Michigan Administrative Code › Department - Labor and Economic Opportunity › MIOSHA › General Industry and Construction Safety and Occupational Health Standards › General Industry Safety Standards › Part 57 - OIL AND GAS DRILLING AND SERVICING OPERATIONS › CONSTRUCTION › Section R. 408.15725 - Electrical installations

Current through Vol. 24-12, July 15, 2024
Rule 5725.
(1)
						Except as required in this rule, electrical installations and equipment shall
						be as prescribed in the national electrical code, NFPA 70-1981, which is
						adopted herein by reference and may be inspected at the Department of Licensing
						and Regulatory Affairs, MIOSHA Standards Section, 7150 Harris Drive, P.O. Box
						30643, Lansing, Michigan, 48909-8143. This code may be purchased at the cost of
						$27.00 from the National Fire Protection Association, Batterymarch Park, P.O.
						Box 9101, Quincy, Massachusetts 02269-9101, or via the internet at web-site:
www.nfpa.org
.
(2) Electrical equipment such as lighting,
						power tools, and other electrical motors used in hazardous locations shall be
						designed for such locations and where practicable, listed by a nationally
						recognized testing laboratory. All wiring components and electrical equipment
						shall be maintained in accordance with the original design. Because of exposure
						to vibration and frequent rig moves, maximum use shall be made of flexible
						electrical cord intended for hard usage and with inherent resistance to
						dampness and petroleum products.
(3) On a land location, an engine-driven
						light plant or generator shall not be located closer to the wellbore than the
						nearest engine operating the rig.
(4) A light plant generator shall have a
						overload safety device to provide protection from arcing in a hazardous area or
						from a burnout of the generator.
(5) Rig lighting equipment, except that used
						in a cellar, shall be classified as class 1, division 2.
(6) Cellar lighting equipment shall be
						classified class 1, division 1.
(7)
						The following area classifications shall determine the type of maintenance
						requirements for electrical equipment on the rig under normal operating
						conditions. When special service operations are being performed, the
						requirements for electrical installations under the conditions of service
						listed in subdivisions (a) to (h) of this subrule shall be followed:
(a) When the derrick or mast is not enclosed
						or is equipped with a windbreak (open top and V-door) and the substructure is
						open to ventilation, the areas shall be classified as shown in figure 1 and
						shall provide not less than 12 complete air changes per hour.
(b) If the rig floor and substructure are
						enclosed and as such, provide not less than 12 complete air changes per hour,
						the areas shall be classified as shown in figure 2.
(c) Where appropriate, the area surrounding a
						drilling fluid tank located outdoors shall be provided with ventilation of not
						less than 12 complete air changes per hour and shall be classified as shown in
						figure 3.
(d) If the drilling fluid
						tank is enclosed or located so as to provide not less than 12 complete air
						changes per hour, the areas shall be classified as shown in figure 4.
(e) The areas surrounding a shale shaker with
						ventilation of not less than 12 complete air changes per hour shall be
						classified as shown in figure 5.
(f) When the shale shaker is enclosed, the
						area within the enclosure shall be classified as class 1, division 1.
(g) If an open fluid ditch or trench is used
						to connect between drilling fluid tanks, or between the drilling fluid tank and
						shale shaker, or open drilling fluid pits, and if ventilation of not less than
						12 complete air changes per hour is provided the areas shall be classified as
						shown in figure 3 for tanks.
(h)
						The area surrounding the drilling fluid pump shall not be considered hazardous
						unless it is so classified due to the proximity of another hazardous component
						or facility.