APPLICATION
Copper THHN/THWN-2 conductors are primarily used in conduit and
cable trays, when approved, for services, feeders and branch
circuits in commercial or industrial applications .
These conductors have multiple ratings
Depending upon the product application, allowable temperatures are
as follows: • THHN or T90 Nylon- Dry locations not to exceed 90° C.
• THWN-2- Wet or dry locations not to exceed 90°C or locations not
to exceed 75°C when exposed to oil. • THWN- Wet locations not to
exceed 75°C or dry locations not to exceed 90°C or locations not to
exceed 75°C when exposed to oil.