Was helping friend to change his deep water well pump,220 volts,3/4 H.P,most of these i have seen are wired with a yellow three wire from the pump to the pump switch on the water tank and are stranded.His was wired with a yellow three wire,220 volts from the pump up to the top of the caseing,where they installed the pump switch and used a coiled water tubeing to connect to the pitless adaptor to work the switch.From the switch they ran a 220 line underground,grey color,solid,three wire to the fuse box inside house.Ok my ? is which wire is better for this use? Solid or Stranded?
The biggest difference in solid and stranded is the flexibility of stranded. It is easier to pull and bend. One does not handle more amperage or voltage than the other, unless you get into fine stranded cable like a battery or welder, which are not used as building wire.