While understanding the code is an important first step when it comes to sizing, understanding how your customer plans to use the equipment is a close second.
When sizing for a residential or commercial application, you can start with the basics, such as square footage, appliance and HVAC system usage. But you can also go to the source — the electric company. With the home or business owner’s approval, you can gather information on their peak electrical demand, which can provide valuable insight into what their power needs are.
For example, if you’re sizing a commercial building by simply using a load calculation, you may be fooled. If the building was built for a tech company, but now an insurance company uses the space, it could be drawing power in a completely different way than how the building design originally intended. By pairing a load calculation with the demand factor, you can truly get to the heart of your customer’s power usage and needs.