MOB oh I mean Capt Al. [Linked Image]

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Is not most THHN also listed THWN and vice versa?

I think you are correct. [Linked Image]

The reason many of us point out the need for a "W" type insulation is only to show off. [Linked Image] Well that and make everyone aware of 300.5(D)(5)

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300.5(D)(5) Listing. Cables and insulated conductors installed in enclosures or raceways in underground installations shall be listed for use in wet locations.

Bob

Bob Badger
Construction & Maintenance Electrician
Massachusetts