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Commercial Load Estimating

Commercial Load Estimating. Richard Gaido, P.E. Types of Loads. Big Box Stores Grocery Stores Restaurants Schools Office Buildings Residential High Rises Hotels Data Centers Large Industrial Hospitals/Clinics Assisted Living/ Nursing Homes. Methodology of Diversification.

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Commercial Load Estimating

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  1. Commercial Load Estimating Richard Gaido, P.E.

  2. Types of Loads Big Box Stores Grocery Stores Restaurants Schools Office Buildings Residential High Rises Hotels Data Centers Large Industrial Hospitals/Clinics Assisted Living/ Nursing Homes

  3. Methodology of Diversification Historic Load Square Footage NEC Load Analysis

  4. Historic Load Know Your Customer • Check historical loads of similar projects. • Compare like for like projects. • Newer Wal-Marts/Targets, within the last 8-10 years, have a grocery component (refrigeration). • Verify if the footprint of the buildings are similar. • Inquire if there is something special about this project’s service that maybe different from a “normal” load usually seen. • Office Building - Data Center or Call Center proposed? • Grocery Store – Is there an increased amount of refrigeration planned? • Manufacturing – Is the process automated?

  5. Historic Load Know Your Customer continued • Ask the customer for an address for a similar service built and operational within the last 12-18 months to have a comparison. • Characteristics of loads to consider when sizing your services can be dependent on a couple of deciding factors for instance: • Schools- High demand for 8 hours out of the day then drop significantly, allowing the transformers time to cool. • Hospitals- Consistently high demand throughout the day, thus leaving little time for the transformers to cool. • Industrial – Are they running normal 8 hour days or 24/7? • Industrial Testing Facilities – What is the largest load that they will be testing? How long? How often?

  6. Square Footage • Big Box Stores sample size of 103,000SF-133,000SF • Average SF: 115,758SF • Average kVA: 677kVA • Average VA/SF: 4.9 VA/SF • Hotels sample size of 13,00,000SF-46,000SF • Average SF: 26,469SF • Average kVA: 263kVA • Average VA/SF: 5.7 VA/SF • Schools sample size of 165,000SF-280,000SF • Average SF: 248,817SF • Average kVA: 2145kVA • Average VA/SF: 6.4 VA/SF • Data Centers sample size of 21,000SF-47,000SF • Average SF: 54,942SF • Average kVA: 1446kVA • Average VA/SF: 22.3 VA/SF

  7. NEC Load Analysis • Grocery Stores Diversification Percentages • Air Conditioning 60%-70% • Refrigeration 75%-80% • Lighting 45%-65% • Receptacles 40%-60% • Water Heaters 20%-40% • Hand Dryers 5%-10% • Miscellaneous Motors 10%-30% • Restaurants Diversification Percentages • Air Conditioning 60%-70% • Refrigeration 40%-60% • Lighting 40%- 50% • Receptacles 20%-50% • Water Heaters 30%-50% • Hand Dryers 5%-10% • Residential/Office High Rises Diversification Percentages • Air Conditioning 60%-70% • Lighting 40%-70% • Receptacles 30%-80% • Water Heaters 20%-35% • Elevators 5%-10% • Garage Lighting/Elevators 10%-30% • Assisted Living Facilities Diversification Percentages • Air Conditioning 60%-70% • Lighting 30%-50% • Receptacles 20%-50% • Water Heaters 20%-30% • Elevators 5%-10% • Percentages used by line item on NEC Load Analysis provided by customer.

  8. Q&A

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