#100 amp sub panel aluminum wire size how to#
#100 amp sub panel aluminum wire size install#

If you should install too small wires to safely handle the load on large lines that, for example, carry 100 amps, they will routinely overheat and may start a fire. Safety is paramount and takes the front seat when doing any electrical work on your home. It is essential to understand the wiring technique and the required wire gauge to wire a 100 amp service panel successfully. You will even save money since operating an electrical service panel is crucial to every electrical repair, from replacing an outlet to wiring an entire room for remodeling. Thus, the owner is responsible for all the electric service panel issues.Īs a homeowner, understanding the basics of your home’s electrical service panel will keep you safe and your home well-lit and energized. The building owner owns the electric service panel in single-family residences, not the electric company. Assortment of wires that run from the circuit breakers to the circuits that service areas of the house.Open or shut spaces for extra circuit breakers (optional).Two cables that receive power coming in from the outside.Protective cover giving access to the technical part of the panel.A swinging hinged door providing access to the switches.The older fuses pull in and out instead of the rocker-style installing and removing circuit breakers.Īn electrical service panel composes of the following Note that a circuit breaker panel is not the same as a fuse box because it has mechanical, toggle-switch individual circuit breakers, not fuses, but it does perform the same function just in a safer manner. Therefore, a service panel is the distribution point that connects the incoming main service wires (service drop) to the exit wires(branch wire circuits), which branch off to distribute electricity to different parts of the house.

A subpanel is not bonded but has two hot wires, one neutral wire, and a bare copper wire for grounding. It is always good to know that the main service panel has the main disconnect.Īlso, the main service panel is bonded. Often, you will find a single circuit breaker at the meter, which is the main breaker (service disconnect), and one or more remote distribution subpanels inside the house.ĭepending on the electrical panel installation, you may find the main service panel and disconnect circuit breaker either on the top or bottom, depending on whether the service wire feeds from overhead or underground. Today, most builders install the main disconnect outside (the main panel) and the distribution panel ( subpanel) inside the house or garage. In older homes, you may find the main service disconnect and the breaker together.

The Distribution Panel is the circuit breaker panel with the entire circuit load that may be inside, possibly in the garage.

The Main Panel, which is the main disconnect breaker, 100 amps in this case is the Service Panel.

When we talk of an electrical service panel, two things come up

#100 amp sub panel aluminum wire size how to#

Video can’t be loaded because JavaScript is disabled: How to Install and Wire a Sub Panel () Service Panel He will also need to strip off the ends of the necessary wires to facilitate a proper and secured connection before connecting the cables to the subpanel terminals and the main breaker, ensuring the connection is complete. His job is to configure the route the cables will take toward the breaker sub-panel. An electrician can accomplish this by adding 2-pole individual breakers or tandem breakers to allow two circuits to share a single 110v breaker slot safely. If there is none available, the electrician could pigtail the branch circuit wires and breakers to provide the extra space. To add a breaker sub panel to a service panel, the electrician should install the 100 amp main breaker across two breaker slots. Aluminum is often used for service entry wires because it’s much cheaper than copper, lightweight, and easy to work with despite copper being a better conductor. Wire sizes are identified in American Wire Guage (AWG) and contain copper or aluminum wires in a wide array of thicknesses.Ī 100 amp subpanel installation requires #4 AWG copper wire or an equivalent of #2 AWG aluminum wires. Conclusion Installing A 100 Amp Service PanelĪ 100 amp circuit breaker is enough to power a condo or, to be more precise, a two-bedroomed apartment.įor larger homes with a 200 amp breaker box or higher that need more voltage, you can add a 100 amp subpanel.