ThirdGenPump
In the Trades
I assume the #10 wire was for the 3HP option(max 609ft controller to motor). He has to upgrade to the #8 for the 5HP(max 539ft controller to motor).
For a single phase 5hp Goulds says max 507ft on #6. We don't know how fat the well is from the house though. I'd probably look at #4 between the house and well and #6 in the well.
I always put 5HPs on galvanized. Yes it rusts but it takes a very long time. It's rare that I'm pulling a pump for pipe failure, on the ones that have the installations have been 20years plus. I'd reconsider and use PVC on any well that I was replacing earlier due to pipe. PVC fails too as it gets brittle with age and cracks. Water quality varies so mileage will vary. The galvanized is getting cheaper than the old stuff so I expect I'll be forced over to PVC more often, but that hasn't happened yet, so I'll hold out with my galvy installations till I see more problems with it.
To the OP you've never really covered what you want to use this well for. If you just want to run a household you'd be fine with a 3HP, it can pump to the depth but flow will drop off as the water level pulls down. I usually blow the well out at a few different depths to get an idea of what the water level will maintain. I doubt flow would every be less than 10gpm at depth which you wouldn't notice unless you were doing a lot of outside watering. A 5HP can take advantage of your wells maximum yield, if you're going to be doing a lot of outside watering or agriculture you'd want the 5HP.
Mandatory- I would never install a VFD for someones potable supply, I tell people who want them for that application they should find another installer. I do occasionally use them for irrigation supply. I expect the controllers to fail and need to be replaced. It's not worth having customers pissed off because they can't shower due to unreliable equipment, if it's a luxury expense like watering their lawn they are a little more willing to wait for me to get a replacement controller and swap it out.
For a single phase 5hp Goulds says max 507ft on #6. We don't know how fat the well is from the house though. I'd probably look at #4 between the house and well and #6 in the well.
I always put 5HPs on galvanized. Yes it rusts but it takes a very long time. It's rare that I'm pulling a pump for pipe failure, on the ones that have the installations have been 20years plus. I'd reconsider and use PVC on any well that I was replacing earlier due to pipe. PVC fails too as it gets brittle with age and cracks. Water quality varies so mileage will vary. The galvanized is getting cheaper than the old stuff so I expect I'll be forced over to PVC more often, but that hasn't happened yet, so I'll hold out with my galvy installations till I see more problems with it.
To the OP you've never really covered what you want to use this well for. If you just want to run a household you'd be fine with a 3HP, it can pump to the depth but flow will drop off as the water level pulls down. I usually blow the well out at a few different depths to get an idea of what the water level will maintain. I doubt flow would every be less than 10gpm at depth which you wouldn't notice unless you were doing a lot of outside watering. A 5HP can take advantage of your wells maximum yield, if you're going to be doing a lot of outside watering or agriculture you'd want the 5HP.
Mandatory- I would never install a VFD for someones potable supply, I tell people who want them for that application they should find another installer. I do occasionally use them for irrigation supply. I expect the controllers to fail and need to be replaced. It's not worth having customers pissed off because they can't shower due to unreliable equipment, if it's a luxury expense like watering their lawn they are a little more willing to wait for me to get a replacement controller and swap it out.