For a standard three-phase supply (400V), the maximum drop is . Installations Supplied by Stand-Alone Systems
| Type of Installation | Maximum Voltage Drop | | --- | --- | | Residential and Commercial | 5% | | Industrial | 3% | | Rural and Remote | 6% |
Apply the formula and compare the result against the 5% (or 11.5V/20V) threshold. max voltage drop australia
AS/NZS 3000 considers the from the supply point to the final equipment.
( V_drop = \frac\sqrt3 \times L \times I \times R_c1000 ) For a standard three-phase supply (400V), the maximum
For a standard Australian supply voltage of 230 volts AC, these limits translate to:
The primary standard governing electrical installations in Australia is , commonly known as the Wiring Rules . ( V_drop = \frac\sqrt3 \times L \times I
( V_drop = \frac2 \times L \times I \times R_c1000 ) (where ( R_c ) = cable resistance in Ω/km from AS/NZS 3008.1.1)