What Are Residential Wiring Systems?
Modern homes typically have non-metallic cable, consisting of two or more individual wires wrapped in the plastic sheathing. Separate lines are generally comprised of hot, neutral, and ground wire. Wires can also be installed inside flexible plastic tubing or rigid metal tubing. In the case of exposed wiring, this type of cable is commonly known as a conduit. Read on to learn more about residential wiring systems.

NM cable
According to electrical inspections Philadelphia pa, choosing an NM cable wire type for residential wiring systems is recommended.This cable type is lightweight and relatively cheap compared to metal conduit and armored cables. It is also less prone to rips and snags than wires encased in the metallic sheathing. However, this type of wire cannot be used outdoors or above drop ceilings, so a conduit must be used.
NM cables come in white, yellow, and orange sheathing. The wires inside these cables are 14 to 12 gauge. Therefore, NM cable is not a good choice for circuits that are over 60 amps. NM cable comes in two different types: Type USE and Service Entrance. The former is used in residential wiring systems, while the latter is used for high-end appliances. This type of cable is also straightforward to install.
Non-metallic cable
Residential electrical circuits are typically made of copper wires that must be tightly bundled to avoid contact. Running individual copper wires would be logistically impossible. Thus, different methods have been developed for separating the wires. One of the most common … Read more
