NicoleC
New member
Nicole-the meters only go up to 15 amps because it's only safe to load a circuit with 75% of it's rating if I remember correctly. So even a 20amp circuit shouldn't have more than 15 amps running through it...
It's safe to draw 20amps from a 20amp circuit. The guideline is to only add 75% because people don't remember what's on the circuit, and not everything's power consumption is labelled correctly. It's a margin or error for safety reasons.
My ancient gas furnace is on a dedicated 20 amp circuit, and I really wish I knew how much power the blower draws... that's about the only thing that I'd have in my house that isn't on a 220v circuit that would draw that much power. My hot water heater and AC are on 30 amp 220 circuits; I have a newer gas dryer, oven and garbage disposer so they don't pull much.