![]() Turn off the water heater's breaker (of course).Installation of the linked supply goes as follows, presuming you've already done the plumbing work to install the anode itself as per its instructions: With this, a 4" square junction box, some bare 10AWG wire and a 10-32 grounding screw to serve as a grounding pigtail, a few suitably sized wire nuts and cable clamps, a whip of 10/2 NM (or a suitable wiring method for your jurisdiction if NM isn't permitted) to go from the new box into the water heater, and a suitable cable to connect the screw-terminals the power supply provides for its output connections to your powered anode, we can solve your power delivery problems without pulling another circuit. However, the receptacle size issues aren't a problem for a hardwired power supply, and while there are a variety of options for this available due to UL 508 listed 24VDC supplies being common fare in industrial controls work, it turns out that McMaster-Carr carries a UL listed, 100-250VAC input, 24VDC output supply pre-mounted to a 4" square junction box cover for under $20. So please! Be careful because it’s all about electricity and electricity is too dangerous.Even if your powered anode's "wall wart" power supply is rated for 240V operation (likely, albeit not guaranteed), you still cannot interface it directly to the water heater circuit, as it is only designed to plug into a 15A receptacle (likely a NEMA 1-15, but even if it had NEMA 2-15 blades on it, this would still be an issue), and 15A receptacles aren't legal to have on 30A circuits, because you could overload the receptacle without tripping the breaker if you did such a thing.but with the correct power supply, this can be done The author will not be liable for any losses, injuries, or damages from the display or use of this information or if you try any circuit in wrong format.Please follow the manual instruction, local area codes or contact a licensed electrician for proper installation.Failure to do so can result in electrical shock, serious injury, fire or even death.Use the proper size of cable and wire by following this simple calculation method ( How to determine the suitable size of cable for Electrical Wiring Installation).Disconnect the power before replacing, repairing, troubleshooting, maintenance and installation electrical appliances and equipment. ![]() You may follow your regional wiring color codes i.e. Note: Red color illustrates the Line or Phase wire and Black color shows the Neutral Wire in the above figures. All the above wiring diagrams are for non-simultaneous (non-contentious) heating elements and thermostat operation. Follow the user manual guide or contact a licensed electrician for proper installation. Use 10 gauge wire for 240V and 12 Gauge for 120V breaker from the main panel box (load center or breaker panel) in the above wiring tutorials. Note: Perform a continuity test for switch terminal before wiring and installation. This configuration will work for both 120V and 240V whereas 120V will consume 25% of the total wattage rating of 4500 Watts which is 1125 Watts in case of 120V.Īdditional methods for 120V to 240V water heater and vise versa are using automatic or manual transfer switch (Change over switch), using timer (T106, T1906, T1975 ect) or SPDT timer with dry NO NC relay setting the DIP switch for 120V. To do that, just move clock motor wire from COM to NO (Normally Open) terminal. Toggle water heater between 120V and 240V using T106 Timer Down Position of DPDT Switch = L 1 and L 2 are connected (through A 2 and L 2 terminals) to the water heater = 240V AC.Up Position of DPDT Switch = L 1 and Neutral are connected (through B 2 and L 2 terminals) to the water heater = 120V AC.Do the proper grounding to the double pole double throw switch and water heater as shown below. The L2 terminal of DPDT switch should be connected directly to the water heater. ![]() L2 from CB and Neutral from main distribution board should be connected to the A2 and B2 terminal on the right side of 2 pole DPDT switch. To do that, just connect the L 1 directly to the water heater through 30A CB. ![]() The same operation can be done via two pole DPDT (double pole double through switch) as above. Toggle water heater between 120V and 240V using Double Pole Double Throw Switch ![]() Down Position of 3-Way Switch = L 1 and Neutral are connected to the water heater = 120V AC.Up Position of 3-Way Switch = L 1 and L 2 are connected to the Water heater = 240V AC. ![]()
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