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Thhn Wire Ampacity Chart

Thhn Wire Ampacity Chart - The plain thhn had a higher temperature rating, significant when the conductors carry close to their rated amperage or the conduit or a drilled hole is stuffed with wires close to. Requirements for over 1000 volts,. Just want to make sure i have this right, if. Single conductors specified in table 310.104 (a) shall. Thhn is rated for 90 degree c and thwn is rated for 75 degree c but both of these ratings can be listed on the same wire. The only nec reference i've found for conductor bending radius is only for 1000v (600v in earlier versions) or greater. Thhn is what we typically use and it is rated for 90 degrees c. I understand that almost all terminal s have 75 degree rating but how does that affect the ampacity of the wire. Southwire could make this clearer by putting on the product label. However, after looking in the code book, article 300.3 (a), states:

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