⚡ CEC Demand Calculator

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Reference tool. Verify all calculations against the current edition of the Canadian Electrical Code and applicable provincial amendments.

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Breaker Panel

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Used
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Available
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Capacity
Calculation Type & Service
Basic Demand Load Rule 8-200(3)(a)
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Electric Range Rule 8-200(3)(b)
kW --
6,000 W base. If nameplate > 12 kW, add 40% of excess.
Space Heating & Air Conditioning Rule 8-200(3)(c)
kW --
kW --
Uses the LARGER of heating or A/C demand. Heating: first 10 kW at 100%, rest at 75%.
Electric Water Heater Rule 8-200(3)(d)
kW --
Electric Clothes Dryer Rule 8-200(3)(e)
kW --
25% of nameplate, minimum 5,000 W applied.
Lighting & Receptacle Load Rule 8-202 / Table 14
W/m²
--
First 10,000 W at 100%, next 25,000 W at 70%, remainder at 50%.
Space Heating & Air Conditioning Rule 8-202
kW --
kW --
Uses the LARGER of heating or A/C. Heating: first 10 kW at 100%, remainder at 75%. A/C at 100%.
Motor Loads Rule 8-202 / 28-106
A
kW --
Total motor load + 25% of largest motor FLA added.
Additional Equipment Breaker Schedule
EV charger, pool/hot tub, sauna, kitchen equipment, sign lighting, etc.
0 W
Calculated Demand & Service Size Residential
Load ComponentDemand (W)
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Minimum Service Required