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SOUTHWIRE Thermostat Wire: 18 AWG Conductor Size, 12 Conductors, 250 ft Overall Lg - Nonplenum-Rated Thermostat Wires
SOUTHWIRENonplenum-Rated Thermostat Wires

SOUTHWIRE Thermostat Wire: 18 AWG Conductor Size, 12 Conductors, 250 ft Overall Lg

SKU 3G-OTH-49003

Brand
SOUTHWIRE
Item
Thermostat Wire: 18 AWG Conductor Size, 12 Conductors, 250 ft Overall Lg
Category
Nonplenum-Rated Thermostat Wires
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Technical Specifications

SOUTHWIRE
Manufacturer Part Number
553120407
Overall Lg
250 ft
Volt
150 V
Conductors
12
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SOUTHWIRE Products
3G Electric (S) Pte. Ltd. — Singapore

Frequently Asked Questions

What is Southwire thermostat wire used for?

Southwire thermostat wire connects HVAC thermostats to heating, cooling, and ventilation equipment. Its 18 AWG, 12-conductor design suits multi-stage systems, heat pumps, and zone controls in residential and light commercial buildings.

What are the specifications of Southwire 553120407 thermostat wire?

This Southwire thermostat wire has 18 AWG conductors, 12 conductors total, 250 ft overall length, and a 150 V voltage rating. It is nonplenum-rated, making it suitable for standard indoor installations where plenum-rated cable is not required.

Where to buy Southwire thermostat wire worldwide?

3G Electric supplies Southwire thermostat wire worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this 18 AWG, 12-conductor, 250 ft cable.

How to install Southwire thermostat wire?

Run the wire from thermostat to HVAC equipment, maintaining proper polarity and avoiding sharp bends. Use 18 AWG for low-voltage connections up to 150 V. Follow local codes and manufacturer guidelines for termination and strain relief.

Used in

Common applications for SOUTHWIRE
Commercial construction — Southwire THHN/THWN-2 building wire (750 kcmil) for feeder circuits in conduit systems
Industrial maintenance — Southwire 8 AWG THHN/THWN-2 for motor branch circuits in wet locations
Outdoor job sites — Southwire 50 ft extension cord (12/3 SJTW, L5-20P) for powering 20 A equipment
Fixture wiring — Southwire 18 AWG TFFN wire for control panels and lighting fixtures in dry environments
Temporary power distribution — Southwire 25 ft extension cord (14/3 SJTW) for portable tools on construction sites
Workshop lighting — Southwire AL60CSW LED work light for high-bay illumination in maintenance bays

SOUTHWIRE Products

3G Electric supplies SOUTHWIRE nonplenum-rated thermostat wires. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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