Michigan Administrative Code › Department - Labor and Economic Opportunity › MIOSHA › General Industry and Construction Safety and Occupational Health Standards › General Industry Safety Standards › Part 33 - PERSONAL PROTECTIVE EQUIPMENT › ELECTRICAL PROTECTIVE EQUIPMENT › Section R. 408.13388 - Design requirements for other types of electrical protective equipment

Current through Vol. 24-12, July 15, 2024
Rule 3388.
(1)
						The following requirements apply to the design and manufacture of electrical
						protective equipment that is not covered by
						R 408.40650:
(2) Insulating equipment used for the
						protection of employees shall be capable of withstanding, without failure, the
						voltages that may be imposed upon it.
Note 1 to subrule (2): These voltages include transient
						  over-voltages, such as switching surges, as well as nominal line voltage. See
						  General Industry Safety Standard Part 86 "Electric Power Generation,
						  Transmission, and Distribution," Appendix B, as referenced in
						  R
						  408.13301a, for a discussion of transient
						  over-voltages on electric power transmission and distribution systems.
Note 2 to subrule (2): See IEEE 516 "Guide for
						  Maintenance Methods on Energized Power Lines," 2009 edition, as adopted in
						  R
						  408.13301a, for methods of determining the magnitude
						  of transient over-voltages on an electrical system and for a discussion
						  comparing the ability of insulation equipment to withstand a transient
						  overvoltage based on its ability to withstand alternating current voltage
						  testing.
(3) Equipment
						current shall comply with both of the following:
(a) Protective equipment used for the primary
						insulation of employees from energized circuit parts shall be capable of
						passing a current test when subjected to the highest nominal voltage on which
						the equipment is to be used.
(b)
						When insulating equipment is tested pursuant to these rules, the equipment
						current may not exceed 1 microampere per kilovolt of phase-to-phase applied
						voltage.
Note 1 to subrule (3): This rule shall apply to
						  equipment that provides primary insulation of employees from energized parts.
						  It does not apply to equipment used for secondary insulation or equipment used
						  for brush contact only.
Note 2 to subrule (3): For alternating current
						  excitation, this current consists of the following three components:
(a) Capacitive current because of the
						dielectric properties of the insulating material itself.
(b) Conduction current through the volume of
						the insulating equipment.
(c)
						Leakage current along the surface of the tool or equipment.
The conduction current shall be normally negligible.
						  For clean, dry insulating equipment, the leakage current shall be small, and
						  the capacitive current shall predominate.
Note 3 to subrule (3): Plastic guard equipment is
						  considered to conform to the performance requirements of this rule, if it
						  meets, and is used in accordance with ASTM F-712 "Standard Test Methods and
						  Specifications for Electrically Insulating Plastic Guard Equipment for
						  Protection of Workers," 2006 edition with 2011 supplement, as adopted in
						  R
						  408.13301a.