We are currently building a greenhouse, and I need to run about 240 foot of wire from the pole to the greenhouse breaker box. The greenhouse will have 2- 115/230V fans drawing 6.0 amps each, 3- 1/3hp sump pumps not sure of the amperage yet but will be 115v, LP gas instant hot water heater, 10 heater coils. Heater coils are 115v but the motors do not say how many amps they draw, just that they draw less than two amps each. So my question is, what size wire do I need to buy for this project? Mainly just the service wire from the main box and meter to the new box in the greenhouse. Also I would like to run this service underground. Thanks for the help,