“A metal-clad cable (MC cable) is a type of electrical cable used for wiring buildings and structures. It is designed to provide both electrical conductivity and protection against physical damage, making it suitable for various applications, including residential, commercial, and industrial settings.
The construction of a metal-clad cable typically consists of the following components:
Conductors: These are the wires that carry electrical current. MC cables can have multiple insulated conductors, usually made of copper or aluminium, depending on the intended use and the electrical requirements.
Insulation: Each individual conductor is insulated with a layer of material, such as thermoplastic or thermosetting plastic, to prevent electrical leakage and short circuits.
Metal Sheath: The distinguishing feature of metal-clad cables is the outer metal sheath that encases the insulated conductors. This sheath is usually made of aluminium or steel and serves two primary purposes:
Mechanical Protection: The metal sheath provides a layer of protection against physical damage, such as impact, bending, and crushing. This is particularly important when the cable is installed in areas with higher risk of damage, like exposed areas or areas with foot traffic.
Grounding: The metal sheath also acts as a grounding conductor, providing a pathway for fault currents to dissipate safely and helping to ensure electrical safety.
MC cables come in various configurations, including different conductor sizes, numbers of conductors, and insulation types, to accommodate different electrical needs and building codes. They are commonly used for wiring applications where the added protection of a metal sheath is desired, but where the flexibility and ease of installation of traditional conduit systems may not be necessary.
It’s important to note that building codes and regulations can vary by location, so it’s advisable to consult with a qualified electrician or local authorities before choosing and installing any type of electrical wiring.”