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Pro tip: I stopped guessing breaker sizes and started doing a 10 second math check before every panel swap
When I started doing residential service work back in 2019 I would just look at the old breaker and grab the same size off the truck. That worked fine until a job in Mesa where a homeowner had a 30 amp dryer breaker feeding a circuit with 10 gauge wire, and I almost copied it straight over. An old guy named Ray who ran the shop for 22 years pulled me aside and asked me one question: what does the nameplate say? Now I add up the load first, check the wire gauge, and match the breaker to the wire, not to whatever was there before. Takes me maybe 10 seconds with a code book and it has saved me from at least 3 callbacks. Curious if other sparkies do the math every time or if you still go off the old breaker when the wire looks right.
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parker_park81d ago
That "what does the nameplate say" line hits home, had a guy swear his AC needed a 50 when the tag clearly said 35. Saved him from cooking the compressor on a hot July day.
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