606.15 Electrical equipment.
FC § 606.15
Where refrigerants of Groups A2, A3, B2 and B3, as defined in the Mechanical Code, are used, refrigerating system machinery rooms shall conform to the Class I, Division 2 hazardous location classification requirements of the Electrical Code. Exception: Ammonia machinery rooms that are provided with ventilation in accordance with Chapter 11 of the Mechanical Code.













