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Southwire Romex 10/2 NM-WG is a 25-foot coil of two-conductor nonmetallic sheathed cable with a bare ground wire, used for 30-amp branch circuits in dry indoor locations. The conductors are solid THHN copper rated 90°C and 600V, but the National Electrical Code limits the ampacity to the 60°C column, so the cable is treated as a 30-amp product. It suits homeowners and electricians running dryer, water heater, or subpanel feeders through walls, ceilings, and masonry. Against single-conductor THHN in conduit, it is faster to run and needs no conduit indoors, but it cannot go underground or in wet spots and is stiffer to pull through tight bends.
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Owners and electricians describe this cable as standard, code-compliant branch wire that pulls reasonably well for its gauge. Most complaints center on stiffness in cold weather and the effort of bending 10-gauge solid copper in tight boxes.
Southwire Romex 10/2NM-WGX25 is sheathed non-metallic cable for building wiring. Its inner conductors are solid THHN, rated 90°C and 600 V. The outer jacket is PVC, rated 75°C.
It can be used for exposed or concealed wiring in dwellings that do not exceed 3 floors above grade. The cable can be fished through walls, ceilings and masonry blocks. It suits new wiring or replacement wiring, and it is for use only in normally dry locations.
Under National Electrical Code Article 336, its amp rating is limited to that of 60°C rated conductors. It is UL listed.
