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Romex wire12/29/2023 ![]() ![]() Conduit is typically used where the wiring will be exposed and not hidden inside walls, floors, or ceilings.Īlmost all of the wiring in outlets and light fixtures in a modern home is NM cable. One notable exception is ground wires, which are typically solid copper and are either insulated with green sheathing or uninsulated (bare).Īs an alternative to NM cable, individual wires can be installed inside of a rigid or flexible metal or plastic tubing called conduit. Most wires in a home are insulated, meaning they are wrapped in a nonconductive plastic coating. In the case of household wiring, the conductor itself is usually copper or aluminum (or copper-sheathed aluminum) and is either a solid metal conductor or stranded wire. An electrical wire is a type of conductor, which is a material that conducts electricity. ![]() It helps to understand a few basic terms used to describe wiring. ![]() Any new electrical installation requires new wiring that conforms to local building codes.īelow, learn the different types of home electrical wires to choose the right option for completing electrical projects accurately and safely. Wiring for modern homes is quite standard, and most homes built after the mid-1960s have similar types of wiring. On the other hand, when examining the old wiring in your home, identifying the wire type can tell you a lot about the circuit the wiring belongs to (for example, if you open a junction box and need to determine which wires go where). When you're installing new wiring, choosing the right wire or cable is half the battle.
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