8/3 NM-B Wire with Ground 100FT 8 Gauge Non-Metallic Sheathed Cable

In this review of the 8/3 NM-B Wire with Ground 100FT, the bottom line is simple: this cable is aimed at homeowners and electricians who need a reliable, high-capacity feed for appliances or subpanels in dry, indoor locations. The single biggest reason to buy is the use of premium pure copper conductors that deliver solid conductivity and minimal power loss, making it a practical choice when safety and long-term performance matter in residential branch wiring.

Key Features

• Pure Copper Conductor: High-purity bare copper reduces resistance and helps maintain stable voltage on long runs, which is important for heavy loads.
• Durable Dual Jacket: A flame-retardant PVC inner insulation combined with a nylon outer jacket protects the cable from abrasion, moisture exposure in approved dry locations, and common jobsite wear.
• Paper-Wrapped Ground: The grounded conductor is neatly wrapped in kraft paper for easy identification and separation during installation.
• NEC Type NM-B Compliance: Manufactured to meet National Electrical Code requirements for NM-B cable, suitable for in-wall and other dry interior branch circuits.
• Wide Temperature Rating: Rated for 600V and a -10C to 90C (14F to 194F) range to maintain performance across typical residential environments.
• RoHS Compliant: Produced without restricted hazardous substances to meet modern environmental and safety expectations.

Who It's For

This cable suits electricians and experienced DIYers wiring dedicated circuits for appliances, subpanels, or high-draw loads like tankless water heaters in dry indoor locations. The 8 AWG size and three conductors plus ground make it appropriate for circuits requiring higher ampacity where NM-B is allowed by code.

Those who need highly flexible cable for repeated movement or installations in wet or outdoor locations should look elsewhere, as NM-B is intended for permanent, dry interior use and the outer sheathing is noticeably robust and less flexible than some alternatives.

Pros & Cons

Pros

• Premium copper conductors provide dependable conductivity and reduced power loss for heavy residential circuits.
• Dual-layer PVC and nylon jacket offers enhanced protection against abrasion and common chemicals encountered indoors.
• Clear kraft paper wrapping around the ground makes conductor identification and separation faster at the panel or device.
• Meets NEC NM-B requirements and is RoHS compliant for safer, standards-based installations.

Cons

• Outer sheathing is stiff and can be difficult to work with in tight spaces or where flexibility is needed.
• Not suitable for wet or outdoor use; it is limited to dry interior applications per NM-B guidelines.

Specifications

Our Verdict

The 8/3 NM-B 100FT cable is a solid, cost-effective choice for residential branch wiring where a robust, high-capacity run is required. Its pure copper conductors and dual-layer protective jacket deliver reliable performance and longevity for indoor circuits, though installers should be prepared for a stiffer outer sheath. Overall, it offers good value for homeowners and professionals wiring permanent dry locations.

Frequently Asked Questions

Is this cable suitable for a tankless water heater?
Yes, it is commonly used for dedicated appliance circuits; verify ampacity and local code before installation.

Can this be used outdoors or in wet areas?
No, NM-B is intended for dry interior locations only and is not rated for wet or exterior installations.

How easy is it to strip and work with?
The conductors are standard copper, but several customers noted the outer sheathing is stiff and requires care when routing in tight spaces.