No, not really. The two hot legs can be opposite legs of a 120/240 V split phase power source. You still do need a protective earth ground, however, but the heater itself does not require a grounded neutral to run.
A stove, dryer, water heater, furnace, heat pump.
Any ground wire has to be connected to an independent ground wire that returns directly to the distribution panel and not to the neutral of the circuit.
Your 240-volt wall heater typically doesn’t have a common or ground wire because it operates on a two-wire system, using two hot wires for the 240-volt supply. In this configuration, there is no need for a neutral wire (common) since the heater is designed to use both hot wires to function. Additionally, many 240-volt appliances are double-insulated, which reduces the need for a grounding wire. However, if local codes require grounding, you may need to ensure that the installation complies with safety standards.
VOLTS x (VOLTS/OHMS) = WATTS 240 X (240/8) = 7200 Watts = 7.2KWatts
To calculate the amp draw for a 3800-watt water heater at 240 volts, use the formula: Amps = Watts / Volts. Thus, the amp draw would be 3800 watts / 240 volts, which equals approximately 15.83 amps. Therefore, the water heater draws about 16 amps.
The recommended voltage for a 4500 watt water heater element is typically 240 volts.
This will pull 20 Amps continuous so you will need a 30 A breaker and 10 AWG wire. You would have Black, Red, White and Ground. The 240 V would be on the black and red connected to the output from a two pole 240 A breaker. White would be neutral and green or bare wire would be ground.
A 50 gallon electric water heater with 2 elements is typically connected to a 240 volt power supply. Each element is designed to run on 240 volts to efficiently heat the water in the tank.
no
20 amp
No. A water heater requires a 240 volt connection and cannot be re-wired to run on 120 volts. There isn't enough amperage in 120 volts to power the heating rods that are inside.
In the USA houses would have 120/240 volts. 120 volts at most receptacles and lights and 240 volts for larger equipment like your stove, dryer, hot water heater.