In North America the cable used for wiring a hot water tank is two conductor #12. It is rated at 20 amps. This is for a normal 4000 watt tank. Larger wattage tanks will of course take a larger size conductor due to the greater current draw. These tanks require a 240 volt supply. To find the amperage of your tank use this equation; Amps = Watts/volts
What do you mean by hot water system? If you mean hot water tank than a three wire hot water tank means that its 220 volt electric. If you have to ask than don't touch it
So the tank is grounded.
10 awg
I do not have a hot water tank, so I have never had a hot water tank flush performed.
The hot water tank might be undersized for your usage.
do they help with hot water tank replacement
how long does it take for hot water after lighting water tank its gas?
No, a hot water tank heats water by itself.
So the steam can rise from the boiler to the hot water tank storage
You will get warm instead of hot water. There is a tube inside the tank on the cold side that goes to the bottom of the tank and the hot comes directly from the top. Reverse them and you are going to get the cold water that settles to the bottom of the tank. It will not hurt the tank or anything, it just makes for poor hot water.
No, a hot water tank heats water by itself.
A hot water tank works by storing and heating water inside an insulated tank using electricity or gas. When a hot water tap is turned on, the hot water is released from the tank and replaced by cold water that is then heated up for future use. This cycle continues to provide a steady supply of hot water for household needs.