The answer to 'difference between electrical wiring' is that there are two main types of electrical wiring used in homes: nonmetallic cable (also known as Romex) and armored cable (also known as BX or metal-clad cable). Nonmetallic cable is the most common type of residential wiring, with flexible plastic or PVC insulation surrounding the copper conductors. Armored cable has a metal sheath around the conductors, providing additional protection and grounding. The choice between the two depends on factors like the age of the home, local building codes, and the specific wiring needs of the project.
Nonmetallic cable is generally less expensive and easier to install, making it a popular choice for new construction and renovations. Armored cable is more durable and fire-resistant, and is often required in certain applications like kitchens, bathrooms, and basements. Both types of wiring must be installed by a licensed electrician to ensure safety and compliance with electrical codes.