261-10-2250 Type SP-OS, Type ITC/PLTC, 50 Shielded Pairs - 20 AWG - 105 Deg. C
Conductors: Bare soft annealed copper, Class B, 7-strand concentric per ASTM B-8.
Insulation: Flame-retardant Okoseal® (PVC) per UL Standard 13 and 2250, 15 mils nominal thickness, 105°C temperature rating.
Conductor Identification: Pigmented black and white in pairs, black, red and white in triads. Pair or triad assembled with left-hand lay.
Group Shield: Aluminum/Polyester tape overlapped to provide 100% coverage, and a 7-strand tinned copper drain wire, two sizes smaller than the conductor. All group shields are completely isolated from each other.
Communications Wire: 22 AWG, solid, bare copper conductor, 12 mils nominal flame-retardant Okoseal insulation, 105°C rating.
Assembly: Pairs or triads assembled with left hand lay. Fillers included where required to provide a round cable.
Cable Shield: Aluminum/Polyester tape over-lapped to provide 100% coverage, and a 7-strand tinned copper drain wire, same size as the conductor.
Jacket: Black, flame-retardant, low temperature Okoseal®(PVC) per UL 13 and UL Standard 2250. A rip cord is laid longitudinally under the jacket to facilitate removal.
Classifications: UL Listed as ITC/PLTC - Instrument Tray Cable/Power Limited Tray Cable for use in accordance with Article 727 and Article 725 of the National Electrical Code.
Cables comply with UL 2250 and UL 13 for PLTC, CL2 and CL3.
Okonite® Type SP-OS (Pair/triad - Individual and Overall Shield) instrumentation cables are designed for use as instrumentation, process control, in ITC non-classified or labeled circuits up to 150 volts and 5 amps (750VA) and in Class 2 or 3 Power-Limited circuits where maximum shielding against external interference is required, as well as shielding among groups, particularly where the cable may be subject to abnormally high current or voltage interference; indoors or outdoors; in wet or dry locations with conductor operating temperatures up to 105°C; in cable trays; in raceways; supported by a messenger wire; under raised floors. Suitable Class I, Division 2, Class II, Division 2, or Class III, Division 2 hazardous locations. Also for use as Power-Limited fire protective signaling cable (FPL) per NEC Code 760.
The isolated individual shields over each pair, when properly grounded, prevent crosstalk or capacitive coupling between adjacent pairs which occurs with ac signals, particularly the pulse type.
The overall shield eliminates most of the static interference from the electrical field radiated by power cables and other electrical equipment.
- Passes the UL 13 and IEEE 383-1974 vertical tray flame tests.
- Passes IEEE 1202 vertical tray flame test (8 pr #18 and 4 pr #16 & larger).
- Sunlight & oil resistant.
- Individual pairs or triads are completely isolated.
- 100% shield coverage for reduced electromagnetic noise pick-up.
- Good external noise rejection.
- Excellent weathering characteristics.
- OSHA Acceptable.
- Flexible, easy to handle and terminate.
- Communication wire included in each cable for voice communication during installation or instrument calibration.
- Suitable for low temperature installation of -40°C.