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Two water heaters on one 30 amp breaker |
| 2 electric heaters on 1 circuit breaker | |
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Two ordinary residential
non-simultaneous water heaters on one 30 amp wire and breaker Wiring illustration Applies to electric water heaters only Important: install upper thermostat in place of Lower thermostat This will give ECO protection to lower thermostat You want to heat tank #1 first... and then tank #2 Or you can wire each one separately using 2 separate circuit breakers and 10 gauge wires  Buy 36" drill bits fish bits Resources: How to install water heater thermostats Add another thermostat to water heater How electric water heaters work |
 Actual installation photo. Larger image |
 Where to connect wires going to second tank. Actual installation photo. Larger image |
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1 ordinary
non-simultaneous and 1 redundant water heater on
one 30 amp wire and breaker Applies to electric water heaters Electric: Install upper thermostat in place of Lower thermostat This will give ECO protection to lower thermostat You want to heat tank #1 first... and then tank #2 Or you can wire each one separately using 2 separate circuit breakers and 10 gauge wires Resources: How to install water heater thermostats How to wire water heater thermostats Convert 240 volt water heater to 120 volt Add another thermostat to water heater |
Larger image |
1 ordinary
non-simultaneous and 1 redundant water heater on
one 30 amp wire and breaker Applies to electric water heaters Electric: Install upper thermostat in place of Lower thermostat This will give ECO protection to lower thermostat You want to heat tank #1 first... and then tank #2 Or you can wire each one separately using 2 separate circuit breakers and 10 gauge wires Resources: How to install water heater thermostats How to wire water heater thermostats Convert 240 volt water heater to 120 volt Add another thermostat to water heater |
| Timers for 2 electric heaters | |
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Timer or
Zwave or Wifi Two 30-40 amp devices of any type Each water heater can have different schedule Resources: Compare Water heater timers EH40 water heater timer 40 amp Zwave controller 40 amp Wifi controller |
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 One timer for 2 water heaters10,000 watt, 40 amp GM40 series timer. Use 40 amp circuit breaker and 8 gauge wire from breaker box Use 8 gauge wire between timer terminals Use 8 gauge or 10 gauge wire to each water heater Do not mix different gauge wires under same screw terminal or smaller gauge wire can come loose and become fire hazard. Buy: GM40AV 120-208-240-277V Resource How to wire GM40 series timers |
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