Wire Size to a Miscellaneous Panel

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BayElectric

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Location
Bay County Fl
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Electric
Hello,

I'm required to change a miscellaneous panel, and in it there are 50A two pole breaker for irrigation pump, single pole 20A breaker for irrigation control, and two 20A single pole breakers for service outlets. I can't see the load or OCP on the pump since it submersible.
What is the minimum size wire allowed from the meter socket to the panel should be installed?
Thanks,
 
BayElectric said:
Hello,

I'm required to change a miscellaneous panel, and in it there are 50A two pole breaker for irrigation pump, single pole 20A breaker for irrigation control, and two 20A single pole breakers for service outlets. I can't see the load or OCP on the pump since it submersible.
What is the minimum size wire allowed from the meter socket to the panel should be installed?
thanks,
Click to expand...
The required OCPD or wire size cannot be calculated with the information you have presented.

If this is a 3 wire system (L1, L2, N) then worst case if you have 2 single pole breakers on one line, and one on the other would be 90 A.

I would be inclined to replace the panel with a 125 A main CB panel and bring in service conductors of #2 Cu or 1/0 Al. But that is just me.
 
BayElectric said:
Hello,

I'm required to change a miscellaneous panel, and in it there are 50A two pole breaker for irrigation pump, single pole 20A breaker for irrigation control, and two 20A single pole breakers for service outlets. I can't see the load or OCP on the pump since it submersible.
What is the minimum size wire allowed from the meter socket to the panel should be installed?
Thanks,
Click to expand...
What size conductors are in the existing panel?

Roger
 
BayElectric said:
It's a service for the irrigation pump and control.
Click to expand...
Are you looking to have this metered separately then? POCO may gave criteria for minimum size of service, that is partially a seperate factor from the loads applied.

If there is no physical evidence of overload, putting a amp meter on pump feeder and reading the running load can give you an idea for the size and if original installation was adequate. I would expect that it was done correctly, and the metering would confirm or disprove this.
 
BayElectric said:
Well......just seem too small for #6 to feed #6, the control and a service outlet.
Click to expand...
Unless you can get more info concerning the loads it would be a pretty safe bet that what's been working will be fine.

Roger
 
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