West Virginia Code of State Rules › Agency 36 - Coal Mine Health And Safety › Title 36 - LEGISLATIVE EXEMPT RULE BOARD OF COAL MINE HEALTH AND SAFETY › Series 36-09 - Electrical Provisions In Shaft and/or Slope Construction Operations › Section 36-9-3 - Definitions

Current through Register Vol. XLI, No. 28, July 12, 2024
3.1. Approved. --
				The term "approved" shall mean in strict compliance with mining law, or in the
				absence of law, accepted by a recognized standardizing body or organization
				whose approval is generally recognized as authoritative on the
				subject.
3.2. Permissible. -- The
				term "permissible" shall mean any equipment, device or explosive that has been
				approved as permissible by the United States Bureau of Mines and meets all
				requirements, restrictions, exceptions, limitations and conditions attached to
				such classification by the Bureau.
3.3. Certified Electrician. -- The term
				"certified electrician" shall mean any person who is qualified as a mine
				electrician and who has passed an examination given by the Department of
				Energy, or has at least three years of experience in performing electrical work
				underground in a coal mine, in the surface work areas of an underground coal
				mine, in a surface coal mine, in a non-coal mine, in the mine equipment
				manufacturing industry, or in any other industry using or manufacturing similar
				equipment, and has satisfactorily completed an electrical training program
				approved by the Department of Energy.
3.4. Armored Cable. -- The term "armored
				cable" shall mean a cable provided with a wrapping of metal, usually steel
				wires or tapes, primarily for the purpose of mechanical protection.
3.5. Borehole Cable. -- The term "borehole
				cable" shall mean a cable designed for vertical suspension in a borehole or
				shaft and used for power circuits in the mine.
3.6. Cable. -- The term "cable" shall mean a
				standard conductor (single conductor cable) or a combination of conductors
				insulated from one another, (multiple conductor cable).
3.7. Flame-Resistant Cable, Portable. -- The
				term "flame-resistant cable, portable" shall mean a portable flame-resistant
				cable that has passed the flame tests of the federal bureau of mines.
3.8. Portable (Training) Cable. -- The term
				"portable (training) cable" shall mean a flexible cable or cord used for
				connecting mobile, portable or stationary equipment to an external source of
				electric energy where permanent mine wiring is prohibited or is
				impracticable.
3.9. Branch Circuit.
				-- The term "branch circuit" shall mean any circuit, alternating current,
				connected to and leading from the main power lines.
3.10. Circuit Breaker. -- The term "circuit
				breaker" shall mean a device for interrupting a circuit between separable
				contacts under normal or abnormal conditions.
3.11. Zig-zag Transformer (Grounding
				Transformer). -- The term "zig-zag transformer (grounding transformer)" shall
				mean a transformer intended primarily to provide a neutral point for grounding
				purposes.
3.12. Neutral Point. --
				The term "neutral point" shall mean the connection point of transformer or
				generator windings from which the voltage to ground is nominally zero, and is
				the point generally used for system groundings in wye-connected a.c. power
				system.
3.13. Neutral (Derived). --
				The term "neutral (derived)" shall mean a neutral point or connection
				established by the addition of a zig-zag or grounding transformer to a normally
				ungrounded power system.
3.14.
				Effectively Grounded. -- The term "effectively grounded" is an expression which
				means grounded through a grounding connection of sufficiently low impedance
				(inherent or intentionally added or both) so that fault grounds: which may
				occur cannot build up voltages in excess of limits established for apparatus,
				circuits or systems so grounded.
3.15. Grounded (Earthed). -- The term
				"grounded (earthed)" shall mean that the system, circuit, or apparatus referred
				to is provided with a ground.
3.16.
				Ground or Grounding Conductor (Mining). -- The term "ground or grounding
				conductor (mining)", also referred to as a safety ground conductor, safety
				ground and frame ground, shall mean a metallic conductor used to connect the
				metal frame or enclosure of any equipment, mine track device or wiring system
				to an effective grounding medium.
3.17. Delta Connected. -- The term "delta
				connected" shall mean a power system in which the windings or transformers or
				A. C. generators are connected to form a triangular phase relationship, and
				with phase conductors connected to each point of the triangle.
3.18. Wye-connected. -- The term
				"wye-connected" shall mean a power system connection in which one end of each
				phase windings or transformers or a.c generators are connected together to form
				a neutral point, and a neutral conductor may or may not be connected to the
				neutral point, and the neutral point may or may not be grounded.
3.19. High Voltage. -- The term "high
				voltage" shall mean voltages of more than one thousand volts.
3.20. Medium Voltage. -- The term "medium
				voltage" shall mean voltages from six hundred sixty-one to one thousand
				volts.
3.21. Low Voltage. -- The
				term "low voltage" shall mean up to and including six hundred sixty
				volts.
3.22. Lightning Arrester. --
				The term "lightning arrester" shall mean a protective device for limiting surge
				voltage on equipment by discharging or bypassing surge current to ground, and
				is capable of repeating these functions as specified.
3.23. Power Center or Distribution Center. --
				The term "power center or distribution center" shall mean a combined
				transformer or distribution unit, complete within a metal enclosure from which
				one or more power circuits are taken.