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White PVC insulated solid copper thermostat wire on spool

Logico

Logico 20/4 Thermostat Wire Solid Copper CMR 500ft White

SKU CH-MAT9-VGYHC

Solid copper 20-gauge thermostat wire on a 500ft CMR-rated spool for reliable HVAC connections

  • Conductor gauge20 Gauge
  • Number of conductors4
  • Spool length500 ft (152 m)
  • Stranded/solidSolid
  • Insulation materialPVC CMR
  • Sold asRoll
  • Solid copper conductors ensure stable thermostat connections
  • CMR-rated PVC insulation meets riser safety requirements
  • 500ft roll covers large installations or multiple jobs
  • Four conductors handle standard HVAC control circuits
  • 20-gauge solid wire simplifies termination and routing

20/4 Thermostat Wire for HVAC

This Logico thermostat wire uses 20-gauge solid copper conductors in a four-conductor layout. The CMR-rated PVC insulation meets riser safety requirements for in-wall runs. It is supplied on a 500ft spool for residential or commercial heating and cooling installations.

Replaces older thermostat cable

Installers upgrading from two-conductor or lower-gauge wire gain the extra conductors needed for modern multi-stage systems. The solid copper core reduces resistance on long pulls compared with stranded alternatives. The jump is worthwhile when the thermostat calls for independent heat, cool, fan and common connections.

Limited to low-voltage Class 2 circuits

The CMR rating covers vertical shaft routing but does not permit plenum or direct-burial use. Solid conductors are not suited to repeated flexing or tight-radius bends in moving equipment. Voltage must remain within the low-voltage class for which the insulation is rated.

How it compares

Measured against everything we stock in Wire, Cable & Wiring Supplies, at today’s prices. Recalculated every night.

Price $65.99
Pricier than about 75% of the 1,610 comparable items (median $25.99).

Specifications

Product
Brand nameLogico
Product typeLow Volt
Size & build
Overall length500 ft (152 m)
Main materialBare Copper
Spool length500 ft (152 m)
Insulation materialPVC CMR
More details
Conductor gauge20 Gauge
Number of conductors4
Stranded/solidSolid

Questions about this item

What wall cavity or conduit size fits the 20-gauge 4-conductor solid cable?

The 20/4 solid construction keeps the overall diameter small, so standard 1/2-inch electrical conduit or typical stud-bay drilling provides ample room for the 500ft roll.

How is the solid copper CMR cable terminated, and what mistake causes callbacks?

Strip each conductor cleanly, wrap clockwise around the thermostat and control-board screws, and tighten; the common error is nicking the solid copper while stripping, which creates a weak point that later breaks.

When should the white PVC CMR jacket be replaced?

Replace the run if the jacket becomes brittle, cracks when bent, or shows brown heat discoloration — signs the PVC has degraded beyond its rated temperature range.

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