what is the difference between the two wires in an AC circuit, if the current is constantly switching direction? E.g. why do they say to always put the switch on the “hot” side?
In: Engineering
Yeah, you’d get a single 240v phase. But if that’s what you’re after and you are willing to use a transformer then a step up transformer starting with a single phase would be so much simpler. The draw of hacking together 2 extension cords is you can get 240v with just a few bits of wire and wire nuts. It’s cheap and doesn’t require any extra components.
What all of this won’t get you is 240v 2 or 3 phase power though. Which is used in non-residential things. So if you have some industrial machinery that has a 240 3 phase motor you’d need something entirely different.
So in summary there are very few situations where hacking together your split phase power is even useful and if you are going to use a transformer then a step up running from a single phase is the best answer anyways.
Edit: like this https://www.amazon.com/dp/B000MX50KA/ref=cm_sw_r_cp_awdb_t1_80OWEbD9CTD87
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