1. Identify the general lighting load using Article 220.42 and 220.52, applying demand factors based on square footage.
2. Calculate the load for small appliance circuits and laundry circuits per Article 220.52(B), then apply the appropriate demand factor from Table 220.42.
3. List all fixed electric space heating loads per Article 220.51, selecting the largest load if multiple types exist, and sum them without applying a demand factor.
4. Determine the load for each specific appliance (e.g., water heater, dishwasher, disposal) per Article 220.53, applying a 75% demand factor to the total of these loads.
5. Calculate the cooking equipment load per Article 220.55, using Table 220.55 based on the number of appliances and their ratings.
6. Sum all calculated loads (general lighting, small appliance, laundry, space heating, specific appliances, cooking) to determine the total connected load.
7. Apply the final demand factor from Table 220.42 or other applicable tables to the total connected load to find the service demand load.
8. Use the service demand load to size the main service conductors and overcurrent protection according to NEC requirements.
Parent Tip: Review the logic above to help your child master the concept of commercial electrical load calculations worksheet.
