#Cost to install 100 amp sub panel upgrade

If you have the option, you should upgrade to 125, 150, or even 200 amps.

You are more likely to find this capacity in older and smaller, the kind that don’t rely on high-end heavy-duty kitchen and laundry appliances, not to mention powerful air conditioners.ġ00A services are medium-capacity. It gives consumers enough electricity to run all the essential items. This is the minimum amp capacity the NEC expects to see. If you live in a contemporary house of 1,200 feet or more, 100-amp panels are the starting point. But 30 and 60A services are far too small to serve the needs of a modern home. By the 1960s, many places had jumped to 60-amp panels. For instance, you had houses in the first half of the 20 th Century with 30-amp panels. The size matters because it affects the devices you can run on that electrical service.Įlectrical services were so much smaller in the past. You have to select the electrical service carefully. If you check the panel, it will tell you the total capacity of the electrical service. But if two bus bars connect to a branch circuit, it can access 240 volts. If the branch circuit connects to one bus bar, you will get 120 volts of power. You can determine the voltage of each branch circuit by looking at the number of bus bars to which it is connected. The panel has a pair of bus bars that provide 120V each. The panel distributes the electricity from the wires to the other branch circuits. Regardless of where they pass, these wires will eventually stop at the service panel. Most homes have two 120V service wires that will either pass overhead or underground.

Simply put, power reaches your home via the service panel. The Spruce gave a basic explanation of the workings of a home’s electrical service. It can affect the number and size of the equipment you can run in your home. The amperage of the electrical service is not random. It shows you the volume of electricity that can flow through your home. Your home’s electrical service size reveals the total capacity available to you. 125A is the total volume of electricity the bus bars can safely carry. If you see 125 amps in the panel, your electrical service has a capacity of 125 amps. But what do those terms mean? If your panel shows that you have 125-amp service, is that good or bad? Should you upgrade the amp service or leave it alone? This guide will give you an idea of what your amp service means and what you should do about it. You have probably heard your electrician refer to the amps of your electrical service.