---
product_id: 288111700
title: "Southwire 64170422 18/7 Solid Copper Class 2 Power-Limited Thermostat Wire; 50 feet ; Brown"
brand: "southwire"
price: "€ 82.43"
currency: EUR
in_stock: true
reviews_count: 5
category: "Southwire"
url: https://www.desertcart.hr/products/288111700-southwire-64170422-18-7-solid-copper-class-2-power-limited
store_origin: HR
region: Croatia
---

# 150V Class 2 power-limited rating 7 solid copper conductors 6 mil PVC insulation jacket Southwire 64170422 18/7 Solid Copper Class 2 Power-Limited Thermostat Wire; 50 feet ; Brown

**Brand:** southwire
**Price:** € 82.43
**Availability:** ✅ In Stock

## Summary

> ⚡ Power your smart home with confidence and style!

## Quick Answers

- **What is this?** Southwire 64170422 18/7 Solid Copper Class 2 Power-Limited Thermostat Wire; 50 feet ; Brown by southwire
- **How much does it cost?** € 82.43 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/288111700-southwire-64170422-18-7-solid-copper-class-2-power-limited)

## Best For

- southwire enthusiasts

## Why This Product

- Trusted southwire brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **6 Mil PVC Insulation:** Durable jacket ensures long-lasting protection and safety indoors
- • **50 Feet of Premium Wire:** Ample length for versatile residential heating and cooling setups
- • **7 Solid Copper Conductors:** Reliable, corrosion-resistant wiring for flawless thermostat control
- • **UL Listed & RoHS Compliant:** Certified quality and eco-friendly for peace of mind
- • **Class 2 Power-Limited Cable:** Meets NEC standards for safe, low-voltage HVAC and alarm systems

## Overview

Southwire 64170422 is a 50-foot, 18/7 gauge solid copper thermostat wire designed for indoor residential HVAC and alarm control applications. Featuring 7 conductors coated in a durable 6 mil PVC jacket, it meets Class 2 power-limited circuit standards with a 150V rating. UL listed and RoHS compliant, this wire ensures safe, reliable, and eco-conscious performance for modern smart home systems.

## Description

For use in indoor residential thermostat control applications; heating and air conditioning control bell and alarm systems. Southwire's Thermostat Wire is a class 2 power-limited circuit cable. Southwire's thermostat cable adheres to the following specifications: Class 2- Power Limited per NEC Article 725; MP- Multi Purpose Cable per Articles 725; 760; and 800; CM-Communication Cable per Article 800; FPL-Power Limited Fire Protective Signaling Cable per Article 760; Sunlight Resistant; PVC Insulation; and Solid Bare Copper per UL Standard 13; RoHS Compliant; OSHA Acceptable. Voltage rating is 150 volts.

Review: Good for 2 stages or auxiliary functions needing more than 5 wires - Nice solid wire, color coded for the different terminals, very easy to tape together and pull in place of the old wire. Works very well for my 2 stage furnace with AC and now with my smart thermostat, it has all the features over a 5 wire. And now I have an extra wire in case I ever upgrade to geothermal, heat pump, two stage air-conditioner, or just if one of the other wires breaks or has a problem. Good price point too
Review: Nice spool of thermostat wire - Great priced spool of 18/7 solid copper thermostat wire. The 7 strands should be enough for even the modern smart thermostats. I have an evaporative cooler with a separate thermostat, and an older furnace with an older 2-wire thermostat. So, to plan for upgrades, I got this to replace the current 2 wire system to add the crucial common wire for a smart thermostat and to also lay the ground work for a future AC installation. This wire is flexible enough to be easy to work with and to fish through small places and corners. Would highly recommend! Pros: - 7 wire 18 gauge solid core wire - Flexible enough to fish through tight corners - 50 ft as received - 150V rated - UV resistant Cons: - Thicker insulation would have been nice

