12/3 NM-B Wire with Ground 100FT 12 Gauge Non-Metallic Sheathed Cable

In this review of the 12/3 NM-B Wire with Ground 100FT, the reviewer finds it to be a solid, cost-effective option for standard residential branch wiring. Intended for electricians and competent DIYers, the cable stands out for its pure copper conductor that provides dependable conductivity and meets NEC expectations for Type NM-B use. The single biggest reason to buy is the combination of high-purity copper and robust dual-layer insulation, which together deliver reliable in-wall performance for outlets, switches, and many dedicated circuits.

Key Features

• Premium Pure Copper Conductor: High-purity bare copper conductors ensure strong electrical conductivity with minimal power loss for residential circuits.
• Durable PVC & Nylon Jacket: Flame-retardant PVC inner insulation and an abrasion-resistant nylon outer jacket protect the cable in approved dry locations and against physical wear.
• Paper-Wrapped Grounding Wire: The ground conductor is wrapped in kraft paper for easier identification and separation during terminations and pulls.
• Wide Temperature Range: Rated to perform from -10C to 90C (14F to 194F), the cable maintains stable operation across typical indoor temperature conditions.
• NEC Type NM-B Compliance: Manufactured to meet the National Electrical Code requirements for NM-B cable, suitable for standard residential branch wiring.
• RoHS Compliant Production: Built without restricted hazardous materials, offering responsible manufacturing and consistent quality control.

Who It's For

The cable is best for homeowners doing interior wiring projects, electricians installing branch circuits, and DIYers who need a 12 AWG, 3-conductor cable for outlets, lighting, or dedicated appliance circuits. Its 100 ft length and 12/3 configuration make it a common choice for runs feeding major appliances or subpanels within dry, indoor locations.

Those who should look elsewhere include installers needing highly flexible or plenum-rated cable, or anyone wiring wet or outdoor locations where NM-B is not approved. If extreme flexibility for tight conduit runs is required, alternative stranded or more flexible jacketed cables may be preferable.

Pros & Cons

Pros

• High-purity bare copper conductors for reliable conductivity and minimal voltage drop on typical residential circuits.
• Dual-layer construction with flame-retardant PVC and a nylon outer jacket adds physical and chemical resistance for in-wall installations.
• Clear paper-wrapped ground conductor simplifies identification and separation during termination.
• RoHS compliance and NEC Type NM-B manufacturing provide reassurance on standards and material safety.

Cons

• The outer sheathing is fairly stiff and can be difficult to work with, particularly when pulling through tight spaces or making final bends.

Specifications

Conductor	Pure bare copper
Gauge	12 AWG (12 gauge)
Configuration	12/3 with ground (3 conductor plus ground)
Length	100 ft
Cable Type	NM-B (Non-Metallic Sheathed)
Voltage Rating	600 V
Temperature Range	-10C to 90C (14F to 194F)

Our Verdict

For standard interior residential wiring, this 12/3 NM-B cable is a practical, value-oriented choice because of its pure copper conductor and protective dual-layer jacket. It performs well for outlets, switches, dedicated circuits, and many appliance feeds, offering reliable conductivity and NEC-compliant construction. Choose it when you need a dependable 100 ft run, but consider more flexible or specialty cable for tight conduit or non-dry locations.

Frequently Asked Questions

Is this cable suitable for in-wall residential wiring?
Yes. It is Type NM-B and manufactured to meet NEC requirements for dry, interior branch wiring installations.

Can this cable be used for a 40 Amp tankless water heater?
Customers have used it for some dedicated appliance circuits; ensure the appliance and circuit breaker ratings match 12 AWG capacity and local code before connecting.

Is the jacket easy to strip and work with?
The inner insulation strips cleanly, but the outer nylon sheathing is relatively stiff and can be harder to cut and bend during installation.