I have a 240v, 48amp (60 amp breaker, 6 awg NM-B wire) car charger outside that has a disconnect inline and last night I noticed a really weird smell in the room the wires to out to the charger from. I tracked it down using my nose to the disconnect box (or the wires leading to/from it) and at this point it was pulling 48 amps because the car was charging. I inspected the area and didn't notice any melting but since it was raining I didn't want to open the box outside to look in. I lowered the amps to 32 via the car and the smell appeared to dissipate and this morning the smell was gone. I also noticed a small humming sound from the disconnect outside at the same time.
It's a cheap disconnected: https://www.homedepot.com/p/GE-60-Amp-240-Volt-Non-Fuse-Metallic-AC-Disconnect-TFN60RCP/100674085?cm_mmc=Shopping%7CG%7CBase%7CD27E%7C27-8_CIRCUIT_PROTECT._DEVICES%7CNA%7CPLA%7c71700000034238981%7c58700003943782709%7c92700031956831784&gclid=Cj0KCQiA28nfBRCDARIsANc5BFA1htTEn9RLX9o9ot_7y6wyo4sEOySek6WKOL1FbEizxiqgrYyPfHgaAqE_EALw_wcB&gclsrc=aw.ds
But it's rated to 60 amps. Maybe something is lose, what would cause a smell/buzz? What should I check first?