Method — Screening-level estimate
Catalogue selection from an already-computed maximum demand. NOT a protection, earthing or short-circuit study.
Every result below is produced by the same engineering engine that feeds the High-Rise reference project, so a quantity taken from this page and a quantity taken from the workflow cannot disagree.
Governing Formula
Governing Formula
S_required = S_max x (1 + allowance) Where:
-
S= Maximum demand [kVA]
Derived Equations:
Catalogue selection:
S_selected = next standard rating >= S_required Standby rating, rounded to 50 kVA:
S_gen = S_max x critical% General lighting count:
N_luminaire = A / m2 per luminaire Assumptions & Limitations
- No voltage-drop, fault-level or protection coordination; transformer impedance and vector group are not modelled.
- No non-diversity or partial-fixing loads added separately.
- Luminaire counts are spacing screening - no illuminance calculation, UGR or lighting-design layout.