Wire And Breaker Size For Electric Water Heater

101 vancouver washington 98665 how to calculate breaker size wire size and wattages the chart below will help you determine fuse or breaker size and the necessary wire size to service various wattage loads.

Wire and breaker size for electric water heater.

A 1500 watt heater on a 120 volt circuit thus needs a breaker of 15 6 amps. Electric water heaters require a 240 volt dedicated circuit which serves only the water heater and no other appliances or devices. G g electric plumbing at 1900 ne 78th street ste. In the above example we would require a 15 6 amp circuit breaker for our us readers.

My electrical wiring project involves change the wiring a water heater in the bathroom of a mobile home. An acquaintance has an older mobile galvanized branch water lines and his water heater. 40 gal 240v dual 4500w 18 75a connected to the. Some large heaters draw up to 50 amps requiring 6 gauge wire.

Multiply the value for current by 125 percent to determine the size of the breaker you need for the heater. What is the right circuit breaker and cable for an electric water heater. When placing multiple heaters on a circuit do not exceed the wattage listed for the corresponding wire and circuit breaker size. Understanding water heater wiring.

To protect against material failures the national electric code. Most home hot water heaters are powered by a 240 volt circuit. 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. It is extremely important that the circuit be off when wiring an electric water heater.

Model recommended breaker maximum amperage 240v recommended household electric service recommended minimum wire gauge. These 3 heaters would require 12 2 wire and a 20 amp 2 pole breaker if they were to all be placed on the same circuit. At the water heater the black circuit wire connects to the black wire. 4 x 40 amps dp.

Wire a hot water heater with wire that s sized to accommodate the heater s current requirement. Now in order to choose an electric breaker multiply the current draw of the water heater with 125 per cent in order to determine the size of the breaker you will need.