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How can you tell if the three wires coming out of your water heater are for 110v or 220v?
Wiki User
∙ 15y ago
The very best way is to look for a data plate on the water heater. It will list the operating voltage as well as the wattage. If there is no data plate, you could remove the cover on the side and look at one of the heating elements. The voltage rating is usually stamped on the element somewhere. You should also note the color of the three wires. One of them will be either green or bare. If one of the remaining two wires is white, then there is a good possibility the heater is 120V. If neither of the two wires is white, then you may have a 240V unit. You do NOT want to rely on just the wire colors, though. Find the voltage rating on the unit somewhere.
Wiki User
∙ 15y ago
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