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The easiest way to calculate how many outlets and lights you can have on your circuit is to put one outlet per 1½ amps and then multiply the total amps by 80% to account for your circuit breaker’s max capacity. If you have a 15-amp circuit, that means you can have up to eight outlets or lights. If you have a 20-amp circuit, you can have up to 10 outlets.

Systems should be checked every 2-3 years or whenever signs of age appear, maintaining network integrity and safety at all times.

In the majority of cases, you can replace an outlet with a USB outlet. USB charging receptacles install in the same spot as standard outlets and any electrician worth their salt is more than familiar with the replacement process. Additionally, it’s possible to replace yourself, but only if you have prior experience with your home’s electrical system, as it requires handling of wires.

GFCI stands for ground fault circuit interrupter, which means it has the ability to detect a ground fault and shut the circuit down before it creates hazards. General breakers may also do that because ground faults can cause overloads, but they’re more focused on amp overloads from any cause. GFCIs are often installed in specific outlets, but breakers can come with GFCI capabilities built in for broader ground fault protection.