Neutral heating from in-phase triplen currents calculator

Resistive neutral-conductor heating is calculated as (3 × I3)² × R_N. Use the stated system boundary and matching input units.

P_{N} = 9 \times I_{3}^{2} \times R_{N}

Calculator

Enter the values you know and leave one box empty. Calculate finds the empty one, the result or any input.

Given

P_{N} = 9 \times {15}^{2} \times 0.1 = 202.5

Symbol	Meaning	Unit
$P_{N}$	resistive neutral-conductor heating	W
$I_{3}$	third-harmonic rms current within each phase	A
$R_{N}$	neutral conductor resistance	ohm

Results are estimates for study and screening. Check the inputs, units and assumptions before you use them for design, billing or contract decisions.