Lighting Load Calculator
AS/NZS 3000:2018 + AS 1680 (Australian conditions)
✓ Phase 2 Calculator
Inputs
80% of breaker rating recommended
Results
Total Load
360
Watts (1.57A)
1 circuit required
✅
Circuit Loading
✅
W/m² Guideline
✅
Breaker Rating
Total Watts360 W
Total Amps1.57 A
W/m²3.6 W/m²
Circuits Required1
Amps per Circuit1.57 A
Important: These results are indicative only. Lighting circuits must be designed and verified by a qualified electrical engineer in accordance with AS/NZS 3000:2018 and AS 1680 before final design.
Lighting Load Design Guide — AS/NZS 3000:2018 + AS 1680
Lighting circuit design requires careful calculation of luminaire loads, accounting for ballast losses and choosing the right circuit breaker rating. This calculator helps you determine the total wattage, amperage, number of circuits, and compliance with Australian wiring standards.
Luminaire Types & Ballast Factors
- LED: Factor 1.0 — modern LEDs have minimal losses, efficient drivers.
- Fluorescent: Factor 1.1 — magnetic ballast adds ~10% to nameplate wattage.
- Halogen: Factor 1.0 — resistive load, no ballast.
- HID (High Intensity Discharge): Factor 1.15 — ballast adds ~15% to lamp wattage.
- Other: Factor 1.1 — conservative estimate for unknown types.
Disclaimer: These results are indicative only. Lighting circuits must be designed and verified by a qualified electrical engineer in accordance with AS/NZS 3000:2018 and AS 1680 before final design. Emergency lighting requirements per AS 2293 must be assessed separately.