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Doug's
Single-Dwelling
Residential Electrical Service Size
Calculator (Canada)
UPDATED TO 2012 CEC, Part 1

Instructions:
Enter home data into the 9 boxes in the "data" column.
As data are entered, the form calculates results in real time.

Important: Read the Terms of Use!

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row CEC rule info items data calc's. watts
01 note Select: m2 ft.2 Step 1. Basement Floor Area:    
02 8-110(c) Revised Basement Floor Area in m2 »
0 m2
  
03 8-110(a),(b) Select: m2 ft.2 Step 2. Add'l Floor Areas Combined:    
04   Conversion of row 3 value into m2 »
0 m2
  
05 8-110(a),(b),(c) Total Floor Area for Demand Calculation in m2 »
0 m2
  
06 8-200(1)(a)(i),(ii) Watts Assigned To Above Total Floor Area »
0 W
07 8-200(1)(a)(iii) Step 3. Space Heating Loads: W    
08 62-116(1),(2) Space Heat Watts Revised »
0 W
  
09 8-200(1)(a)(iii) Step 4. Air-Conditioning Loads: W    
10 8-106(4) Step 5. Check box if space heat and air-conditioning can be on simultaneously =>    
11   Watts Assigned To Space Heat and AC Loads »
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: With Rating Greater Than 1500 Watts: W    
17 8-200(1)(a)(vii) Watts Assigned To Additional Loads »
0 W
18   TOTAL DEMAND WATTS »
0 W
19   TOTAL DEMAND AMPS »
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 10-812 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):

Calculations are based on the Canadian Electrical Code, Part I - 2012, 22nd Edition.

Assumptions for Calculations

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TERMS OF USE / DISCLAIMER:
Douglas Helmer provides the calculator on this page for the convenience of licensed and qualified electricians only. Douglas Helmer gives no warranty, express or implied, as to the accuracy, reliability and completeness of any information, formulae or calculations provided through the use of the calculators and does not accept any liability for loss or damage of whatsoever nature, which may be attributable to the reliance on and use of the calculator.

Use only qualified and licensed electricians to inspect or perform work on your residential service. Your home's electrical service is not a place for do-it-yourself'ers! EVER!

Copyright © 2008 - 2016 Douglas Helmer. All Rights Reserved.

The Canadian Electrical Code rules are copyright Canadian Standards Association.

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