grounditplease
Member
- Location
- Florida panhandle
30 ampRV,120v single phase 3 hp motor,120v single phase12 amp pool pump,120v single phase6.5 amp saw......service is 100 ft from the EQ....Feeder size?
feeder size
- Thread starter grounditplease
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grounditplease
Member
- Location
- Florida panhandle
hello
hello
By the way,I forgot to say hello....looking for a website to communicate with fellow patrons of the industry...hoping this is it:}
hello
By the way,I forgot to say hello....looking for a website to communicate with fellow patrons of the industry...hoping this is it:}
kwired
Electron manager
- Location
- NE Nebraska
120 volt feeder or 120/240 volt feeder? What is likelyhood of all mentioned equipment operating at same time?
Find loads and add them up add 25% of continuous load. Balance load between conductors if 120/240.
This is everyday type of stuff from a design point of view, if you have a question on a particular part of the process then ask it.
Find loads and add them up add 25% of continuous load. Balance load between conductors if 120/240.
This is everyday type of stuff from a design point of view, if you have a question on a particular part of the process then ask it.
Welcome...
Might depend on who you are wanting to please, the inspector or the customer :grin:
As k-wired notes... a few variables left unanswered.,
If we assume the RV might actually need the full capacity, and you are able to distribute your loads on a 240/120 feeder so the pump is on the phase with the RV then you are looking at a 50 amp load per phase.
If you want to keep a 3% voltage drop, a #6 should suffice, but with that large a 120v motor I would be leery.
Might depend on who you are wanting to please, the inspector or the customer :grin:
As k-wired notes... a few variables left unanswered.,
If we assume the RV might actually need the full capacity, and you are able to distribute your loads on a 240/120 feeder so the pump is on the phase with the RV then you are looking at a 50 amp load per phase.
If you want to keep a 3% voltage drop, a #6 should suffice, but with that large a 120v motor I would be leery.
grounditplease
Member
- Location
- Florida panhandle
Yeah,I failed to mention 120/240......And the RV and 3 horse motor have me leary:}.....This owner has been JACK-LEGGING his own power for a while and acts like he's wanting to finally get it right out in that shed...with all the known loads I was wondering if I would be OVERDOING it with an 80 or 90 amp circuit???
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
A 120V single 3 hp motor draws 34 amps according to T430.248. Are you sure that is correct . I assume the RV is 120V-- seems like you need a #6 as Gus mentioned but with all those motors I would tend to go to a #4 at least.
If you phase stuff out properly you are looking at 42 amps but our calculated load may be closer to 60 amps. #6 is adaquate for 60 amps at 100' but I still think a #4 may be worth it.
If you phase stuff out properly you are looking at 42 amps but our calculated load may be closer to 60 amps. #6 is adaquate for 60 amps at 100' but I still think a #4 may be worth it.
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