## Features

- Coated in a PVC jacket with 6 mils of PVC insulation
- Class 2 power-limited circuit cable for use in thermostat control applications
- UL Listed
- 18 gauge; 7 conductors with 6 mils with 50' per coil

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0069F4HEU |
| Best Sellers Rank | #180,928 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #820 in Electrical Wire |
| Brand | Southwire |
| Brand Name | Southwire |
| Color | Brown |
| Colour | Brown |
| Customer Reviews | 4.6 out of 5 stars 418 Reviews |
| Gauge | 18_gauge |
| Global Trade Identification Number | 00032886855962 |
| Included Components | Thermostat Wire |
| Item Type Name | Southwire 64170422 50' 18/7 Thermostat Class 2 Power-Limited Circuit Cable for use in residential heating and air conditioning, Brown |
| Item Weight | 939 g |
| Manufacturer | Southwire |
| Material | Copper |
| Material Type | Copper |
| Model | 64170422 |
| Number Of Wires | 7 |
| Number of cable strands | 7 |
| Part Number | 64170422 |
| Strands | 7 |
| UPC | 032886855962 |
| Unit Count | 1 Count |
| Voltage | 150 Volts |
| Wire Diameter | 6 Mils |

## Images

![Southwire 64170422 18/7 Solid Copper Class 2 Power-Limited Thermostat Wire; 50 feet ; Brown - Image 1](https://m.media-amazon.com/images/I/41rpahyx3LL.jpg)
![Southwire 64170422 18/7 Solid Copper Class 2 Power-Limited Thermostat Wire; 50 feet ; Brown - Image 2](https://m.media-amazon.com/images/I/81N2SKfZz6L.jpg)
![Southwire 64170422 18/7 Solid Copper Class 2 Power-Limited Thermostat Wire; 50 feet ; Brown - Image 3](https://m.media-amazon.com/images/I/71on3s+eadL.jpg)
![Southwire 64170422 18/7 Solid Copper Class 2 Power-Limited Thermostat Wire; 50 feet ; Brown - Image 4](https://m.media-amazon.com/images/I/81s7927oEdL.jpg)
![Southwire 64170422 18/7 Solid Copper Class 2 Power-Limited Thermostat Wire; 50 feet ; Brown - Image 5](https://m.media-amazon.com/images/I/81YL1X-DRLL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good for 2 stages or auxiliary functions needing more than 5 wires
*by M***R on 30 March 2019*

Nice solid wire, color coded for the different terminals, very easy to tape together and pull in place of the old wire. Works very well for my 2 stage furnace with AC and now with my smart thermostat, it has all the features over a 5 wire. And now I have an extra wire in case I ever upgrade to geothermal, heat pump, two stage air-conditioner, or just if one of the other wires breaks or has a problem. Good price point too

### ⭐⭐⭐⭐⭐ Nice spool of thermostat wire
*by M***N on 16 June 2020*

Great priced spool of 18/7 solid copper thermostat wire. The 7 strands should be enough for even the modern smart thermostats. I have an evaporative cooler with a separate thermostat, and an older furnace with an older 2-wire thermostat. So, to plan for upgrades, I got this to replace the current 2 wire system to add the crucial common wire for a smart thermostat and to also lay the ground work for a future AC installation. This wire is flexible enough to be easy to work with and to fish through small places and corners. Would highly recommend! Pros: - 7 wire 18 gauge solid core wire - Flexible enough to fish through tight corners - 50 ft as received - 150V rated - UV resistant Cons: - Thicker insulation would have been nice

### ⭐⭐⭐⭐⭐ Does what it's supposed to
*by K***M on 18 July 2019*

Wires are really large gauge (small) but that's all you need, I guess. Even the C wire only handles 24 V at about an amp so it's fine. Color coding was a bit off for me but I worked around it. This wire just has a certain heft to it and seems to be quality. Would buy again. Southwire has a good reputation for quality wire product.

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---

*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-06-29*