Voltage drop for a remote SEB

[Grouch1980]

Hi all,
I am working on a project where we have to locate the Service End Box about 25 feet away from the Service Switchboard. Is there anything in the NEC or energy codes that dictates the max voltage drop allowed between the service end box and the switchboard? I know the energy code wants a max of 2% for feeders, plus 3% for branch circuits. But how do I take into account the voltage drop between the SEB and the switchboard when the SEB is in a remote location (in this case, 25 feet away)?

Thanks.

 

[ActionDave]

I don't know what a service end box is but whatever it is 25 feet more wire shouldn't matter much for a voltage drop calc. There are no NEC requirements for voltage drop in this case.

 

[Grouch1980]

I don't know what a service end box is but whatever it is 25 feet more wire shouldn't matter much for a voltage drop calc. There are no NEC requirements for voltage drop in this case.

It's the pull box where the utility feeder comes into the building... on the line side is the utility feeder, and on the load side of the pull box is the building wiring. I think 'service end box' is a con edison term (this is in New York). so my question is regarding the wiring between this pull box and the CT cabinet in the switchboard. What you're saying though makes sense.. if it's only 25 feet, then it probably shouldn't matter... but this is the feeder for the entire building.. so the amps will be in the thousands... in which case there would be voltage drop. i'd have to run the calculations and see what percentage drop i get, if any.

 

[GoldDigger]

...
... What you're saying though makes sense.. if it's only 25 feet, then it probably shouldn't matter... but this is the feeder for the entire building.. so the amps will be in the thousands... in which case there would be voltage drop. i'd have to run the calculations and see what percentage drop i get, if any.

If the amps will be in the thousands, the wire will be correspondingly sized in the first place, so the comment about 25' not causing a problematic voltage drop should scale across all service sizes.

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