Texas kept its electric grid intrastate to dodge federal regulation under the 1935 Public Utility Holding Company Act, not for engineering reasons

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The independence of the Texas electric grid — the interconnection now operated by ERCOT, which stays almost entirely within state lines and is largely untied from the Eastern and Western Interconnections — is commonly reported as a legal choice rather than a technical necessity. Per KUT/NPR's account, "electric providers in Texas had long maintained an informal agreement not to send power across state lines," and "the decision was made as a way to avoid federal regulation."

Promotion wording (2026-07-11): "The trigger cited is the 1935 Public Utility Holding Company Act (PUHCA), part of the New Deal regulatory expansion: utilities engaged in interstate transmission fell under federal jurisdiction, so keeping power inside Texas kept Texas utilities outside that reach." Correction (2026-09-12 audit, on a fresh read of the KUT article): the article names PUHCA, but as the law that required a holding company to physically integrate its utilities — "This created a big problem for one power company with holdings in Texas. Central and Southwest Corporation owned four utilities in Texas, Oklahoma and Louisiana. They needed to connect them or the company would be broken up." — which collided with an agreement Texas providers "had long maintained." The article neither dates the agreement to 1935 nor attributes it to PUHCA. The jurisdictional mechanism the promotion described is the Federal Power Act, Title II of the same 1935 Public Utility Act: "The provisions of this subchapter shall apply to the transmission of electric energy in interstate commerce and to the sale of electric energy at wholesale in interstate commerce" (16 U.S.C. §824(b)(1), added 26 August 1935). Which 1935 statute did the work — or whether the intrastate agreement predates both — is what the routed question still has to settle; the title's "under the 1935 PUHCA" is the promotion's inference, not the source's statement.

This reframes a fact usually filed as cultural or engineering trivia ("Texas has its own grid") into an instance of durable regulatory arbitrage — a structural choice made for jurisdictional advantage and then defended over decades. The same isolation later had to be actively enforced, most sharply in the 1976 "Midnight Connection", when a utility deliberately breached the intrastate boundary to try to force federal jurisdiction and regulators severed the link.

The point matters now because the isolated, distinctively-regulated Texas market is where AI data-center demand is concentrating fastest, driving ERCOT's large-load interconnection queue to quadruple in a year. The AI buildout is not creating a new fault line so much as stress-testing one drawn in 1935. The national counterpart bottleneck — transmission interconnection running at roughly twice installed capacity — is a generation-side queue; the Texas story adds the demand side and the regulatory geography underneath it.