For flexible metal conduit used in a Class I, Division 2 location, what must it comply with to serve as an effective path for ground-fault current?

In a Class I, Division 2 location, flexible metal conduit must comply with the NEC (National Electrical Code) requirements specified in 250.118(A)(5) to ensure it serves as an effective path for ground-fault current. This provision addresses the materials and methods used for grounding and supports safety by ensuring that the conduit can properly dissipate electrical faults.

The NEC outlines specific requirements about the wiring methods suitable for hazardous locations, which include the need for equipment and enclosures to protect against igniting explosive atmospheres. By adhering to these regulations, flexible metal conduit not only provides physical protection to conductors but also ensures that any fault current can effectively flow back to ground, minimizing the risk of electrical shock or fire.

The importance of compliance with the NEC is paramount in such hazardous environments. Local building codes may vary, but they must align with or exceed NEC standards. Relying solely on local codes or manufacturer specifications without considering NEC compliance could lead to unsafe installations that do not adequately account for the risks present in Class I, Division 2 locations. Therefore, adherence to NEC standards is essential for ensuring the safety and reliability of electrical systems in these settings.