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In many home electrical panels, what does the main breaker do?

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  1. Cuts power to the whole home at once
  2. Resets every tripped breaker automatically
  3. Measures how much electricity you use

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References

  1. CPSC Guide to Home Wiring Hazards (Pub. 518) www.cpsc.gov/s3fs-public/518.pdf Checked 2026-10-10.

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