20-3C Thermostat Wire

THRM20-3

THRM20-3-500-WT

HEAT, MOISTURE AND SUNLIGHT RESISTANT PVC JACKET.
Download Spec Sheet
1/2
Wire Size 20 AWG
Conductor Material Copper
Conductor Type Solid
Outer Diameter 0.124 in.
Conductor Count 3
Voltage Rating 150V
Download Spec Sheet

Product Details

Product Details
APPLICATION:
Thermostat Wire is primarily used for power limited circuits such as thermostats, air conditioning, heat pumps, bell and alarm systems, signals systems, door bells and remote control units where the voltage does not exceed 300 volts. Temperature rating is -20°C to +60°C.

CONDUCTOR:
Solid soft drawn copper, per ASTM B3 and B258.

INSULATION:
Heat and moisture resistant colored polyvinyl chloride (PVC) insulation.

JACKET:
Outer jacket of polyvinyl chloride (PVC), which is heat, moisture and sunlight resistant.

JACKET COLORS:
Brown or White.

CONDUCTOR COLORS:
White, Red, and Green.


All values are nominal and subject to correction.

Full Specifications

Full Specifications
Download Spec Sheet

Physical Specifications

Wire Size (AWG/MCM) 20 AWG
Conductor Material Copper
Conductor Type Solid
Strand Count Solid
Outer Diameter (OD) (in/mm) 0.124 in.
Jacket Type PVC
Conductor Count 3
Shield Unshielded
Insulation Type PVC
UL Listing Numbers UL

Technical Specifications

Voltage Rating 150V
Submersible No
Flexibility Rating Very Good
Sunlight Resistance Rating Yes
Temperature Rating 60°C
Standards UL 13, CL2
UL 444, CM
NEC Article 725
Sunlight Resistant
Miscellaneous Information All values are nominal and subject to correction.

Usage & Installation

Primary ApplicationsResidential and Commercial HVAC Systems, Boilers and Furnaces, Air Conditioning Units, Heat Pumps, Zoning Systems, General Purpose Control.

Packaging & Dimensions:

Weight per Foot 0.015 lb

Shipping and Returns

Shipping and Returns

General Shipping Information

In-stock orders placed before 3pm EST typically ship within 1-2 business days. Our business days are Monday through Friday; we do not process orders on Saturday, Sunday, or major US Holidays.

You will receive an e-mail with a tracking number within 1-2 business days from the time its shipped. You will also be able to view your order status and tracking numbers in your account order history.

Expedited Shipping

Expedited shipments are delivered Monday-Friday except on US Holidays. The order must be placed before 12pm CST to ship same day ( Mon-Fri Only).

Returns

You have 30 days from the day you receive the item to contact us for a return. Returns are subject to a 30% Restocking Fee.

Please contact us at help@wireamerica.com to request a return authorization. Have your order number or name the order was placed with ready and we will email you an RMA (return) number and instructions for return. Currently, we do not offer exchanges. A new order must be placed if you need a different item. If you provide the new order number at the time of your return request, the restocking fee may be lowered.

Orders on any items with a material value of $50 or less are non-returnable.

Thermostat Wire

Wire America | Wire Flexibility Series

This video shows the construction, jacket and flexibility of the Brown 18-4 and 18-10 Conductor Thermostat Wire .

20-3C Thermostat Wire

THRM20-3

THRM20-3-500-WT

HEAT, MOISTURE AND SUNLIGHT RESISTANT PVC JACKET.
In Stock
Ships in 1-2 days

THRM20-3

THRM20-3-500-WT

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Product Details

Product Details
APPLICATION:
Thermostat Wire is primarily used for power limited circuits such as thermostats, air conditioning, heat pumps, bell and alarm systems, signals systems, door bells and remote control units where the voltage does not exceed 300 volts. Temperature rating is -20°C to +60°C.

CONDUCTOR:
Solid soft drawn copper, per ASTM B3 and B258.

INSULATION:
Heat and moisture resistant colored polyvinyl chloride (PVC) insulation.

JACKET:
Outer jacket of polyvinyl chloride (PVC), which is heat, moisture and sunlight resistant.

JACKET COLORS:
Brown or White.

CONDUCTOR COLORS:
White, Red, and Green.


All values are nominal and subject to correction.

Full Specifications

Full Specifications
Download Spec Sheet

Physical Specifications

Wire Size (AWG/MCM) 20 AWG
Conductor Material Copper
Conductor Type Solid
Strand Count Solid
Outer Diameter (OD) (in/mm) 0.124 in.
Jacket Type PVC
Conductor Count 3
Shield Unshielded
Insulation Type PVC
UL Listing Numbers UL

Technical Specifications

Voltage Rating 150V
Submersible No
Flexibility Rating Very Good
Sunlight Resistance Rating Yes
Temperature Rating 60°C
Standards UL 13, CL2
UL 444, CM
NEC Article 725
Sunlight Resistant
Miscellaneous Information All values are nominal and subject to correction.

