330' run 60 amps voltage drop

[Stevenfyeager]

The on line calculator I use says for 330', 60 amps, 1/0 Al single conductors in pvc (already installed by customer) will produce 3.2% voltage drop. I think 3 - 5 % is considered acceptable ?
I usually shoot for 3%. Do these numbers sound correct ? Thank you.

 

[electrofelon]

The on line calculator I use says for 330', 60 amps, 1/0 Al single conductors in pvc (already installed by customer) will produce 3.2% voltage drop. I think 3 - 5 % is considered acceptable ?
I usually shoot for 3%. Do these numbers sound correct ? Thank you.

Yes the numbers seem correct. Is it a 60 amp load or a 60 amp circuit?

 

[LarryFine]

Consider step-up/step/down transformers. The voltage drop at 480v or 600v is much less.

 

[curt swartz]

Consider step-up/step/down transformers. The voltage drop at 480v or 600v is much less.

For 330' it it more cost effective to increase the size of the conductor. The cost for transformers, additional materials and labor will eat up any savings from using smaller conductors. You also have the transformer losses.

In the OP's case the conductors are already installed. For a 60 amp feeder or even a 60 amp load I would not be worried about VD.
Utilities run hundreds of feed of overhead 1/0 AL bare feeding multiple 100 & 200 amp services on homes.

 

[tortuga]

FYI California I don't think they have changed title 24 energy code 130.5 (c) Voltage Drop since it came out in 2013.

Your allowed to have a maximum combined voltage drop on both installed feeder conductors and branch circuit conductors to the farthest connected load or outlet of 5% of the full load amps or running load amps.
I omit and continuous / largest motor factors from the calculated full load amps and keep any demand factors.
There is no independent branch / feeder rules, just 5% total.

 

[kwired]

Yes the numbers seem correct. Is it a 60 amp load or a 60 amp circuit?

This is kind of important. Just because one had 60 amp ocpd doesn't mean they have 60 amps of load.

Nothing wrong with considering future load either but if a rather fixed load on a 60 amp breaker all that really matters is what is actual load, along with acceptable amount of VD.

Efficiency wise the more usage the more important this might become, some cases it can depend on if it effects performance of whatever the load is.

If you are some place where AHJ's pay attention to energy codes it can be a big thing I would guess. Nobody enforces that aspect around here designer/installers may still take into consideration for performance reasons though or even how it might impact other loads on same service/feeder.