Electrical design for buildings and facilities: HVAC circuits to NEC 440, lighting by the lumen method, elevator demand and energy, data-center PUE, life-cycle cost, heat tracing and enclosure cooling.
Motor-compressor branch-circuit sizing (NEC Art. 440) or IEC general method. Multi-motor combination loads and VFD-fed motors are advanced features.
Lumen method (EN 12464-1 or IES Handbook) for interior rooms. Exterior/area lighting and EN 1838 emergency lighting checks are advanced features.
Traction elevator motor power from load/speed/balance/efficiency, plus NEC Table 620.14 feeder demand factor for a group of elevators.
Estimates a traction elevator's annual electrical energy use (kWh/year) from running power, duty cycle, regenerative-drive credit and standby power — structured after ISO 25745-2.
Power Usage Effectiveness (PUE) & DCiE from facility/IT energy, overhead cost, and a Green Grid efficiency-band classification.
Discounted-cash-flow life-cycle cost comparison of two options (e.g. standard vs. premium efficiency) with present worth, equivalent annual cost and simple payback.
Electrical trace-heating power from pipe insulation heat loss, heater cable selection, and circuit voltage-drop/breaker sizing.
Natural-convection heat-dissipation check for panel/MCC enclosures, with IEC 60890-derived forced-air fan sizing if needed.
Why this category's calculators often need a non-electrical answer — heat transfer, photometry, mechanics, or economics — before the electrical sizing question can even be asked.