I guess with 78 views of this post, your wondering why still no answer.
Thanks for reply. I was beginning to think I stumped the panel.
You can do your own voltage drop calculations here:
Voltage Drop Calculator
Long distance feeders are a problem, esp trying to deliver 120/240 volts this distance of 200 to 250 feet.
First off, 50 foot difference is too much, provide one distance that is accurate.
Currently working on site plan. Actually, roughly figuring I can probably reach w/ 142'
Sizing the ampacity of the panel is a problem, as we need to know more detail from the list of loads you provide, and what would be the max load in amps at any one time.
It is unlikely that both lifts, water pump, battery chargers and blenders etc. will all be on at the same time. My concern is having enough power available in case someone flushes the head while I'm raising my boat and the fridge comes on when someone is grabbing a beer out of the fridge!
The size panel is somewhat irrelevant until the max load is determined.
I suspect that a 100 amp panel and feeder will be fine.
What I was thinking about installing
However to size the feeder conductor is the issue to insure there is 120/240 volts +/- 3 % at the panel with such a long feeder.
The amount of voltage drop will be completely dependent on the max amp load.
You have 2 in conduit to deal with, which should be large enough.
What do you want to use, copper or aluminum wire? Copper wire can be smaller than aluminum, but you need to be ready to afford to purchase this length of wire. Aluminum is cheaper, will need to be larger compared to the same ampacity copper wire.
No preference. Which ever cost the least. It all works the same in end. I like the idea of running aluminum for the main run and tie in copper at junction boxes at the house and bank/seawall where the conduit is currently stubbed out
What is the voltage of the loads?
Everything is 120v except water pump which is 240v.
Using the calculator I provided, you can enter assumptions of the various data.
For example, if you need 30 amps of 120 volt loads,which I think is a reasonable assumption, at 250 feet, you will see that #1/0 aluminum will be needed.
This brings up another issue. If you use a 100 amp rated panel, the termination connectors will not be large enough to handle the large wire needed to reduce the voltage drop, so some method of reducing wire size at both ends will be needed.
Or you can use a 200 amp rated panel, will have larger wire connectors to accept the larger wire feeder, and protect it with a 100 amp breaker.
First need to make a decision on what the max load amps at what voltage to begin sizing this long feeder.
I'm almost certain max load will be < 100amps. I would rather have a little more than not enough.
I guess I do not have the specific information as I have not started the house yet.
Quote:
Originally Posted by
tkrussell
I guess with 78 views of this post, your wondering why still no answer.
Thanks for reply. I was beginning to think I stumped the panel.
You can do your own voltage drop calculations here:
Voltage Drop Calculator
Long distance feeders are a problem, esp trying to deliver 120/240 volts this distance of 200 to 250 feet.
First off, 50 foot difference is too much, provide one distance that is accurate.
Currently working on site plan. Actually, roughly figuring I can probably reach w/ 142'
Sizing the ampacity of the panel is a problem, as we need to know more detail from the list of loads you provide, and what would be the max load in amps at any one time.
It is unlikely that both lifts, water pump, battery chargers and blenders etc. will all be on at the same time. My concern is having enough power available incase someone flushes the head while I'm raising my boat and the fridge comes on when someone is grabbing a beer out of the fridge!
The size panel is somewhat irrelevant until the max load is determined.
I suspect that a 100 amp panel and feeder will be fine.
What I was thinking about installing
However to size the feeder conductor is the issue to insure there is 120/240 volts +/- 3 % at the panel with such a long feeder.
The amount of voltage drop will be completely dependent on the max amp load.
You have 2 in conduit to deal with, which should be large enough.
What do you want to use, copper or aluminum wire? Copper wire can be smaller than aluminum, but you need to be ready to afford to purchase this length of wire. Aluminum is cheaper, will need to be larger compared to the same ampacity copper wire.
No preference. Which ever cost the least. It all works the same in end. I like the idea of running aluminum for the main run and tie in copper at junction boxes at the house and bank/seawall where the conduit is currently stubbed out
What is the voltage of the loads?
Everything is 120v except water pump which is 240v.
Using the calculator I provided, you can enter assumptions of the various data.
For example, if you need 30 amps of 120 volt loads,which I think is a reasonable assumption, at 250 feet, you will see that #1/0 aluminum will be needed.
This brings up another issue. if you use a 100 amp rated panel, the termination connectors will not be large enough to handle the large wire needed to reduce the voltage drop, so some method of reducing wire size at both ends will be needed.
Or you can use a 200 amp rated panel, will have larger wire connectors to accept the larger wire feeder, and protect it with a 100 amp breaker.
First need to make a decision on what the max load amps at what voltage to begin sizing this long feeder.
I'm almost certain max load will be < 100amps. I would rather have a little more than not enough.
I guess I do not have the specific information as I have not started the house yet.
