HEATCONTROLLERMARS84203 MARS-84203 Thermostat Cable

Product Description

The HEATCONTROLLERMARS84203 MARS-84203 is an 18-gauge, 4-conductor thermostat cable supplied on a 250-foot spool. It is designed for low-voltage thermostat wiring in residential and light commercial HVAC systems. The cable provides the multiple signal conductors needed to connect a thermostat to a furnace, air handler, or heat pump control board. HVAC technicians and installers pull this cable during new construction and retrofit work where thermostat runs require a reliable, code-acceptable wiring solution.

This thermostat cable is suited for typical low-voltage control wiring applications in forced-air heating and cooling systems. The 250-foot spool length supports multiple thermostat runs from a single spool, reducing material waste on larger jobs. It is commonly used in residential single-family homes, light commercial tenant spaces, and multi-family buildings where standard 18-gauge low-voltage wiring is specified.

Key Features

• 18 AWG, 4-conductor configuration supports standard thermostat control wiring
• 250-foot spool provides ample length for multiple runs or long single pulls
• UL listed for low-voltage thermostat wiring applications
• Suitable for residential and light commercial HVAC installations

Compatibility

Designed as an OEM-style replacement and standard-supply thermostat cable for residential and light commercial low-voltage HVAC control wiring applications.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with NEC low-voltage wiring guidelines. Power down the HVAC system at the disconnect or breaker before making any control wiring connections. Avoid running low-voltage thermostat cable in the same conduit as line-voltage wiring. Secure the cable at appropriate intervals per local code requirements.

Technical Specifications

• Wire Gauge: 18 AWG
• Number of Conductors: 4
• Spool Length: 250 feet
• Listing: UL Listed
• Application: Low-voltage thermostat wiring

Standard Information

• Brand: HEATCONTROLLERMARS84203
• Manufacturer Part Number: MARS-84203