Southwire Romex Type NM-B nonmetallic-sheathed cable in a cut length, ready for indoor branch-circuit wiring. Solid copper conductors with 90C THHN/THWN-2 thermoplastic insulation inside a flame-retardant, moisture-resistant PVC jacket - the standard wiring method for residential dry-location branch circuits per NEC Article 334.

• Gauge / Conductors: 8/3G - 3 insulated conductors plus bare copper equipment ground
• Length: 25 Ft cut piece, individually boxed for shelf service
• Insulation: 600V THHN/THWN-2 rated 90C; ampacity used at the 60C column per NEC 334.80
• Jacket: color-coded NEMA convention - Black for 8 AWG (white=14, yellow=12, orange=10, black=8/6)
• Ampacity: 40A maximum overcurrent protection on 120/240V circuits
• Use in dry interior locations only - inside walls, ceilings, and accessible attic spaces of one- and two-family dwellings
• Manufacturer Part No: 63949221

Circuit Use: 8/3G provides three insulated conductors plus ground for 40A 120/240V circuits that need a neutral - the classic free-standing electric range circuit, large window air conditioners, and some sub-panel feeds. The two hots plus neutral let the appliance run 240V heating elements while powering 120V controls, clocks, and oven lights.

Length Use Case: 25 feet handles a single device drop - one new receptacle or switch added to an existing branch, a dedicated over-stove microwave circuit, or a short fixture relocation. Leave a few feet of slack at both ends for service loops in the box and at the panel.

NM-B vs UF vs MC: Type NM-B is for indoor dry-location use only. Switch to UF cable for direct burial or damp/wet locations, and to MC (metal-clad) cable for installations exposed to physical damage or where local code requires an armored sheath. Do not use NM-B in conduit fills, embedded in concrete, or anywhere exposed to moisture.

Tip: Pull the cable, do not push it - kinks in NM-B are permanent and stress the insulation at the bend. Strip the outer jacket with the built-in rip cord (pull the inner cord 6-8 inches back from the cut, then split the jacket lengthwise) rather than scoring with a knife, which risks nicking the conductor insulation underneath. Romex is a registered trademark of Southwire Company.