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The pathway for adding data centers to the U.S. transmission system became clearer last week when the Federal Energy Regulatory Commission found that major grid operators’ rules for large load interconnections appeared to be inadequate.

“We take 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,” FERC Chairman Laura Swett said in a concurring statement with the six orders the agency issued Thursday.

In its “show cause” orders, FERC detailed five issues it wants regional transmission organizations and independent system operators to address in their large load interconnection rules:

efficient transmission service application and study processes, including the consideration of alternative transmission technologies;