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The US electrical system is not 120V

Technology Connections · explainer · Watch on YouTube

Power grid, heating & buildingsHome, DIY & practical skills

What it is

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.

Why Hacker News recommends it

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

  • 4 people recommended it
  • 4 different months
  • 0 strong recommendations
  • first 2021, last 2026

What HN commenters said

  1. “Relevant video: Technology Connections”

    Explains the breaker panel and how US homes get 240V.

    kruador, 2021-11 · Recommendation · in “Museum of Plugs and Sockets”

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

    Corrects misconceptions about US electricity, good and bad.

    coreyp_1, 2022-08 · Recommendation · in “A looming copper crunch and why recycling can’t fix it”

  3. “Technology Connections (YouTube) explains this fairly well”

    Explains US 240V split-phase for large appliances.

    Rimintil, 2023-01 · Recommendation · in “A US federal agency is considering a ban on gas stoves”

  4. “Reminds me of this great Technology Connections video”

    Great video on US voltage.

    jamesbfb, 2024-09 · Recommendation · in “Serving AI from the Basement – 192GB of VRAM Setup”

Excerpts from Hacker News comments, linked to the originals. Summaries and labels were written by a language model from those comments.

Topics: split phase, 240v, breaker panel, electrical wiring, appliances

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