Commercial Electrical Load Calculator

Offices, retail, restaurants, industrial & similar occupancies — service and feeder sizing per Rule 8-210

BC Electrical Code — CSA C22.1:24 (2024 CEC, 26th Ed.), adopted in BC March 4, 2025

1 · Basic Load — Lighting & Receptacles (Table 14 / Rule 8-210(a))

Enter each occupancy area. The W/m² and demand factor must come from Table 14 of your code copy — the presets below are common reference values only and default to a 100% demand factor (conservative). Always verify against Table 14.

2 · Special Loads (Rule 8-210(b))

Heating & Air Conditioning

Electric space heating — connected (W)

Heating demand factor % (Section 62)

62-118 permits reduced factors for some systems — verify.

Air conditioning (W) @100%

Heating & A/C interlocked — count only the greater (8-106(3))

Treat heating/AC as continuous (62-116)

Motors (8-106(1))

Total motor loads (W)

Largest motor (W)

25% of the largest motor is added per 8-106(1).

Treat motors as continuous

Other Equipment

Kitchen / cooking equipment (W)

Kitchen demand factor %

Show window / sign / stage lighting (W)

Continuous @100%.

Water heating (W)

Other loads (W)

Other loads demand factor %

Water heating continuous (e.g., tankless)

Other loads continuous

EV Charging (EVSE)

Number of chargers

Rating each (W)

e.g. Level 2, 32 A @ 240 V = 7680 W

EVSE demand treatment

3 · Service Characteristics

Service voltage / phase

Continuous load factor (Rule 8-104)

Design spare capacity % (optional)

Not a code requirement — future growth allowance.

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1 · Basic Load — Lighting & Receptacles (Table 14 / Rule 8-210(a))

2 · Special Loads (Rule 8-210(b))

Heating & Air Conditioning

Motors (8-106(1))

Other Equipment

EV Charging (EVSE)

3 · Service Characteristics

Results