Usage & Installation

Primary ApplicationsResidential and Commercial HVAC Systems, Boilers and Furnaces, Air Conditioning Units, Heat Pumps, Zoning Systems, General Purpose Control.

Packaging & Dimensions:

Weight per Foot 0.015 lb

Shipping and Returns

Shipping and Returns

General Shipping Information

In-stock orders placed before 3pm EST typically ship within 1-2 business days. Our business days are Monday through Friday; we do not process orders on Saturday, Sunday, or major US Holidays.

You will receive an e-mail with a tracking number within 1-2 business days from the time its shipped. You will also be able to view your order status and tracking numbers in your account order history.

Expedited Shipping

Expedited shipments are delivered Monday-Friday except on US Holidays. The order must be placed before 12pm CST to ship same day ( Mon-Fri Only).

Returns

You have 30 days from the day you receive the item to contact us for a return. Returns are subject to a 30% Restocking Fee.

Please contact us at help@wireamerica.com to request a return authorization. Have your order number or name the order was placed with ready and we will email you an RMA (return) number and instructions for return. Currently, we do not offer exchanges. A new order must be placed if you need a different item. If you provide the new order number at the time of your return request, the restocking fee may be lowered.

Orders on any items with a material value of $50 or less are non-returnable.

Thermostat Wire

Wire America | Wire Flexibility Series

This video shows the construction, jacket and flexibility of the Brown 18-4 and 18-10 Conductor Thermostat Wire .
20-3C Thermostat Wire
Full Specifications

Physical Specifications

Wire Size (AWG/MCM) 20 AWG
Conductor Material Copper
Conductor Type Solid
Strand Count Solid
Outer Diameter (OD) (in/mm) 0.124 in.
Jacket Type PVC
Conductor Count 3
Shield Unshielded
Insulation Type PVC
UL Listing Numbers UL

Technical Specifications

Voltage Rating 150V
Submersible No
Flexibility Rating Very Good
Sunlight Resistance Rating Yes
Temperature Rating 60°C
Standards UL 13, CL2
UL 444, CM
NEC Article 725
Sunlight Resistant
Miscellaneous Information All values are nominal and subject to correction.

Usage & Installation:

Primary ApplicationsResidential and Commercial HVAC Systems, Boilers and Furnaces, Air Conditioning Units, Heat Pumps, Zoning Systems, General Purpose Control.

Packaging & Dimensions:

Weight per Foot 0.015 lb
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AWG, or American Wire Gauge, is the standard system used primarily in North America to measure the diameter of electrical conductors. This system is critical because a wire's size directly impacts its electrical resistance and how much current (ampacity) it can safely carry. A key principle is that the smaller the AWG number, the larger the wire's diameter; for instance, 12 AWG is thicker and can carry more current than 14 AWG. Sizes beyond 0 AWG are referred to as "aught" (e.g., 1/0, 2/0). Selecting the correct AWG is essential for safe electrical installations, preventing overheating, and minimizing voltage drop.
Voltage drop is the natural reduction in electrical potential that occurs as current travels through a circuit, from the power source to a device. This happens because all wires inherently have resistance, which converts some electrical energy into heat, leading to a loss of voltage. While minor voltage drop is normal, excessive amounts can cause problems like dimming lights, slow or overheating motors, and erratic electronic behavior. It can also lead to higher energy consumption and, in severe cases, create safety hazards due to overheating wires. Key factors influencing voltage drop include the wire's length and thickness (gauge), the amount of current flowing through it, and the quality of electrical connections.
In electrical wiring, amps (amperes) measure the rate of electrical current flow. Think of it as the volume of electricity moving through the wire at any given time. Crucially, every electrical wire has an ampacity rating, which is the maximum current it can safely carry continuously without overheating. Exceeding a wire's ampacity can lead to insulation damage and fire hazards, highlighting why proper wire sizing based on expected amperage is vital for safe electrical systems.
A wire's ampacity, or its safe current-carrying capacity, changes with temperature primarily because of two factors. First, the electrical resistance of copper and aluminum wires increases as they get hotter, causing them to generate more heat when current flows. Second, every wire's insulation has a maximum temperature limit; exceeding this can cause degradation and safety hazards. Therefore, in hotter environments, a wire must carry less current to avoid exceeding its insulation's temperature rating. This ensures the wire remains safe and functional, preventing overheating and potential failures.
We aim to provide authentic, precise images of each wire; however, with various product variations, it can be challenging. In such instances, we focus on showcasing the fundamental design. Always refer to the product specifications rather than relying solely on images.
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