What type of cable has an internal bonding strip of copper or aluminum in contact with armor for its entire length?

What type of cable has an internal bonding strip of copper or aluminum in contact with armor for its entire length?

• A. NMP
• B. MC
• C. AC
• D. UF

Answer: (C)

The correct answer is based on the characteristics of the specific cable types identified in the question. The type of cable that features an internal bonding strip of copper or aluminum that maintains contact with the armor for its entire length is the MC (Metallic Sheathed Cable).

MC cable is designed with an internal grounding and bonding system, which is essential for safety and compliance with electrical codes. This internal bonding strip serves to ground the cable's metallic armor effectively, providing a path for fault currents and enhancing the overall safety of the electrical installation. The continuous contact of the bonding strip with the armor helps to prevent any potential electromagnetic interference and ensures that the entire length of the cable remains properly grounded.

In contrast, other cable types such as AC (Armored Cable) do not feature the same internal bonding strip design across their entire length, which means they rely on different methods for grounding and bonding. NMP (Non-Metallic Sheathed Cable) and UF (Underground Feeder Cable) are primarily insulated and do not have metallic armor like MC or AC cables, making them different in design and application. Thus, the specific design feature of MC cable is what makes it the correct choice for the question asked.