eli5: How Can Electric Company Maintenance Affect Digital Clocks

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Today our hydro power company released a statement: “We’ve heard from many customers asking why clocks skipped a few minutes this morning. This was due to our system balancing to match customer demand following a period of high frequency overnight. We want to reassure this wasn’t a result of system/equipment related issues.”

When I checked around the house my alarm , microwave and oven clocks were all 8-10 minutes ahead but my PC and Keurig coffee maker were fine. How can this system balancing change what time some clocks are displaying and why does it only affect certain devices?

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Anonymous 0 Comments

thank you everyone for your replies! the fact that household clocks are using the electrical current to measure time is news to me and I learned a lot!

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