Which statement is true about BX cable?

BX cable, which refers to flexible metal conduit (FMC), has specific characteristics concerning grounding. It is important to understand that this type of cable must always be grounded to ensure safety and compliance with electrical codes. Grounding provides a pathway for fault current to prevent electric shock or fire hazards.

In BX cable, the metal armor acts as an equipment grounding conductor. This means that not only does the cable need to be grounded, but the metal sheath itself can be utilized for grounding purposes. This dual functionality strengthens its grounding capacity while fulfilling code requirements.

Thus, both aspects in the correct answer highlight essential safety practices associated with BX cables. The grounding requirement protects individuals and electrical systems, while the use of the armor for grounding simplifies installation by reducing the need for a separate grounding conductor. Understanding this helps in ensuring that electrical installations comply with safety standards and regulations while implementing effective grounding methods.