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The US electrical system is not 120V

55 videos recommended on HN
YouTube
4 HN users recommended this explainer4 months2021–2026 score 4
Years with an HN recommendation, 2007–2026

HN commenters point to it to correct misconceptions about US voltage and to explain 240V availability in American homes.

Technology Connections explains that US household power is split-phase, with two 120V legs that combine to 240V for large appliances. It covers the breaker panel and how the system works.

“There's a lot of misconceptions about US electricity. This video does a nice job at pointing out the good and the bad.” (HN, 2022)

4 recommendations · 4 citations · Explainers · intro

8 Hacker News comments

From the HN archive; up to 20 kept per video, favoring different commenters. Recommendations first.

@kruador Nov 2021 Recommends
on HN thread Museum of Plugs and Sockets
Relevant video: Technology Connections, "The US electrical system is not 120V", where there is a (long) discussion of how the breaker panel works and how you get 240V. [this video]
Explains the breaker panel and how US homes get 240V.
@Rimintil Jan 2023 Recommends
on HN thread A US federal agency is considering a ban on gas stoves
Single family homes in America are 240v rails for large appliances, like stoves/ovens, furnaces, and dryers (two-phase). Technology Connections (YouTube) explains this fairly well: > [this video]
Explains US 240V split-phase for large appliances.

Citations, criticism and jokes

@kibwen May 2026 Cites it
on HN thread California leaders report four to six weeks worth of gasoline and diesel supply
> Also our infra not being 240v is hurting us. The rest of the world can just plug in overnight to any regular outlet and it is good enough for almost any commute. US homes don't need any significant accommodations for 240 volt infra. Plenty of US home appliances are already 240 volt; this is a solved problem. [this video]
Shows US homes already have 240V.

Video list and Hacker News comment labels from HackerTube (prompted by @karpathy), released under ODC-By 1.0, built on the open-index/hacker-news archive. Hacker News data is provided by Y Combinator; comments remain the work of their authors. Video titles, channel names and thumbnails belong to their creators and are shown via YouTube. HackerTube Watch is an unofficial edition. Data export of 2026-10-31.

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