FERC Orders All Six US Grid Operators to Defend or Rewrite Large-Load Interconnection Rules Within 60 Days
FERC issued unanimous show-cause orders to all six regional grid operators, giving them until August 17 to justify or revise how data centers above 20 MW connect to the grid.
Overview
The Federal Energy Regulatory Commission has voted unanimously to issue tailored show-cause orders under Section 206 of the Federal Power Act, directing all six regional grid operators under its jurisdiction to justify or rewrite the rules that govern how large electricity users connect to the transmission system, according to POWER Magazine. The orders, issued on June 18, 2026, target the way data centers and other large loads link into the grid at a moment when artificial intelligence build-out is reversing years of flat electricity demand.
The action is one of the broadest interconnection interventions the commission has taken in recent memory. According to POWER Magazine, the orders will affect 200 million Americans in more than 30 states and the District of Columbia, covering nearly two-thirds of electricity load served under commission-jurisdictional rates.
What We Know
The orders apply to PJM Interconnection, the Midcontinent Independent System Operator (MISO), Southwest Power Pool (SPP), the California Independent System Operator (CAISO), ISO New England (ISO-NE), and the New York Independent System Operator (NYISO), as reported by POWER Magazine. The same six regional transmission organizations and independent system operators are named by Power Engineering, which identifies the proceeding as Docket RM26-4-000.
The rules in question concern large electrical loads — specifically those exceeding 20 megawatts, such as the energy demanded by AI data centers, according to the American Action Forum. Each grid operator now faces a two-part choice. Within 60 days of issuance, by August 17, 2026, the identified ISOs and RTOs and their transmission owners must either show cause why their tariff remains just and reasonable or submit proposed tariff revisions, as reported by The National Law Review.
A shorter deadline runs in parallel. According to Power Engineering, within 30 days each grid operator and its transmission owners must submit a detailed informational report. The National Law Review specifies that this report must detail any proposals under consideration in the operator’s stakeholder process to address resource adequacy to serve new large loads — in other words, how each region intends to ensure enough generation exists to power the facilities now lining up to connect.
The commission’s orders focus on five main concerns, according to The National Law Review: developing efficient transmission service application and study processes, including the consideration of alternative transmission technologies; preventing cost-shifting and requiring transparency into transmission costs; accommodating co-location agreements and behind-the-meter generation; providing new transmission services for flexible large loads; and developing a process to study generating facilities that serve “electrically proximate” large loads. Utility Dive lists the same five issues in its account of the decision.
FERC Chairman Laura V. Swett framed the action as forward-looking. “We are setting the stage for a resilient, reliable, and forward-thinking grid that empowers communities and safeguards consumers by transforming the way large energy users access the grid,” she said, according to POWER Magazine. In a separate statement reported by Utility Dive, Swett described the move as “historic action to push our country’s electric markets and economy into the future — a future of fair cost allocation, unprecedented transparency for the American ratepayer, respect for states’ rights, efficient markets and speed to power.”
How It Came About
The orders did not emerge in a vacuum. According to Utility Dive, in October the U.S. Department of Energy directed FERC to establish rules for enabling data center interconnection to the transmission system, and FERC’s response to the DOE’s advanced notice of proposed rulemaking drew more than 3,500 pages of comments. The American Action Forum describes the June action as one that directly fulfills a 2025 request aimed at accelerating grid interconnection for large-load energy users — specifically AI data centers — amid unprecedented energy demand.
The underlying driver is a demand shift that has been visible across the sector for two years. Utility Dive reports that FERC’s decision was driven by a massive wave of data center development that started about two years ago, after years of generally flat electric demand growth in the United States.
The Department of Energy welcomed the move. Energy Secretary Chris Wright said meeting that demand “requires building more energy infrastructure and bringing new power online faster,” according to the Department of Energy. Deputy Secretary James P. Danly called it “an important step toward improving interconnection processes, supporting flexible load and generation arrangements, and accelerating the addition of new generation,” the same DOE statement reported.
What We Don’t Know
The orders set the agenda, but the outcome rests with the operators. Each region can defend its existing tariff or propose its own revisions, and FERC has not prescribed a single national template — meaning the rules that eventually govern data center interconnection could differ across PJM, MISO, SPP, CAISO, ISO-NE, and NYISO. How aggressively each operator chooses to rewrite its tariff, and how FERC responds to those filings after the August 17 deadline, will determine the practical effect.
It is also unclear how the resource-adequacy question will be resolved. The 30-day informational reports are meant to surface proposals under consideration in each region’s stakeholder process, but a report describing proposals is not the same as a binding plan to build new generation. The central tension the orders try to manage — connecting multi-hundred-megawatt loads quickly without shifting their costs onto ordinary ratepayers — will play out over the filings and proceedings that follow, not in the June 18 orders themselves.
Analysis
The significance of the action lies less in any single rule than in its scope and uniformity. By issuing parallel Section 206 orders to every FERC-jurisdictional grid operator at once, the commission has effectively put the entire organized-market footprint on the same clock. The five concerns it identified — study-process efficiency, cost transparency, co-location, flexible-load services, and proximate-generation studies — read as a catalog of the friction points that have slowed large-load interconnection during the AI build-out, and the short timelines signal that FERC wants answers in weeks rather than the multi-year horizons that have characterized interconnection reform in the past. Whether that urgency translates into faster connections without cost-shifting onto existing customers is the open question the coming filings will begin to answer.