2019年6月18日 · 220 wasn't even the original voltage. It was 200, or to be more precise 100/100 split phase, and 500V for streetcars. It was also DC. A bump was made to 105V etc. in coordination with light bulb makers. Then another bump to 110/220/550, and then, power companies yielded to the inevitable and switched to AC.

2024年1月11日 · 220-240v in the U.S. is 2 legs of a single phase. The 2 legs come off the transformer and have a center tap (the neutral) each leg to neutral is 120v or 240 leg to leg. If it were part of a multi phase phase system the leg to leg value would not be the same as adding each leg to neutral voltage. –

Note, also, that you can perfectly well plug a 15 amp plug into a 20 amp outlet. I have exactly that situation 3' from me--I had an electrician run an extra line, it feeds two pairs of 20 amp outlets (the cost of two pairs of 20 amp outlets vs a single pair of 15 amp outlets was only a few dollars.)

2020年1月1日 · I have a 240 V line in my kitchen for an oven. We are remodeling the kitchen and moving the oven and, thus, need to move the 240 V outlet. Can I extend the line by joining cables in a junction box...

2024年3月28日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

2013年12月12日 · About the only time you use an outlet that isn't a 5-15 or 5-20 is when you are using more than 20 Amps or need 220/240 volts. The main reason is that our cords don't have a fuse in them, to prevent people from plugging in a cord that would melt before the breaker trips.

2016年2月6日 · I am replacing an in-wall oven with a oven/stove. The wiring in the wall is a 2 wire #6, and a ground wire. One of the wires has red arrows on it, the other solid black. (obviously 220V) and I traced

2024年5月9日 · From the 2017 National Electrical Code: 210.19(A)(2) Branch Circuits with More than One Receptacle. Conductors of branch circuits supplying more than one receptacle for cord-and-plug-connected portable loads shall have an ampacity of …

2014年5月19日 · I don't understand the difference between household 240 and 3 phase 240. Isn't household 240 just two 120 phases, making 240V two-phase? If so, wouldn't three phase just be 360v? How, then, is ther...

2020年8月23日 · Notice the 2 larger wires on the outside those are normally the hots the center wire is the neutral for 3 wire without ground because the heating element is 220-240 and the motor that turns the drum is usually 120v and the controls are 120v in these cases the best option is a grounding connection from the metal water pipe to the frame of the ...