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Just completed my install on the wall charger with 3/4 EMT conduit, 6AWG hots and 8AWG ground.
Interesting to observe that conduit actually gets warm. 60A circuit breaker even slightly hot when touched on front. Assuming this is expected?
Thanks for all the replies. A couple of answers;
- conduit is about 60ft long
- I can't access conduit in all places, but where I can it seems that the conduit is evenly warm. There is a 90 degree conduit bend near middle that actually appears to vibrate just slightly.
- split phase 240V. Have not measured yet actual or drop
- dial is set to 48A
- measuring with a simple IR tool, the circuit breaker was about 105F in the front.
Thanks for all the replies. A couple of answers;
- conduit is about 60ft long
- I can't access conduit in all places, but where I can it seems that the conduit is evenly warm. There is a 90 degree conduit bend near middle that actually appears to vibrate just slightly.
- split phase 240V. Have not measured yet actual or drop
- dial is set to 48A
- measuring with a simple IR tool, the circuit breaker was about 105F in the front.
Breaker can operate in 104 abient temp before self heating is included.
My conduit vibrates a little also. That is just normal for wiring in conduit under heavy load. It is 60 cycle hum (from the frequency of the alternating current). Not a ton you can do about it other than making sure the conduit is strapped down well enough. Backing the car charge rate down could help maybe, or over sizing the wire perhaps? But it really is not an issue.
Twine going around conductors every x feet?
I was actually thinking to use conduit seal in accessible places to dampen and hold conductors in place:
Black Electrical Tape
Not sure if this is code... I am assuming it woudl also block heat