Engineering calculator
Cable current & voltage drop
Inputs
Results
- Load current
- 386.45A
- Voltage drop
- 14.26V
- Voltage drop
- 3.44%
Compare with the limit applicable to the installation (AS/NZS 3000 allows 5% overall for LV unless otherwise specified).
ΔV = √3 × I × L × (R cos φ + X sin φ)
Safety-critical result — professional verification required
This is a screening estimate. It must not be used for design, equipment selection, protection settings or PPE without verification by a suitably qualified and competent engineer using a full study.
Assumptions
- Balanced three-phase load
- R and X from manufacturer data or AS/NZS 3008.1.1
Limitations
- Does not check current-carrying capacity, derating or fault withstand
- Motor starting drop not included
References: AS/NZS 3008.1.1 · AS/NZS 3000
Provided for general information. Gridlinks Solutions accepts no liability for decisions made using this calculator without independent engineering verification.
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