Iowa Admin. Code r. 199-20.5 - Engineering practice
(1)
Requirement for good engineering practice. The electric plant
of the utility shall be constructed, installed, maintained and operated in
accordance with accepted good engineering practice in the electric industry to
assure, as far as reasonably possible, continuity of service, uniformity in the
quality of service furnished, and the safety of persons and property.
(2)
Standards incorporated by
reference. The utility shall use the applicable provisions in the
publications listed below as standards of accepted good practice unless
otherwise ordered by the board.
a. Iowa
Electrical Safety Code, as defined in 199-Chapter 25.
b. National Electrical Code, ANSI/NFPA
70-2014.
c. American National
Standard Requirements for Instrument Transformers, ANSI/IEEE C57.13.1-2006; and
C57.13.3-2005.
d. American National
Standard for Electric Power Systems and Equipment Voltage Ratings (60 Hertz),
ANSI C84.1-2011.
e. Grounding of
Industrial and Commercial Power Systems, IEEE 142-2007.
f. IEEE Standard 1159-2009, IEEE Recommended
Practice for Monitoring Electric Power Quality or any successor
standard.
g. IEEE Standard
519-2014, IEEE Recommended Practices and Requirements for Harmonic Control in
Electrical Power Systems or its successor standard.
h. At railroad crossings,
199-42.6 (476), "Engineering
standards for electric and communications lines."
(3)
Adequacy of supply and
reliability of service. The generating capacity of the utility's
plant, supplemented by the electric power regularly available from other
sources, must be sufficiently large to meet all normal demands for service and
provide a reasonable reserve for emergencies.
In appraising adequacy of supply the board will segregate electric utilities into two classes viz., those having high capacity transmission interconnections with other electrical utilities and those which lack such interconnection and are therefore completely dependent upon the firm generating capacity of the utility's own generating facilities.
a. In the case of utilities having
interconnecting ties with other utilities, the board will, upon appraising
adequacy of supply, take appropriate notice of the utility's recent past
record, as of the date of appraisal, of any widespread service interruptions
and any capacity shortages along with the consideration of the supply regularly
available from other sources, the normal demands, and the required reserve for
emergencies.
b. In the case of
noninterconnected utilities the board will give attention to the maximum total
coincident customer demand which could be satisfied without the use of the
single element of plant equipment, the disability of which would produce the
greatest reduction in total net plant productive capacity and also give
attention to the normal demands for service and to the reasonable reserve for
emergencies.
(4)
Electric transmission and distribution facilities. Rescinded
IAB 11/13/02, effective 12/18/02.
(5)
Inspection of electric
plant. Rescinded IAB 12/5/18, effective 1/9/2019.
This rule is intended to implement Iowa Code section 476.8 and 478.18.
Notes
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