BX is commonly used in residential, commercial, and industrial applications where wiring may be exposed to which of the following?

BX is commonly used in residential, commercial, and industrial applications where wiring may be exposed to which of the following?

• A. Water exposure
• B. Electrical noise
• C. Mechanical damage
• D. Heat buildup

Answer: (C)

Armored cable like BX is chosen where wiring could be physically hit or scraped. The steel armor surrounding the conductors provides a tough outer layer that resists impact, cuts, and abrasion, keeping the wires inside safe in spaces where they might be bumped by movement, stored materials, or objects. This is why BX is common in residential, commercial, and industrial settings where cables can be exposed to potential mechanical damage. Water exposure isn’t the primary purpose of the armor, and shielding for electrical noise isn’t its main function either; heat buildup isn’t controlled by the armor and is more about conductor sizing and ventilation. So the armor’s protective role against physical damage is the best reason BX is used in exposed wiring scenarios.

Armored cable like BX is chosen where wiring could be physically hit or scraped. The steel armor surrounding the conductors provides a tough outer layer that resists impact, cuts, and abrasion, keeping the wires inside safe in spaces where they might be bumped by movement, stored materials, or objects. This is why BX is common in residential, commercial, and industrial settings where cables can be exposed to potential mechanical damage. Water exposure isn’t the primary purpose of the armor, and shielding for electrical noise isn’t its main function either; heat buildup isn’t controlled by the armor and is more about conductor sizing and ventilation. So the armor’s protective role against physical damage is the best reason BX is used in exposed wiring scenarios.