Is it normal that I have no hot water on the first installation?

Is it normal that I have no hot water on the first installation?

The electric water heater requires a heating time that varies from 20 minutes for the smallest to 6/8 hours for the largest. You must wait for this time to obtain hot water. Some models have an indicator light that shows you if the product is heating.
You can check whether the water heater is receiving an electrical current. NB: this is a professional operation and you must have the required skills.
Next, after switching off the power, you can use an ohmmeter to check whether the heating element and control thermostat are working.
Check the thermostat to see if the safety mechanism has been reset.
If you still have no hot water, call in a professional or the after-sales service.