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What's The Difference Between 15 and 20 Amp Outlets?

When upgrading or troubleshooting your home's electrical system, understanding the difference between 15-amp and 20-amp outlets is crucial. While they may look similar, these outlets serve distinct ...
Ars Technica

UPS Utility Power Questions - 15Amp - 20Amp

We just got our new UPS in and it has a 120v 20Amp NEMA 5-20P plug on it. Our outlets are 120V 15Amp NEMA 5-15P. My question is: Is an adapter plug a bad idea? Or should I have an electrician come in ...