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N.J.A.C. 12:90. BOILERS, PRESSURE VESSELS AND REFRIGERATION
12:90-3.3 Equipment requiring a licensed operator
(a) Any person operating the equipment listed below shall have the appropriate license as specified in N.J.A.C. 12:90-3.4 through 3.8.
Any steam boiler, steam generator, hot water boiler for service over 250 degrees Fahrenheit, or similar equipment potentially capable of generating steam having a safety valve or valves set higher than 15 pounds per square inch gauge and rated over six horsepower; A steam or hot water heating plant with an indicated or rated capacity that exceeds either 499 square feet of heating surface or 100 boiler horsepower or 1,000 kilowatts or 4,000,000 BTU input regardless of pressure or temperature conditions, and only when the building or building being served is deemed occupied; Any steam turbine, steam engine or other prime mover, rated over six horsepower; Any refrigerating plant using a refrigerant which is flammable, highly toxic or toxic and rated over 24 tons of refrigerating capacity; Any hoisting machine with a boom length exceeding 99 feet; or
Hot-oil generators or equipment using fluids other than water to produce steam indirectly.