---
product_id: 18993229
title: "12/3 Gauge Romex SIMpull NM-B Cable"
brand: "southwire"
price: "$339.44"
currency: USD
in_stock: null
reviews_count: 8
url: https://www.desertcart.ec/products/18993229-12-3-gauge-romex-simpull-nm-b-cable
store_origin: EC
region: Ecuador
---

# 600V Rating 50ft Length 12 AWG Gauge 12/3 Gauge Romex SIMpull NM-B Cable

**Brand:** southwire
**Price:** $339.44
**Availability:** ❌ Out of Stock

## Summary

> 🔧 Wire Your World with Confidence!

## Quick Answers

- **What is this?** 12/3 Gauge Romex SIMpull NM-B Cable by southwire
- **How much does it cost?** $339.44 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/18993229-12-3-gauge-romex-simpull-nm-b-cable)

## 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

- • **Trusted Brand:** Southwire's quality ensures peace of mind in your projects.
- • **Durable Design:** Constructed for above-ground use in dry locations.
- • **Versatile Application:** Ideal for residential wiring of switches and outlets.
- • **Effortless Installation:** Patented SIMpull Cable Jacket for smooth pulling and stripping.
- • **Robust Voltage Capacity:** Handles up to 600 volts for reliable performance.

## Overview

The Southwire Romex Brand Simpull Solid Indoor 12/3 W/G NMB Cable is a 50ft coil designed for residential wiring, featuring a patented SIMpull Cable Jacket for easy installation and a robust voltage rating of 600 volts, making it a reliable choice for your electrical projects.

## Description

For general wiring of homes; stores; and shops. Southwire Romex Brand SIMpull NM-B (nonmetallic-sheathed) cable may be used for both exposed and concealed work in normally dry locations at temperatures not to exceed 90¬∞C (with ampacity limited to that for 60¬∞C conductors) as specified in the 2011 National Electrical Code. NM-B cable is primarily used in residential wiring as branch circuits for outlets; switches; and other loads. NM-B cable may be run in air voids of masonry block or tile walls where such walls are not wet or damp locations. Voltage rating for NM-B cable is 600 volts.

## Features

- Coated in patented SIMpull Cable Jacket for easier pulling, stripping, and installation
- Romex Type NM-B Copper Building Wire is commonly applied in residential building wiring as a branch circuit for switches and outlets
- Installation above ground and in dry locations only
- The voltage rating of the cable is 600 volts
- NM-B cable may be run in air voids of masonry block or tile walls where such walls are not wet or damp locations

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Color | Yellow |
| Brand | Southwire |
| Material | Metal |
| Number of Cable Strands | 3 |
| Gauge | 12.0 |
| Voltage | 600 Volts |
| Manufacturer | Southwire |
| Part Number | 63947622 |
| Item Weight | 5.35 pounds |
| Product Dimensions | 2.5 x 9.8 x 9.8 inches |
| Item model number | 63947622 |
| Is Discontinued By Manufacturer | No |
| Size | 12 AWG |
| Style | Southwire |
| Item Package Quantity | 1 |
| Included Components | wire |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Color:** grey or white
- **Brand:** Southwire
- **Material:** Copper, Nylon, Polyvinyl Chloride
- **Number of Cable Strands:** 3
- **Gauge:** 12.0

## Images

![12/3 Gauge Romex SIMpull NM-B Cable - Image 1](https://m.media-amazon.com/images/I/51+xQ2WvAxL.jpg)
![12/3 Gauge Romex SIMpull NM-B Cable - Image 2](https://m.media-amazon.com/images/I/71XS8LhoYTL.jpg)
![12/3 Gauge Romex SIMpull NM-B Cable - Image 3](https://m.media-amazon.com/images/I/71tBERueTNL.jpg)
![12/3 Gauge Romex SIMpull NM-B Cable - Image 4](https://m.media-amazon.com/images/I/81m9jFgiR-L.jpg)
![12/3 Gauge Romex SIMpull NM-B Cable - Image 5](https://m.media-amazon.com/images/I/71HmZlgf1gL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: How many amps can this carry?**
A: Did some research and found gauge #12 is for 20 amps, gauge # 10 is for 30 amps, gauge #8 is for 40 amps.  Hope that helps.

**Q: Is this newly manufactured or older?  I’m in need of 5 year old indoor wiring don’t know how to obtain some**
A: I'm not entirely sure what you mean or why you said you think you need 5 year old wiring. Unless there is some kind of breach in the insulation or a poor connection, the copper will not degrade. Therefore the vintage of the wire is a non sequitur. The diameter of the copper wire determines the ampacity of the wire. The type and thickness of the insulation determine the rated maximum voltage the wire can safely accommodate. The physical dimensions of the copper wire and the insulation thickness of, in this case, Romex, has not changed in at least 20 years. Therefore I am confused as to why you are specifically asking for 5 year old wire. Unless there is some very specific condition the wire will be used for, wire age will make no difference to the installation.

**Q: Can this be run inside the emt conduit?**
A: Theoretically, I guess you could. My question would be, why? This kind of wire doesn't need conduit - this version is for "out of ground" areas, there is a direct burial version  too. 

So back to your question,  yes you can (NEC doesn't specifically say you can't) but you can save a bunch of $$ by either running it without conduit or by purchasing THHN wire if you must run conduit. Hope this helps!

**Q: When will it be in stock?**
A: That is a question to ask either Southwire or Amazon.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great price
*by T***A on March 5, 2025*

Product as expected, but better price than big box home improvement store.

### ⭐⭐⭐⭐⭐ Excellent product and quality.
*by G***S on January 23, 2025*

Excellent product and quality.

### ⭐⭐⭐⭐⭐ NMB Wire - Nobody Makes it Better
*by J***B on October 31, 2013*

THE GOOD: SouthWire is North America’s leading manufacturer of wire and cable. Safety should be priority #1 for anyone that works with electrical products and SouthWire has a long history of manufacturing a high quality product at a very competitive price. All wire is not the same and SouthWire products are well respected in the industry. The coil of wire arrived neatly packaged and ready to use.THE BAD: Well, it's not really bad, per se, but it is pretty tricky to work with a 50 foot coil of wire, especially when you remove the shrink wrap. The wire certainly doesn't spring apart like cheap garden hose but it is a bit challenging to manage the cable when you're in tight quarters and working alone. I'd love it if wire manufacturers started packaging 50 foot coils the same way they package 500 foot boxes of phone or network wire. So, the product is great, but the packaging could be easier to handle.THE BOTTOM LINE: A great high quality product, A fantastic price that beat all the big box stores and all the other online merchants. Reasonably fast delivery (less than a week). What more could you ask for? Worthy of a 5 star rating - no stars lost because of packaging since all the vendors package the small coils the same way.

## Frequently Bought Together

- Southwire Romex Brand Simpull Solid Indoor 12/3 W/G NMB Cable 50ft coil - SW 63947622
- Southwire Romex Brand Simpull Solid Indoor 12/2 W/G NMB Cable 100ft coil - SW# 28828228
- Southwire Romex Brand Simpull Solid Indoor 14/3 W/G NMB Cable 50ft coil - SW# 63946822

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---

*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-02-20*