Hi I just replace a 240 volt water heater element in my rental property. the air handler had leaked water on top of this unit a week before. the tenant call and said no hot water. I turned off breaker and install new 240 /3000 watt element. hooked up wires to same. turned on breaker to check, and could only get 120 volts from screw from element and grounding to tank, open up wire connection box saw water sitting in this location, dryed out and removed wire nuts to expose bare wire turned on power to check voltage. show at 30 volts. reconnected with new wire nuts and still get 120 volts at element to tank ground. the breaker is a two 20 amp on a single throw switch. Do you think this is a bad breaker shorted out by water leaking into wire connection box?
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