Thermostat Wire

1. It is usually difficult to find solid (non-stranded) wire in cables with more than two conductors when the wires are 20 gauge or larger. This is because cables get stiff and difficult to work with due to the solid conductors. Apparently this doesn't bother the HVAC installers. (I guess ducting tin is even more stiff!)
2. The color coding is unique in the cabling industry. In order: White, red, green, blue, yellow, brown, orange.
3. It is not paired, and requires unusual wire counts: 5 and 7 conductors.

• 18 Gauge Solid Conductor Wire
  • 2 Conductor ("millivolt" heat only systems or damper motor control)
  • 5 Conductor (Standard HVAC systems)
  • 7 Conductor (Typical heat-pump systems)

18 Gauge Solid Conductor Wire

18 gauge thermostat cable is adequate for practically any residential application.

CAROL A Division of General Cable 18 Gauge Thermostat Wire; 2, 5, & 7 Conductor	Manufacturer and jacket color may vary.
300 volt UL Type CL2 Annealed solid copper per ASTM B3 Premium grade color coded PVC insulation PVC jacket, white Temperature range: -20°C - +105°C Jacket marking: CAROL AWG TYPE CL2 (UL) 105°C SUNLIGHT RESISTANT - MADE IN USA Applications: Thermostat control, heating and air conditioning installations, touchplate systems, burglar alarms, intercom systems, doorbells annunciator and bell systems, remote control units, signal systems, other low-voltage installations. Color codes: 2 Conductor: White, Red 5 Conductor: White, Red, Green, Blue, Yellow 7 Conductor: White, Red, Green, Blue, Yellow, Brown, Orange Packaging: 2 Conductor: 500' spool 5 Conductor: 250' spool 7 Conductor: 250' spool
GE-05582 Thermostat wire,18/2,500ft WHILE SUPPLIES LAST!!!! List 128.91 spool/500ft 7.56 lbs/spool/500ft $120.99 spool/500ft Special: $44.95   Enter Qty spool/500ft