D.C. Mun. Regs. tit. 17, r. 17-400

Current through Register Vol. 71, No. 49, December 6, 2024

Rule 17-400 - REQUIREMENTS FOR LICENSED OPERATORS

400.1

The operation and maintenance of the following equipment shall be exempt from the requirement of having licensed operating engineers:

(a) Vehicles operated under the regulations of the D.C. Public Service Commission or the U.S. Interstate Commerce Commission;

(b) Machinery on boats or vessels operated under the regulations of the United States Coast Guard;

(c) Automotive vehicles used solely for traction purposes;

(d) Packaged, self-contained air conditioning units;

(e) Automatically operated air conditioning systems with non-toxic and non-inflammable refrigerant and not over a total of one hundred twenty-five (125) compressor horsepower, where no one refrigerant circuit is in excess of seventy-five (75) horsepower;

(f) Automatically operated air conditioning systems using the heat absorption cycle with a non-toxic and non-inflammable refrigerant and not over a total of one hundred twenty-five (125) tons of refrigeration, where no one refrigerant circuit is in excess of seventy-five (75) tons, except where a boiler of a type and capacity that requires a licensed engineer is used;

(g) Cold storage and refrigeration systems using non-toxic and non-inflammable refrigerant not in excess of seventy-five (75) compressor horsepower;

(h) Cold storage and refrigeration systems using the heat absorption cycle with a non-toxic and non-inflammable refrigerant not in excess of forty (40) tons;

(i) Cold storage and refrigeration systems using toxic or inflammable refrigerant not in excess of five (5) compressor horsepower;

(j) Cold storage and refrigeration systems using the heat absorption cycle with a toxic or inflammable refrigerant not in excess of three (3) tons;

(k) Automatically operated pumping stations;

(l) Hot water heating boilers where the total boiler horsepower is not in excess of seventy-five (75) horsepower [sixteen thousand eight hundred square feet (16,800 ft.2) of water radiation at one hundred fifty degrees Fahrenheit (150º F.)];

(m) Air compressors having a capacity of less than one hundred ten cubic feet per minute (110 ft.3/min.) at one hundred pounds per square inch (100 lbs./in.2) pressure;

(n) Motor or engine driven electric generator sets used for welding or lighting not in excess of fifty kilovolt amperes (50 KVA); or

(o) Low pressure steam boilers having gravity or trap returns.

400.2

The operation and maintenance of the following equipment shall be by or under the daily supervision of a steam or other operating engineer who is duly licensed in the proper class by the Board of Examiners for Steam and Other Operating Engineers in the District of Columbia:

(a) Boilers and boiler auxiliaries;

(b) Steam engines;

(c) Refrigeration equipment with non-toxic and non-inflammable refrigerant driven by electric motors in excess of twenty-five (25) horsepower;

(d) Refrigeration systems using the heat absorption cycle with non-toxic and non-inflammable refrigerant;

(e) Refrigeration systems of five (5) or more compressor horsepower using a toxic or inflammable refrigerant;

(f) Refrigeration systems of three (3) or more tons using the heat absorption cycle with a toxic or inflammable refrigerant;

(g) Internal combustion engines in excess of twenty-five (25) horsepower; and

(h) Air compressors driven by electric motors or internal combustion engines.

D.C. Mun. Regs. tit. 17, r. 17-400

§§ 1.1 and 1.2 of Commissioners' Order No. 301, 945, 5M DCRR §§ 1.1 and 1.2

AUTHORITY: Unless otherwise noted, the authority for this chapter is An Act to regulate steam-engineering in the District of Columbia, approved February 28, 1887, 24 Stat. 427, ch. 272. Sec. 2.