Feeder Load Calculator
Use this feeder load workflow for transparent VA and current arithmetic when connected load, demand factor, continuous load, voltage, and phase are already known.
- Connected load
- VA
- Demand load
- VA
- Continuous adder
- VA
- Adjusted feeder load
- VA
- Feeder current
- A
Calculation details
- Phase multiplier
- x
- Calculation basis
- Selection boundary
Recent results
Formulas
- Demand load VA = connected load VA x demand factor percent / 100
- Continuous adder VA = continuous load VA x (continuous multiplier percent / 100 - 1)
- Adjusted feeder VA = demand load VA + continuous adder VA
- Feeder current = adjusted feeder VA / (phase multiplier x voltage)
Use this calculator
Estimate demand VA, continuous adder VA, adjusted feeder VA, and feeder current from user-entered connected load and factors.
Read the result
Review the calculated values with their displayed units and assumptions. The result is a planning aid for the stated inputs, not a final equipment or installation decision.
Check before final work
This feeder load estimate uses user-entered load and factor assumptions. It does not apply NEC demand tables, select conductors, select breakers, or prove code compliance.
FAQs
Does this apply feeder demand tables?
No. You enter the demand factor. This page only performs transparent VA and current arithmetic.
Why is the continuous load an adder?
The connected load is already included in the demand load. This calculator adds only the extra portion above 100 percent for the entered continuous-load multiplier.
Can this size feeder conductors?
No. Conductor and protection sizing require separate code, equipment, and local authority review.