I'm replacing my 240V electric water heater. I noticed the previous installer tied both the neutral and ground wire from the panel to the grounding post on the water heater, is this
![3 phase non-simultaneous water heater | Heater thermostat, Electrical circuit diagram, Basic electrical wiring 3 phase non-simultaneous water heater | Heater thermostat, Electrical circuit diagram, Basic electrical wiring](https://i.pinimg.com/474x/52/71/0e/52710ec6338b03379f9209cbf7e145c4.jpg)
3 phase non-simultaneous water heater | Heater thermostat, Electrical circuit diagram, Basic electrical wiring
![power supply - Run heater on two powerlines, where the second line is switched according to the main line - Electrical Engineering Stack Exchange power supply - Run heater on two powerlines, where the second line is switched according to the main line - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/csbw2.jpg)
power supply - Run heater on two powerlines, where the second line is switched according to the main line - Electrical Engineering Stack Exchange
![Convert 3-phase water heater to single phase: http://waterheatertimer.org/How-to-wire-water-heater-thermostats.html | Water heater thermostat, Water heater, Heater Convert 3-phase water heater to single phase: http://waterheatertimer.org/How-to-wire-water-heater-thermostats.html | Water heater thermostat, Water heater, Heater](https://i.pinimg.com/736x/10/43/69/104369f7ea404248a3a2192b2f8bc8a5.jpg)