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Voltage drop calculator
Single or three-phase, mV/A·m method, checked against the 5% limit.
Voltage drop
- Voltage drop
- 10.62 V
- As a percentage
- 4.62% of 230 V
- Against the 5% available
- Within limit
Method
- Vd = mV/A·m × I × L ÷ 1000
- = 17.7 × 20 A × 30 m ÷ 1000 = 10.62 V
- Available = 5% total − 0% used upstream = 5%
Reference
- AS/NZS 3000 clause 3.6 (voltage drop, 5% limit)
- AS/NZS 3008.1.1 mV/A·m tables (Cu, V-90)
Notes
- Indicative values. Verify against AS/NZS 3008.1.1 for the actual installation.
Verify against the current standard before relying on this.
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