Rule 1723. (1) An employer shall assure that an employee does not engage in the
installation activities to which this part applies unless the employee is a licensed
electrician, or the employee is working with, or under the supervision of, a licensed
electrician. A qualified employee is not required to be licensed when working on
utility installation or maintenance such as, but not limited to, substations, switch yards,
and street or highway lighting.
(2) The employer shall insure that all live parts of electrical equipment
operating at 50 volts or more are properly guarded against accidental contact.
(3) The employer shall do all of the following:
(a) Limit access to energized electrical equipment such as, but not limited to,
switch gear, transformers, and service panels, to qualified employees.
(b) Provide, and insure the proper use of, an accident prevention sign on electric
apparatus, equipment, and enclosures. The voltage shall be indicated.
(c) Provide a conductor of an ampacity of not less than the rating of the circuit
breaker or fuses protecting that circuit.
(d) Insure that a bare conductor or earth return is not used for any temporary
(e) Insure that all electrical wiring is protected from physical damage.
History: 1979 AC.
R 408.41724 Electrical installations.
Rule 1724. (1) Electrical apparatus and equipment used for construction operations
shall bear an approved label or marking.
(2) Before work begins, a competent person shall ascertain by inquiry, observation,
or instruments whether any part of an electric power circuit, exposed or concealed, is so
located that, in performance of the work, contact by an employee, tool, or equipment
can be made with the circuit.
(3) Any employee shall not be permitted to be in proximity to any part of an
electric power circuit that he may contact unless the employee is protected against
electric shock by de-energizing the circuit and locking out and tagging it, or unless the
employee working on an energized circuit is guarded by insulation, insulated tools, or
insulating matting or blankets sufficient to protect against the voltage involved.
(4) Where an electrical power circuit exists that can be contacted by an employee,
the employer shall do both of the following:
(a) Post and maintain accident prevention signs prescribed in Part 22. Signals,
Signs, Tags, and Barricades, being R 408.42201 et seq. of the Michigan Administrative
(b) Advise the employee of the location of the lines, hazard involved, and
protective measures taken or to be taken.
(5) When an employee is using a jack hammer, bar, or other tool which could
come in contact with an underground line, the energy source shall be de-energized.
(6) A work space of not less than 3 feet wide and 6 1/2 feet high, in addition to
space necessary to open equipment doors not less than 90 degrees, shall be provided
and maintained in the area of electrical equipment.