Rule 4901:1-22-03 | Industry standards.
(A) No later than thirty calendar days after the effective date of this rule, each EDU shall make a filing with the commission of the TIIR governing the safe, reliable, high-quality interconnection of DERs. The filing should contain appropriate criteria and interconnection parameters for a customer's DER technology and use case so as not to impose technical or economic barriers to new technology pursuant to division (A) of section 4928.11 of the Revised Code or exceed specifications for net energy metering systems pursuant to division (D) of section 4928.67 of the Revised Code. The TIIR filing should be consistent with all of the following:
(1) The institute of electrical and electronics engineers (IEEE) Std 1547-2018;
(2) The underwriters laboratories (UL) 1741-SB;
(3) The national fire and protection association (NFPA) including the national electric code (NEC), NFPA 70® NEC® 2023.
(B) If the commission does not act upon the initial filing made under paragraph (A) of this rule within sixty calendar days of the filing date, the initial filing will be deemed automatically approved on the sixty-first day after the filing date.
(1) The commission or an ALJ may suspend a filing made under paragraph (A) of this rule upon the request of staff or upon good cause shown.
(2) If the commission or an ALJ suspends a filing, the commission will:
(a) Docket its decision, notify the EDU of the reasons for such suspension, and may direct the EDU to furnish any additional information as the commission deems necessary to evaluate the TIIR filing.
(b) Act to approve or deny the technical filing within ninety calendar days from the date the TIIR filing was suspended. If the commission fails to act within ninety calendar days from the date the TIIR filing was suspended, the TIIR filing will be deemed automatically approved.
(c) At its discretion, set the matter for a hearing.
(C) If an EDU wishes to revise, amend, or modify its TIIR provisions approved by the commission under paragraph (B) of this rule, the EDU may make a filing to revise, amend, or modify its TIIR with the commission. If the commission does not act on a filing made under paragraph (C) of this rule within forty-five calendar days after the filing date, the filing will be deemed automatically approved on the forty-sixth calendar day after the filing date.
(1) The commission or an ALJ may suspend a filing made under paragraph (C) of this rule upon the request of staff or upon good cause shown.
(2) If the commission or an ALJ suspends a filing, the commission will:
(a) Docket its decision, notify the EDU of the reasons for such suspension, and may direct the EDU to furnish any additional information as the commission deems necessary to evaluate the filing.
(b) Act to approve or deny the filing within ninety calendar days from the date the TIIR filing was suspended. If the commission fails to act within ninety calendar days from the date the filing was suspended, the filing will be deemed automatically approved.
(c) At its discretion, set the matter for a hearing.
(D) An EDU will post on its website the current version of its TIIR approved by the commission under this chapter.
Last updated July 20, 2026 at 9:05 AM
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