1650W power electric water heater. The instruction says "no use of mobile outlet". Why? Where is the danger?
For example, the A board has a current rating of 3 amperes, and the B board has a current rating of 15 amperes. The current of the water heater is 10 amperes. Then the A board will heat up, produce an electric spark, or even burn it. So you'd better not do that.
Different rows of plug on the current standards are different, electric water heater operating current is large, and some low quality of the plug in the current work, the cable will be significantly hot, it is recommended to buy a good quality cable long dedicated wiring.
The capacity of a mobile outlet is generally 5A, and the current of your heater is over 8A. So it's not safeFever is the cause of the contact resistance between the socket and plug the water heater, not safe
Large power electric water heater, and the power line plug is fine, easy to burn the power plug socket or a water heater, a connecting line should be properly, the power socket is best with a 16A switch, do not use the water heater, directly to the switch on it.