100 amp service ground wire size how to#

In an overhead or aerial system, the utility company brings three cables, two hot and one neutral, from the pole-mounted street transformer to the Service Head at the roof of the house. The two common methods for bringing the service cables into the house are the Overhead Conduit System and Underground System. When we say the term “service”, we mean the wires and cables responsible for bringing electricity from the street transformer to the main circuit breaker panel in your home. If you are planning to install or set up 100 amp service panels or sub-panel wiring, then we highly recommend you consult with an experienced and licensed electrician. This is just a technical discussion on the 100 amp wire size you need for such installations.

100 amp service ground wire size how to#

WARNING: This is not a user guide on how to wire the 100 amp service entrance or sub-panel. If you are just starting construction on a new home or if you are planning to extend the existing electrical system with a sub-panel, then you need to know the 100 amp wire size (or wire size for appropriate service or feeder wire). After that, we will see what wire size is suitable for 100-amp service panel or sub-panel wiring. In this guide, let us discuss the importance of wire and conductor sizes in electrical systems. The next logical discussion is regarding the 100 Amp Wire and what AWG wire size should we use for the 100-amp service entrance.

So, it is often rated for at least 100 amps. While the circuits from the service panel are suitable for carrying 15 Amps or 20 Amps of current, the main service entrance must carry all the load in and out of the house. So, choosing a proper wire size as per the current it can carry is essential. Wire and cables are responsible for carrying the current in the circuit. If the service panel is the heart, then the wires and cables are the arteries and veins of the system. Using the service panel, we distribute the electricity all over the house by carefully designing the circuits. The main service panel or the circuit breaker panel is the heart of the residential electrical system.