Tankless Water Heater Wire Gauge

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.

Tankless water heater wire gauge.

Some large heaters draw up to 50 amps requiring 6 gauge wire. 3 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. Wire connections for a ecosmart 18 tankless water heater.

This way you are sure to protect the wire gauge of the circuit. Recommended minimum wire gauge. 1 x 30 amps. 1 x 40 amps dp.

Here is the spec sheet and your unit is a 13kw. 4 x 40 amps dp. If the existing cable is 12 2 type tn copper with tw or thw insulation then a 2pole 25amp breaker would be correct. More about electrical wiring for a water heater.

This electrical wiring project is about how to connect the wires from the circuit breakers to a ecosmart 18 tankless water heater. Details the electrical requirements for the stiebel eltron tankless water heaters including amperage electrical service required wire gauge and breaker sizes that are recommended by the manufacturer etc. 1 x 60 amps dp. Electrical wire for electrical repairs and home remodel projects.

Wires to the tankless water heater reviewing the electrical question. The water heater should not have wiring coming out of it for splicing. 2 x 40 amps dp.