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EV Wiring Electrical Question

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2023 Model Y
Jul 27, 2023
Tampa, FL
I am asking if any electricians out there can answer my question.

Tesla Wall Connector gen 3 installation:

Question: Using #6 THHN copper wire rated for 90c (194 deg) installed in a 3/4 electrical PVC conduit which is rated for 90c max BUT what if you use a flexible non metal conduit which is rated for 70c or 80c (176 deg) does this derate the 90c installation. Thanks!