Mich. Admin. Code R. 408.41466 - Electrical requirements
Rule 1466.
(1) A
power line shall be well separated or insulated from water lines, telephone
lines, and air lines.
(2) Lighting
circuits shall be located so that the movement of personnel or equipment will
not damage the circuits or disrupt service.
(3) Electrical equipment and wiring shall be
installed and maintained as prescribed in the provisions of subparts F to J of
part 77 of the provisions of 30 C.F.R., Mineral Resources, Parts 1-199 "Mine
Safety and Health Administration, Department of Labor," as adopted in
R
408.41410. The provisions of subparts F to J are
adopted with the following amendments:
(a)
Article 305-1(a) is amended to read as follows: Temporary electrical power and
lighting installations shall be permitted during the period of construction,
remodeling, maintenance, repair, or demolition of buildings, structures,
equipment, or similar activities which are located at ground level and which
are part of facilities used for the construction of tunnels, shafts, and
cofferdams.
(b) Article 310-15, is
amended to read as follows: The maximum continuous ampacities for copper,
aluminum, and copper-clad aluminum conductors shall be as specified in table
310-16 to 310-19 and accompanying notes 1 to 12. Power and lighting circuits
may be loaded to the maximum design temperatures of the wire or cable
insulation under the following conditions:
(i) A means shall be provided to disconnect
the load if the feeder cable exceeds design temperature by more than 10% for 1
minute.
(ii) Power cable shall have
a grounding and a pilot wire that conforms to the Insulated Power Cable
Engineers Association (IPCEA) type G grounded cable (G-GC) or
equivalent.
(iii) Power cable shall
have a loose connector emergency shutdown ability.
(iv) Power cable shall have a ground fault
emergency shutdown ability.
(v)
Power cable shall have an arc between phases emergency shutdown
ability.
(c) Oil filled
transformers shall not be used underground unless they are located in a
fire-resistant enclosure suitably vented to the outside and surrounded by a
dike to retain the contents of the transformer in the event of
rupture.
(4) All
electrical power circuits that supply portable or hand-held tools, lights, or
equipment shall be protected by approved ground-fault interrupters as
prescribed in Construction Safety Standard Part 17 "Electrical Installations,"
as referenced in
R
408.41410.
(5) The regular system of illumination shall
be supplemented by lighting that can be activated upon the failure of the
regular system. Supplemental lighting, such as approved flashlights or
lanterns, shall be sufficient to allow all employees to evacuate the
tunnel.
(6) Electrical installation
in underground areas where oil, grease, or diesel fuel are stored shall be used
only for lighting fixtures.
(7)
Lighting fixtures in storage areas, or within 25 feet (7.62 meters) of
underground areas where oil, grease, or diesel fuel are stored, shall be
approved for class I, division 2 locations, as prescribed in Construction
Safety Standard Part 17 "Electrical Installations," as referenced in
R
408.41410.
Notes
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