Illinois Administrative Code › Title 62 - MINING › Part 220 - SURFACE INSTALLATION HEALTH AND SAFETY › Section 220.50 - Electrical Equipment-General

Current through Register Vol. 48, No. 28, July 12, 2024
a)
			 Electric power circuits and electric equipment; deenergization.
Power circuits and electric equipment shall be deenergized
				before work is done on such circuits or equipment, except when necessary for
				trouble-shooting or testing. Disconnecting devices shall be locked out and
				suitably tagged by the persons who perform such work, except that in cases
				where locking out is not possible, such devices shall be opened and suitably
				tagged by such persons. Locks and tags shall be removed only by the persons who
				installed them, or, if such persons are unavailable, by persons authorized by
				the operator or his agent.
b) Electric circuits and equipment; repair.
No electrical work shall be performed on electric circuits or
				equipment except by a person qualified to perform electrical work and to
				maintain electrical equipment, or by a person trained to perform electrical
				work and to maintain electrical equipment at the direction of a qualified
				person. When such work is done by a trained person, the circuits or equipment
				shall be examined by a qualified person to assure safe operating condition
				before such circuits or equipment are energized.
c) Electric equipment; examination, testing,
			 and maintenance.
Electric equipment shall be frequently examined, tested and
				properly maintained by a person qualified to perform electrical work and to
				maintain electrical equipment to assure safe operating conditions. When a
				potentially dangerous condition is found on electric equipment, such equipment
				shall be identified and be removed from service until such condition is
				corrected. A record of such examinations shall be kept in an approved book, and
				shall include all dangerous conditions found, corrective actions taken, and the
				signature of the qualified person conducting the examination or testing. The
				record of examinations shall be signed by the person responsible for
				maintaining the equipment in safe operating condition, who shall also be a
				person qualified to perform electrical work and maintain electrical equipment,
				and records shall be made available for inspection by an authorized
				representative of the Department and the authorized representative of miners of
				such mine.
d) Electric
			 equipment; examination and testing.
A potentially dangerous condition within the meaning of Section
				220.50(c)
				shall include without limitation, exposed conductors, improper frame grounding,
				missing guards, missing inspection covers, poorly-made splices in conductors,
				improper terminations, improper overload or short circuit protection, broken
				conduit, missing or malfunctioning safety devices, inoperative indicating
				lights, inoperative ground fault protection, defective monitoring circuits, and
				inadequate ground fields.
e) Qualified person.
A qualified person within the meaning of Sections
				220.50(b),
				220.50(c),
				220.60(b),
				220.80(b)
				and Section
				220.90 of this
				Part is an individual who has been qualified as a coal miner electrician under
				30 CFR
				77.103, or anyone who may be so qualified in
				the future as a coal miner electrician by the Department, if and when such
				Department adopts rules affecting coal miner electrician certification.
f) Electric equipment; frequency
			 of examination and testing.
The examinations and test required under the provisions of
				Section
				220.50(c)
				shall be conducted as interpreted in the Mining Enforcement Safety
				Administration (MESA) Inspector's Manual at least monthly or more often if
				necessary to assure safe operating conditions. State Mine Inspectors shall be
				presented evidence of qualifications upon request.
g) Electric conductors; capacity and
			 insulation.
Electric conductors shall be sufficient in size and have
				adequate current-carrying capacity and be of such construction that a rise in
				temperature resulting from normal operation will not damage the insulating
				materials.
h) Electric
			 Conductors.
Electric conductors, installed inside surface buildings and
				structures, shall be sufficient in size to meet the minimum current-carrying
				capacity provided for in the National Electrical Code in effect at the time of
				installation.
i) Electric
			 conductors; mobile and portable equipment.
Trailing cable, portable cables, and electric conductors
				installed in mobile or portable equipment shall have ampacities and
				construction in accordance with the specifications of Insulated Power Cable
				Engineers Association-National Electrical Manufacturers Association in effect
				at time of purchase and the conductors shall be sufficient in size so that a
				rise in temperature resulting from normal operation will not damage the
				insulating material.
j)
			 Electrical connections or splices; suitability.
Electrical connections or splices in electric conductors shall
				be mechanically and electrically efficient, and suitable connectors or approved
				splicing methods shall be used. All electrical connections or splices in
				insulated wire and cable shall be reinsulated at least to the same degree of
				protection as the remainder of the wire or cable.
k) Cable fittings; suitability.
Cables shall enter metal frames of motors, splice boxes, and
				electric compartments only through proper fittings and shall be secured to
				prevent chaffing of the insulation. When insulated wires, other than wiring
				installed in conduit, pass through metal frames, the holes shall be
				substantially bushed with insulated bushings and the wires be secured.
l) Electric equipment and
			 circuits; overload, short-circuit, and ground fault protection.
Automatic circuit-breaking devices or fuses of the correct type
				and capacity shall be installed so as to protect all electric equipment and
				circuits against short circuit and overloads. Ground fault protection shall be
				provided for equipment, powered by solidly or resistance grounds'
				systems.
m) Electric
			 equipment and circuits; overload and short-circuit protection; minimum
			 requirements.
Devices providing short-circuits and overload protection shall
				conform to the minimum requirements for protection of electric circuits and
				equipment of the National Electrical Code in effect at the time of installation
				except that motors and circuits used in specially designed electrical systems,
				such as those used on some excavators, hoists and elevators, shall be
				considered as being provided with overload protection if the design of the
				system prevents the motors and associated circuits from being subjected to
				harmful overloads.
n)
			 Electric equipment-switches.
All electric equipment contracted for after the effective date
				of this regulation shall be provided with switches or other controls that are
				safely designed, constructed, and installed. The voltage of alternating current
				remote control circuits that are installed external to the controller enclosure
				shall not exceed one hundred twenty (120) volt.
o) Lightning arresters; ungrounded, exposed
			 power conductors, and telephone wires.
All ungrounded, exposed power conductors, control lines, and
				communication wires shall be equipped with suitable lightning arresters which
				are adequately installed and connected to a low resistance grounding medium in
				accordance with Section
				220.70(f).
p) Lightning arresters; circuits
			 entering or leaving buildings.
Lightning arresters protecting circuits entering or leaving
				buildings shall be provided at a point near where each such circuit enters or
				leaves the building.
q)
			 Transformers and high-voltage equipment; installation and guarding; minimum
			 vertical clearance.
1) Transformers and other
			 high-voltage equipment shall be of the enclosed type, or installed in a
			 transformer house, or surrounded by a substantial fence at least six (6) feet
			 high and at least three (3) feet from any energized parts, casings, or
			 wiring.
2) Enclosures of
			 high-voltage equipment shall be kept locked against unauthorized
			 entry.
3) Electric equipment
			 energized at more than one thousand (1,000) volts and containing unguarded live
			 parts, shall be installed with a minimum vertical clearance above the surfaces
			 where a person would normally stand, as follows:
Voltage Between Phases
Minimum Vertical Clearance of Unguarded Parts:
Feet
Inches
1,000 - 6,600
8
0
6,601 - 11,000
9
0
11,001 - 22,000
9
3
22,001 - 33,000
9
6
33,001 - 44,000
9
10
44,001 - 66,000
10
5
66,001 - 88,000
11
0
88,001 - 110,000
11
7
110,001 - 132,000
12
2