Tankless Water Heater Wire Gauge

This electrical wiring project is about how to connect the wires from the circuit breakers to a ecosmart 18 tankless water heater.

Tankless water heater wire gauge. More about electrical wiring for a water heater. Here is the spec sheet and your unit is a 13kw. This way you are sure to protect the wire gauge of the circuit. 2 x 40 amps dp.

Wire connections for a ecosmart 18 tankless water heater. 1 x 40 amps dp. There should be terminals on the bottom of the unit which would accept a minimum of 6 gauge wire 240 volt coming from a 60 amp double pole breaker. 3 x 40 amps dp.

1 x 60 amps dp. 3 x 40 amps dp. For example a 20 amp hot water heater needs 12 gauge wire a 25 amp hot water heater requires 10 gauge wire and a 30 to 40 amp hot water heater requires 8 gauge wire. Electrical wire for electrical repairs and home remodel projects.

If the existing cable is 12 2 type tn copper with tw or thw insulation then a 2pole 25amp breaker would be correct. I bought an ecosmart 18 tankless water heater. Wires to the tankless water heater reviewing the electrical question. 4 x 40 amps dp.

Some large heaters draw up to 50 amps requiring 6 gauge wire. Recommended minimum wire gauge. The water heater should not have wiring coming out of it for splicing.