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Solid THHN/THWN-2 WireFrom $0.20/ft -
Solid THHN/THWN-2 WireFrom $0.20/ft - Solid THHN/THWN-2 WireFrom $0.20/ft
- Solid THHN/THWN-2 WireFrom $0.20/ft
Parent SKU : THRMPL18-4
SKU : THRMPL18-4-250-WT
| Wire Size (AWG/MCM) | 18 AWG |
| Conductor Material | Copper |
| Conductor Type | Solid |
| Strand Count | Solid |
| Outer Diameter (OD) (in/mm) | 0.161 in. |
| Jacket Type | PVC |
| Conductor Count | 4 |
| Shield | Unshielded |
| Insulation Type | PVC |
| UL Listing Numbers | UL 13, UL 444 |
| Plenum Rating | true |
| Voltage Rating | 150V |
| Submersible | No |
| Flexibility Rating | Very Good |
| Sunlight Resistance Rating | Yes |
| Temperature Rating | 60°C |
| Standards | UL 13, CL2P UL 444, CM NEC Article 725, 800 Sunlight Resistant |
| Miscellaneous Information | All values are nominal and subject to correction. |
| Primary Applications | Residential and Commercial HVAC Systems, Boilers and Furnaces, Air Conditioning Units, Heat Pumps, Zoning Systems, General Purpose Control. |
| Weight per Foot | 0.03 lb |
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 shipments are delivered Monday-Friday except on US Holidays. The order must be placed before 12pm CST to ship same day ( Mon-Fri Only).
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.
Parent SKU : THRMPL18-4
SKU : THRMPL18-4-250-WT
Parent SKU : THRMPL18-4
SKU : THRMPL18-4-250-WT
| Wire Size (AWG/MCM) | 18 AWG |
| Conductor Material | Copper |
| Conductor Type | Solid |
| Strand Count | Solid |
| Outer Diameter (OD) (in/mm) | 0.161 in. |
| Jacket Type | PVC |
| Conductor Count | 4 |
| Shield | Unshielded |
| Insulation Type | PVC |
| UL Listing Numbers | UL 13, UL 444 |
| Plenum Rating | true |
| Voltage Rating | 150V |
| Submersible | No |
| Flexibility Rating | Very Good |
| Sunlight Resistance Rating | Yes |
| Temperature Rating | 60°C |
| Standards | UL 13, CL2P UL 444, CM NEC Article 725, 800 Sunlight Resistant |
| Miscellaneous Information | All values are nominal and subject to correction. |
| Primary Applications | Residential and Commercial HVAC Systems, Boilers and Furnaces, Air Conditioning Units, Heat Pumps, Zoning Systems, General Purpose Control. |
| Weight per Foot | 0.03 lb |
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 shipments are delivered Monday-Friday except on US Holidays. The order must be placed before 12pm CST to ship same day ( Mon-Fri Only).
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.
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Physical Specifications
Technical Specifications
Usage & Installation:
Packaging & Dimensions:
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The 18-4C Plenum Thermostat Wire is a specialized cable designed for power-limited circuits in HVAC and control systems. It features 18 American Wire Gauge (AWG) solid copper conductors and has a plenum-rated jacket, making it suitable for installation in air-handling spaces without the need for conduit. This wire is ideal for connecting thermostats, air conditioning units, heat pumps, and various alarm or signal systems.
Being 'Plenum-rated' means this wire is specifically designed for use in plenum spaces, which are areas in a building used for air circulation, such as above suspended ceilings or below raised floors. These cables have a fire-resistant jacket that produces minimal smoke and toxic fumes in the event of a fire, helping to prevent the rapid spread of fire and smoke throughout a building's ventilation system. This rating is crucial for meeting stringent building codes and ensuring safety.
This wire is primarily used in power-limited circuits for a variety of applications, including thermostats, air conditioning, and heat pump systems. It's also suitable for bell and alarm systems, signal systems, doorbells, and remote control units. Its plenum rating allows for installation in air-handling spaces without the need for additional conduit.
Yes, plenum-rated wire can be used in non-plenum spaces, including riser applications (vertical runs between floors) and general-purpose wiring within walls. While it is designed for the stricter requirements of plenum environments, its superior fire safety characteristics make it a safe choice for less demanding areas as well.
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