20.50.12.10

.10 Periodic Equipment Inspections.

A. Each utility shall adopt and follow written operation and maintenance procedures for its electric plant in order to maintain safe and reliable service. The operation and maintenance programs shall account for the utility's experience, good engineering practices, and judgment, and manufacturer’s recommendations.

B. Each electric utility shall file its written operation and maintenance programs required under §A of this regulation with the Commission within 60 days from the effective date of these regulations and the programs shall be designed to achieve, at a minimum, the level of reliability established by the Commission's regulations.

C. If the electric utility makes a material change to its written operation and maintenance programs required under §B of this regulation, the utility shall file the change with the Commission not less than 60 days prior to implementing the change, unless exigent circumstances warrant implementation without prior notice, in which case the change shall be filed by no later than 30 days after implementation. The filing shall describe each change and the reason for the change.

D. The operation and maintenance programs required by §B of this regulation shall:

(1) Include the frequency or triggers for performing an inspection;

(2) Identify the electric plant inspections to be performed including, but not limited to:

(a) Poles;

(b) Overhead and underground conductors and cables;

(c) Transformers;

(d) Switching and protective devices;

(e) Substations;

(f) Regulators; and

(g) Capacitors; and

(3) Identify acceptance criteria for the inspections.

E. Except as provided under §D of this regulation and Regulation .09 of this chapter, the operation and maintenance programs required by §B of this regulation need not include detailed procedures.

F. Each utility shall maintain sufficient records to give evidence of compliance with its operation and maintenance programs and shall demonstrate compliance with its program in its annual performance report.

G. If a utility fails to comply with its operation and maintenance programs, the utility shall provide a corrective action plan, preferably in its annual performance report but by no later than April 1.

H. The following electric distribution plant shall be inspected consistent with the following minimum frequency intervals measured from the effective date of these regulations:

(1) Poles — 10 years;

(2) Overhead primary distribution lines from the substation to the first protective device — 2 years;

(3) Above-ground pad-mounted transformers — 5 years;

(4) Below-ground transformers — 5 years; and

(5) Substations — 2 months.

I. A utility may request an interval greater than the intervals listed in §H of this regulation. The request shall include an explanation of any change in the utility's cost to perform the inspection and the expected reliability impact resulting from the change.