3 ms·
I’m curious to hear more about the difficulty of breaking DC current. I was also thinking planning to research more into GFCI for DC current. Seems like it’s p
by ccorcos 3y ago
I’m curious to hear more about the difficulty of breaking DC current.
I was also thinking planning to research more into GFCI for DC current. Seems like it’s possible if you tie the negative terminal to ground just like with AC but that feels weird to me. I guess cars usually have the negative terminal tied to the chasis so it seems reasonable.
Low voltage, high amperage is definitely going to cost a lot in cabling though, that’s for sure.
My understanding is that the only reason AC is preferred to DC for transmission is because it’s easier to transform. But rectifying is super simple and cheap — I wonder what the primary drawbacks are of using DC in homes…
- jacquesm 3y agoAC goes through zero 50 or 60 times per second so that helps you to interrupt a running current. DC runs steadily, continuously so if you try to break a DC current it will arc like mad and with a bit of luck you'll end up losing your contacts the very first time you try to break the circuit under load. DC in homes is not used because lots of gear relies on the AC frequency to provide a rotating field (easy to achieve with a capacitor).