Voltage Drop

Resistance method on the NEC Chapter 9 Table 8 basis. Nothing you enter leaves your browser.

Inputs

What do you need?

Drop for a run Size for a target Max length for a size

System

Voltage (V)

Load current (A)

Conductor

Size

Parallel sets per phase

One-way length

Conductor temperature

Use the conductor's operating temperature; 75 °C matches the table and most terminations.