Southwire 63950002 NM-B Cable, 125 ft – 6 Gauge, 3 Conductor, Indoor Black

Overview

Meet the Southwire Romex SIMpull 6-3 NM-B indoor cable with ground. This nonmetallic, three-conductor conductor assembly arrives in a long 125-foot reel, designed for inside installations where you need a reliable, easy-to-pull wiring solution. With a 600-volt rating and a temperature tolerance up to 90°C, it suits modern residential and light commercial projects that stay indoors and dry.

The NM-B cable is suitable for both exposed and concealed work in normally dry locations. It can be tucked into air voids within masonry block or tile walls where conditions stay dry, helping you keep runs neat and compliant without compromising performance. The color-coded insulation helps with identification on complex job sites, while the SIMpull design reduces resistance during pulling, saving time on longer runs.

Key benefits at a glance

• Indoor, nonmetallic sheathed cable with ground for three-conductor circuits.
• 125-foot length provides flexibility for longer runs without frequent splicing.
• 6-gauge conductors rated up to 600 volts, suitable for typical residential feeds.
• SIMpull NM-B design for smoother installation in tight spaces.
• Dry-location suitability; can be run in air voids of certain walls that stay dry.

Practical uses and installation notes

• Residential wiring in concealed or exposed indoor walls and ceilings.
• Retrofits or new builds where a reliable, long NM-B run is required.
• Applications inside dry environments, avoiding damp or wet locations.
• Use in standard indoor circuits that require three conductors plus a ground.

Specifications at a glance

• Gauge: 6
• Conductors: 3 (with ground)
• Length: 125 ft
• Type: NM-B, nonmetallic sheathed, indoor use
• Color: Black insulation
• Voltage rating: 600 V
• Temperature rating: Up to 90°C

Note: This cable is intended for normally dry locations and is not designed for wet or damp areas. Always follow local electrical codes and safety practices when planning and executing wiring projects.