![]() ![]() For me the biggest reason is this way you are 100% future proofed if you need to pull larger wire later (car chargers get more powerful). I finally trained the electrician that wires the homes I build to run conduit and pull single THHN wires for our car chargers, it costs a bit more than romex, but the wire has better insulation. On car charger circuits the wire gets pretty warm, and if in the summer time with a hot ambient weather you can reach the tested limits of the wire insulation. If you are running a 240V welder at 50A, that's 50A per leg (& nothing on neutral.) 240V uses both legs. That is really lame and goes back to the electricians understanding of continuous load circuits. If your compressor and tablesaw are 120V, consider changing them to 240V, unless you also haul them off to jobsites that don't have 240V available. ![]() If the panel is almost full, and you have to move a breaker to make space for the double-pole one, don't forget to balance the load between the two hot buses for safety and efficiency. If your EVSE calls for a 50 amp breaker, its fine to run a 50 AMP breaker regardless of the EVSE current as that means the device has been tested and approved on 50 AMP circuits, In that case, I would only run a 40 AMP breaker to protect 8ga copper wire if that is what you ran? Most electricians often try to run the cheapest wire possible to do the job (I never understood this mentality) and I have even seen some aluminum wire on car charger installations. Installing a double-pole 50-amp breaker is normally a job for an electrician, but a competent homeowner can do it. Work during the daytime as you will need to shut off all power. Breaker should be sized for the load always, and a home inspector should not call out a 40 Amp breaker driving a NEMA 6-50 or 14-50 as that is not a violation of code, those outlets are typically rated for a "maximum" of 250V and 50 Amp. 1.To wire a new circuit, identify an open slot in your breaker box for a new circuit breaker. Whatever the reason, when a breaker fails, removing the old one and installing a replacement is the cure. ![]()
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