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Southwire THHN is 12 AWG stranded copper building wire for conduit and cable tray runs: branch circuits, feeders and service work. The thermoplastic insulation is rated 600 V and 90°C, and the same wire is listed for use inside NM-B, UF-B, SER, SEU and MC assemblies. Stranded copper bends and pulls through conduit more easily than solid, which is why electricians favor it for long or bend-heavy runs; solid 12 AWG is stiffer but terminates faster at devices. It is a commodity conductor, so it competes on jacket quality and coil handling rather than features.
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Lowest price we've seen: $25.99 on Nov 9 at Amazon. Tracked across 2 stores since Nov 9.
Electricians and DIYers rate this wire on how it pulls and strips. Most praise the stranded construction for conduit work and the clear gauge and rating markings; complaints center on coil memory and occasional jacket nicks.
This is Southwire THHN building wire with a stranded copper conductor in 12 AWG. THHN and THWN is a multi-purpose wire used in conduit and cable trays for service, feeders and branch circuits in commercial and industrial applications.
It is also used as a conductor in NM-B, UF-B, SER, SEU and MC cable. The wire is rated for 600 volts and has a heat rating of up to 90 degrees C. In 12 AWG, it is used for commercial wiring to outlets, switches and other loads.
