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Ran phone line and power in the same 2 gang box for 6 years before a panel swap in Boise tipped me off
Tech from the supply counter took one look at my trim plate and pointed at the hum on the keypad, said I'd been begging for crosstalk the whole time. Now I keep low volt and 120 runs 6 inches apart minimum, anyone got a rule of thumb they actually stick to?
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burns.fiona2h ago
Stuff like this always reminds me of how many houses are wired by feel instead of by the book. Somebody runs a wire, it works fine, so they figure it's fine forever, same as people who never wear a seatbelt because they never got in a crash yet. The hum on your keypad was basically the house telling on itself, only nobody was listening. Six years is a long time to get away with it, so honestly you got lucky more than anything. The 6 inch thing is what most folks land on, but keeping them in separate stud bays or using a divider is really the safer bet. Your mileage may vary depending on the run length and what's on the circuit, but close parallel runs are where the noise sneaks in.
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