Question on wire size for a loooooooong sub feed run???

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jango

jango

Senior Member
Feeding a 200A rated panel and let's just assume the 80% load capacity (160A). The run is +/-800 feet long. Two questions, what wire size is recommended and is there a requirement for the distance in between for access pull points (christy boxes)?
 
G

Gregg Harris

Senior Member
Location
Virginia
Occupation
Electrical,HVAC, Technical Trainer
jango said:
Feeding a 200A rated panel and let's just assume the 80% load capacity (160A). The run is +/-800 feet long. Two questions, what wire size is recommended and is there a requirement for the distance in between for access pull points (christy boxes)?
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voltage and phase?
 
C

Cow

Senior Member
Location
Eastern Oregon
Occupation
Electrician
jango said:
Two questions, what wire size is recommended and is there a requirement for the distance in between for access pull points (christy boxes)?
Click to expand...

There aren't any. We'd only add them if we had excessive 90's for a pull that long. If it was a straight shot or only two long sweep 90's we'd pull the whole way.

Can't answer your voltage drop question without voltage and phase like mentioned above.
 
augie47

augie47

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Staff member
Location
Tennessee
Occupation
State Electrical Inspector (Retired)
Use Mike Holts calculator (available at MH "Free Stuff") and came up with 750 AL for a little over 3% drop, 500 AL would give you closer to 5% drop.. choose your poison.
 
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