WARNING: If you are asking this kind of question, you probably do not have the knowledge of a trained and qualified electrician. It is ESSENTIAL that you have that knowledge, both from a legal standpoint and from a safety standpoint. It is HIGHLY RECOMMENDED that you consult a properly trained and qualified electrician on this matter. In fact, most commercial installations, of which 208V certainly sounds like, REQUIRESa licensed electrician.
A load of 6500 watts at 208 volts will draw a current of 31.25 amps. For the US NEC, that corresponds to a wire size of AWG 8, which is rated for 40 to 55 amps, depending on insulation, temperature, and installation. However, 31.25 amps is close to the limit of 80% of 40 amps and, depending on code and circumstances, you might need to go to AWG 6, which would give you a rating of 55 to 75 amps.
20 amp is perfect, 15 is fine
The wire size is dependent upon the wattage size of your water heater. The higher the wattage the larger the wire size. A standard 3000 watt heater will use a two pole 20 amp breaker connected to 2C #12 wire.
15 amp
1600 watts is unusually low for electric baseboard heaters! These usually are rated at about 6000 watts.Typical electric baseboard heaters operate on 220 volts thus you heater would pull about 7.3 amperes and 16 gauge wire can easily handle this.A standard 6000 watt baseboard heater pulls about 27 amperes and needs 10 gauge wire.
Watts = Amps x Volts for a resistive load like a water heater.
20 amp is perfect, 15 is fine
The wire size is dependent upon the wattage size of your water heater. The higher the wattage the larger the wire size. A standard 3000 watt heater will use a two pole 20 amp breaker connected to 2C #12 wire.
Yes, but realize that it will take longer to reheat water as it is used. In other words the recovery time will be a bit longer.
15 amp
A 50 watt heater is major over kill for a 3 gallon tank, a 10 watt heater is more than enough for a tank that size. You will nuke your aquarium very quickly the first time the 50 watt heater sticks on, with a 10 watt heater if it sticks on the aquarium temp will only raise a degree or two.
Yes you can.
1600 watts is unusually low for electric baseboard heaters! These usually are rated at about 6000 watts.Typical electric baseboard heaters operate on 220 volts thus you heater would pull about 7.3 amperes and 16 gauge wire can easily handle this.A standard 6000 watt baseboard heater pulls about 27 amperes and needs 10 gauge wire.
Watts = Amps x Volts for a resistive load like a water heater.
20 amp
A 1000 watt generator cannot run a 1500 watt ceramic heater without having problems.
The average size water tank is 4500 watts. The generator's supply will be large enough to operate the water tank. Larger tanks over 5000 watts will not heat correctly.
A 2000 watt heater draws 8.3 amps on a 240 v supply, so the cutout should be set to 10 or 12 amps. <<>> In North America a 2000 watt baseboard heater will be fed with a two pole 15 amp breaker. A two wire cable of #14 copper will be used to connect the supply voltage to the heater.