Electrical Service Load Calculator for Single Dwellings in Canada

Will I Need Black Box Energy Management When Adding a Load?

To ensure accuracy refresh the page before starting each calculation

Select m2 ft.and enter the information for both the basement and floors above ground replacing the 0 in the Data column.
Enter the rest of the home information under the Data column indicated in bold type replacing the 0 value.
The calculation will show a running tally of watts on the two right columns under Calculation and Watts and also at the bottom. Do not leave any fields blank. Enter 0 for no value.

This calculator does not replace Electrical Code Calculations and is for estimation only. Some parts of this calculator are taken from CEC 2021.

Row CEC Rule Items Data Calculation Watts
01 note

Step 1. Basement Floor Area:

Select: m2 ft.2

02 8-110(c) Basement Floor Area in meters2 
0 m2
03 8-110(a),(b)

Step 2. All Floor Areas Above The Basement:

Select: m2 ft.2

04   Floor Area above the basement in meters2 
0 m2
05 8-110(a),(b),(c) Total Floor Area in meters2 
0 m2
06 8-200(1)(a)(i),(ii) Watts Assigned To Total Floor Area 
0 W
07 8-200(1)(a)(iii) Step 3. Combined Space Heating Loads: W    
08 62-118(1),(2) Total Watts Assigned to Space Heat 
0 W
09 8-200(1)(a)(iii) Step 4. Air-Conditioning Rating: W    
10 8-106(3) Step 5. Check box if space heat and air-conditioning can be on simultaneously =>    
11   Total Watts Assigned To Space Heat and AC 
0 W
12   Step 6. Electric Range: W    
13 8-200(1)(a)(iv) Watts Assigned To Electric Range 
0 W
14 8-200(1)(a)(v) Step 7. Water Heaters: Tankless Water Heaters; Water Steamers; Pool, Tub & Spa Water Heaters: W  
0 W
15 8-200(1)(a)(vi) Step 8. Electric Vehicle Charging Equipment Loads: W  
0 W
16 8-200(1)(a)(vii) Step 9. Additional Loads: Include any with Rating Greater Than 1500 Watts for example an Electric Dryer: W    
17 8-200(1)(a)(vii) Watts Assigned To Additional Loads 
0 W
0 W
0 A
20 8-200 Minimum Service Amps:
21 Table 2 or 4 Hot Conductor Size:
22   Meter Base Rating:
23 Table 13 Main Fuse / Breaker:
24 Section 10 Service Grounding Conductor:
25 Table 41 Service Bonding Jumper:
26 Table 6 Service Conduit Size (threaded, rigid metal):
27 8-108 Service Panel Size (minimum):