Raceways, cable trays, and other wiring methods for intrinsically safe wiring shall be identified with permanently affixed labels no more than what distance apart?

Raceways, cable trays, and other wiring methods for intrinsically safe wiring shall be identified with permanently affixed labels no more than what distance apart?

• A. Both 12' and 3.7 m
• B. 25' or 7.5 m
• C. 12'
• D. 3.7 m

Answer: (B)

In intrinsically safe wiring, it’s essential to clearly identify the wiring method along raceways and cable trays so anyone working on the system can quickly verify the protection used. Labels must be permanently affixed and placed so that no point along the run is more than 25 feet (7.5 meters) from a label. This maximum spacing ensures continuous identification of the intrinsically safe method, reducing the chance of misinterpretation during maintenance or inspections. Shorter spacings, like 12 feet (3.7 m), would still meet the requirement, but the specified maximum distance is 25 feet (7.5 m).

In intrinsically safe wiring, it’s essential to clearly identify the wiring method along raceways and cable trays so anyone working on the system can quickly verify the protection used. Labels must be permanently affixed and placed so that no point along the run is more than 25 feet (7.5 meters) from a label. This maximum spacing ensures continuous identification of the intrinsically safe method, reducing the chance of misinterpretation during maintenance or inspections. Shorter spacings, like 12 feet (3.7 m), would still meet the requirement, but the specified maximum distance is 25 feet (7.5 m).