If a service has 240v measured at the main disconnect could the 5% voltage drop be applied just to the feeder conductors rather than the overall combined length of feeder and branch circuit? Trying to get a 100-150a service to a detached shop 400'ish away with direct burial aluminum
215.2 (FPN) Voltage drop allowance for detached bldg 400' away
- Thread starter bzzt
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FPNs aren't code. You can have whatever voltage drop you want. Some items aren't happy with voltage drop, others are. 400 feet is a rather long way. I'd upsize. Don't forget the note in 250.122 in regards to upsizing the equipment ground when upsizing the ungrounded's for voltage drop.
- Location
- Illinois
- Occupation
- retired electrician
You need to come up with the actual load, and not the rating of the feeder to work out the voltage drop.
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