSM25) |
| Construction: |
Twisted to form pairs, than laid-up with overall Melinex tape |
| Voltage rating: |
750V dc |
| Conductors: |
1/0.5mm (0.2mm²) tinned copper wire |
| Current rating: |
1A |
| Insulation: |
PVC. For colours see technical data section |
| Screen: |
Aluminium or aluminium/polyester tape |
| Drain wire: |
1/0.5, (0.22mm²) tinned copper |
| Overall jacket: |
PVC, cream |
| Overall diameter: |
6.3mm (KSM5), 7.6mm (KSM10), 10.2mm (KSM20), 10.8mm (KSM25) |
| Conductor resistance: |
98 ohms/km |
| Weight: |
4.7kg/100m (KSM5), 8.4kg/100m (KSM10), 15.1kg/100m (KSM20), 17.0kg/100m (KSM25) |
| Reel length: |
100m, 500m |
| Cut lengths: |
Available in any multiple of 1 metre |