All North American utility suppliers are set up for 60 Hz. As such, all breakers are designed for 60 Hz operation.
Although European electricity is 50 Hz, North American breakers would no doubt function well.
It is highly recommended that you employ the services of a qualified electrician for installation or modification of any electrical service.
200 amps
Yes. You'll seldom run every circuit to full capacity. The main breaker will trip if all the individual circuits exceed the 200 amp rating of the main breaker.
I am assuming by your description that the panel is protected by a 90 amp breaker and the breakers in the panel when added up is 200. This is okay as long as your 90 amp breaker trips on a regular basis. It is typical for the breakers to add up to more than the main breaker under the assumption that you would rarely be running each circuit at its maximum capacity.
200. Although you cannot exceed current ratings on any branch circuit without tripping that circuit. You need to make sure that you do not exceed 160 continuous load amps to meet NEC requirements of not overloading a breaker to more than 80% under continuous load.
No. If device draws 200 amps breaker will trip.
200 amps
200 amps
Yes. You'll seldom run every circuit to full capacity. The main breaker will trip if all the individual circuits exceed the 200 amp rating of the main breaker.
Check the nameplate on the service panel. There it will tell you what the buss capacity is. On a 200 amp service nothing in the wiring configuration is allowed to be less than that the service rating. In the market there are 200 amp 42 circuit distribution panels.
I am assuming by your description that the panel is protected by a 90 amp breaker and the breakers in the panel when added up is 200. This is okay as long as your 90 amp breaker trips on a regular basis. It is typical for the breakers to add up to more than the main breaker under the assumption that you would rarely be running each circuit at its maximum capacity.
1200 Amps is a huge breaker. Typical houses might have between 100 and 200 Amp service. Since this would have to be a very unique installation you would have to provide a lot more information before cost could be computed. You also have to indicate who is supplying the breaker which would be a significant cost on its own.
Connect the circuit to the appropriate size circuit breaker to meet the required amperage of the circuit. Turn the breaker on and use the circuit. Unless the circuit is of a very high ampacity, plus 200 amps, don't worry about voltage drop over 50 feet.
200. Although you cannot exceed current ratings on any branch circuit without tripping that circuit. You need to make sure that you do not exceed 160 continuous load amps to meet NEC requirements of not overloading a breaker to more than 80% under continuous load.
No. If device draws 200 amps breaker will trip.
If the mains is a 200 amp two pole breaker each leg can carry up to 200 amps in relationship to the common neutral of the service.
For the lighting load the amperage is A = W/V = 600/120 = 5 amps. As for what will be plugged into the receptacles will be a guess for the calculations. I will give you a full 15 amps for receptacle loads at 120 volts. Total amperage is 20 amps. The breaker for this circuit will be a 20 amp breaker but there may be a problem getting the #6 wire under the breakers terminal connection points. If this is the case use a #6 lug to connect to the breaker and connect the wire into the lug. A #6 copper conductor will limit the voltage drop to 3% or less when supplying 20 amps for 200 feet on a 120 volt system.
For an accurate calculation it will be necessary to know what the size of breaker exists in the pump house and what size conductors are used. Power loss is measured using actual amps required, not size of the circuit involved. But the size of circuit (breaker size) can be used. Voltage must also be known.