Extron STP20-2/1000 (part number 22-161-03) — 1,000 ft of two-pair 20 AWG shielded control and audio cable, the heaviest-copper non-plenum spool in the Extron STP Series.

Four 20 AWG tinned copper conductors are grouped into two twisted pairs, color coded red/black and green/white, and wrapped with a tinned copper drain wire inside an aluminum foil shield. That combination gives an integrator two independent low-impedance circuits on a single pull — typically a bidirectional serial control link plus a balanced audio path — with enough conductor mass to hold signal quality over the long distances a 1,000 ft spool implies. Polypropylene insulation, PVC inner jackets and a gray PVC outer jacket finish the cable at 0.230 in nominal diameter.

Key Capabilities

• Two shielded twisted pairs of 20 AWG tinned copper, 0.038 in (0.97 mm) per conductor.
• Color-coded red/black and green/white pairs for clear identification at both ends.
• Aluminum foil shield at 100 percent coverage with a tinned copper drain wire.
• Non-plenum gray PVC jacket rated NEC CM and C(UL) 60 °C; 45 ohms nominal impedance.
• Largest cross-section in the series at 0.230 in (5.84 mm) nominal outside diameter.
• 1,000 ft (304.8 m) self-dispensing spool, 40 lb shipping weight, sequential footage markings.
• Compliant with the European Union RoHS and WEEE directives.

Where It Is Used

Long, dual-circuit runs in ordinary construction: multi-room corporate AV, university lecture buildings, legislative and courtroom systems, stadium and arena control trunking, and hospital or command-center racks where a control processor and an audio device sit far apart and share a pathway.

Specifications at a Glance

• Conductors: 2 shielded twisted pairs, 20 AWG tinned copper, 0.038 in (0.97 mm)
• Nominal core OD 0.070 in (1.78 mm); nominal overall OD 0.230 in (5.84 mm)
• Jacket: gray PVC, non-plenum; NEC CM, C(UL) 60 °C
• Standard length 1,000 ft (304.8 m); shipping weight 40 lb (18.1 kg)

Also referenced as Extron STP2021000, STP20-2-1000, part number 2216103.