Mich. Admin. Code R. 460.3702 - Standard nominal service voltage; limits; exceptions
Rule 702.
(1) Each
electric utility or cooperative shall adopt and submit standard nominal service
voltages.
(2) With respect to
secondary voltages, the following provisions shall apply:
(a) For all retail service, the variations of
voltage must not be more than 5% above or below the standard nominal voltage as
submitted pursuant to subrule (1) of this rule, except as noted in subrule (4)
of this rule.
(b) Where 3-phase
service is provided, the electric utility or cooperative shall exercise
reasonable care to ensure that the phase voltages are balanced within practical
tolerances.
(3) With
respect to primary voltages, the following provisions apply:
(a) For service rendered principally for
industrial or power purposes, the voltage variation must not be more than 5%
above or below the standard nominal voltages as submitted pursuant to subrule
(1) of this rule, except as noted in subrule (4) of this rule.
(b) The limitations in subdivision (a) of
this subrule do not apply to special contracts in which the customer
specifically agrees to accept service with unregulated voltage.
(4) Voltages above or below the
limits specified in subrules (2) and (3) of this rule may not be considered a
violation if the variations are infrequent fluctuations or occur from adverse
weather conditions, service interruptions, causes beyond the control of the
electric utility or cooperative, or voltage reductions that are required to
reduce system load at times of supply deficiency or loss of
supply.
Notes
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