Extron STP20P/1000 (part number 22-159-03) — a 1,000 ft plenum spool of single-pair 20 AWG shielded control and audio cable.

This is the heavy-copper plenum member of the Extron STP Series: one twisted pair of 20 AWG tinned copper conductors, 0.038 in each, insulated in foamed FEP and jacketed in blue fire-resistant PVC that carries an NEC CMP listing. The larger conductor size is what integrators reach for when a control or audio home run is long enough that voltage drop and loop resistance start to matter, and the plenum jacket lets that same run pass through an air-handling ceiling without conduit. A full aluminum foil shield and a bonded tinned copper drain wire complete the build.

Key Capabilities

• 20 AWG tinned copper pair at 0.038 in (0.97 mm) per conductor for long-distance runs.
• NEC CMP and C(UL) 60 °C ratings for installation in return-air plenums.
• Foamed FEP insulation, PVC inner jacket, blue fire-resistant PVC outer jacket.
• Aluminum foil shield at 100 percent coverage plus a bonded tinned copper drain wire.
• Nominal overall diameter of 0.135 in (3.43 mm) and 45 ohms nominal impedance.
• 1,000 ft (304.8 m) self-dispensing spool weighing 15 lb, with sequential footage markings.

Where It Is Used

Campus-scale and multi-floor installs where plenum construction is mandatory and the cable still has to reach: distributed audio in airports and stadiums, hospital paging and nurse-call adjacent AV, university lecture buildings, and control trunks between equipment rooms and remote racks.

Specifications at a Glance

• Conductors: 1 shielded twisted pair, 20 AWG tinned copper, 0.038 in (0.97 mm)
• Nominal core OD 0.050 in (1.27 mm); nominal overall OD 0.135 in (3.43 mm)
• Jacket: blue fire-resistant PVC, plenum; NEC CMP, C(UL) 60 °C
• Standard length 1,000 ft (304.8 m); shipping weight 15 lb (6.8 kg)

Also referenced as Extron STP20P1000, STP20P-1000, part number 2215903.