Maximum Voltage Drop
NEC standards allow for a maximum 3% voltage drop in feeder conductors, and a maximum 5% voltage drop in branch conductors. Some loads may require even more stringent % values. If in doubt, consult the manufacturer of your specific load.
Branch Conductor
Branch conductors are sized to carry 100% of load rated amperage per the NEC
minimal requirement for non-continuous use (defined by the NEC as having less than 3 hours of continuous use).
Feeder Conductor
All feeder conductors are sized slightly larger than the NEC minimal requirement for non-continuous use.
Feeder conductors are sized to carry a minimum of
125% of the largest single load amperage plus the total amperage of all
other individual loads that are connected with the feeder conductor.