News for hackers. Stuff that matters.

A comment on Why does the USA use 110V and UK use 230-240V?. Parent comment

Re:Why does the USA use 110V and UK use 230-240V? by linsomniac on Tuesday August 29, 2023 @03:37PM (#37312802)
I thought residential US service was 240V split phase with two 120V legs.

I've heard for some wet construction locations they'll set up 120V split phase with two 60V legs, to keep the potential to ground smaller.

[ Parent | on HN ]
Re:Why does the USA use 110V and UK use 230-240V? by bootlooped on Tuesday August 29, 2023 @03:44PM (#37312884)
When talking about the voltage of US residential service, and the devices that use it, 240 and 220, and 120 and 110 are functionally the same. The house theoretically has 240v and 120v power, but voltage may sag throughout the home's wiring, and some outlets will a real voltage reading lower than 240/120.
[ Parent | on HN ]