Q: Will it be cheaper to have a 150 amp service installed instead of a 200 amp service?Ī: First off, a 150amp is an odd size and not common at all. For really large homes with multiple central air conditioning systems a 400 amp service may be needed. This will cover all the usual electric appliances with central air and EV charging. For most customers in single family homes a 200 amp service is the largest size needed. Once every current and future electric load is added up, we come up with a total load and base the electrical service on that number. This makes sense, right? When is the last time you had every light on in your home, used every outlet, with your microwave on, your dishwasher running, washer / dryer running, fridge running, garage doors opening, every burner on your electric range on etc. Our electrical code assumes that all appliances / receptacles / lights will NEVER be used at the same time. These numbers are added up and some demand factors are applied. This takes into account the square footage of the home plus the electric appliances. Electricians calculate the needed service size using what is called a load calculation. Q: How do I know what size electrical service I need for my single family home?Ī: It really depends on what electrical loads you plan to add to your home. If you have any questions not listed here, please email them to use today and we’ll add them in. Please take a look at the common questions we get from customers during estimate appointments.
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