guest598
Dec 17, 2011, 01:14 PM
Can THHN Wire be used in PVC under ground.
donf
Dec 17, 2011, 01:26 PM
No, THHN is listed (Article 300, Table 310.13(A)) as dry or damp areas.
Earth is considered a wet area. Conduit, below ground level is also considered to be in a wet area.
THHW, THW, THW-2,THWN, THWN-2 and TW are acceptable for wet areas.
tkrussell
Dec 17, 2011, 02:12 PM
Check the wire you may have, most THHN is dual rated as THHN/THWN