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Voltage drop calculation

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Gary90

New User
Location
Canada
Occupation
License Electrician
When I do the voltage drop calculation to install an 3 pole 20 amp 120 volt branch circuit for fence lights 375 light 3500 feet from the electrical service the calculation tells me astronomical large wire size. Is this even possible or do I have to build a service closer to the Fence?
 
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Rick 0920

Senior Member
Location
Jacksonville, FL
Occupation
Electrical Instructor
You would be better off wiring your lights in series for that distance similar to how they do airport runway lights and tunnel lights. That would decrease your wire size.
 
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GoldDigger

Moderator
Staff member
Location
Placerville, CA, USA
Occupation
Retired PV System Designer
What is the power draw for each light?
If you cannot use a high voltage series circuit, a higher voltage branch with stepdown transformers for groups of low voltage lights may help.

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