03 Low voltage power

Voltage drop calculator

Size cable for low voltage LED strip, pixel and DC power runs. Length is the one-way distance to the load. The calculation allows for the full outgoing and return path.

DC Copper Live result
Circuit
Cable

Resistivity corrected for temperature. Copper 0.01724, aluminium 0.02826 Ω·mm²/m at 20 °C.

Result
5.02
%
Drop — per cent
11.40
V
Volts at load
Within 5 % allowance
Drop against allowance 5.02 / 5 %
0 % 10 %

Estimates are for scoping only and assume a single DC circuit with the load at the far end. Distributed loads, power injection points, fixture inrush and derating for grouping or ambient temperature all change the result. We design and commission the full power and data path — bring us your brief.

Questions?