Method — Screening-level estimate
Demand is a rule-of-thumb W/m2 figure with a declared diversity factor. This is NOT a short-circuit, protection, earthing or cable-sizing 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
P_connected = A x w Where:
-
A= Total floor area [m2] -
w= Connected load density [W/m2]
Derived Equations:
Connected load in kW:
P_kW = P_connected / 1000 Maximum demand after diversity:
S_kVA = P_kW x (diversity / 100) Distribution boards, two per floor:
DB = 2 x floors Circuits per dwelling:
MCB = 3 x units Assumptions & Limitations
- No circuit diversity by load class, no motor starting currents, no neutral-harmonic study.
- Cable sizes are not derived - no ampacity, voltage drop or grouping-factor calculation.
- Not suitable for transformer selection or protection coordination.