In this explainer
The long road from a data-center plan to a grid connection
How grid studies, utility planning and generation queues shape the wait for a data-center connection.
A data center can have land, a building design and a customer willing to buy its computing capacity, yet still lack a dependable date for electricity. The missing piece is more than a cable. Someone must establish that the surrounding power system can serve the site, identify the work required, and arrange to pay for and build it.
People often describe this as being stuck in “the interconnection queue.” That phrase needs care. There is no single national line containing every power plant and every data center. A generator asks to inject electricity into the system. A data center asks to withdraw it. Both affect the network, but their procedures and decision makers can differ substantially.
Two kinds of connection, two different questions
FERC's generator-interconnection reforms concern generating facilities joining the transmission system. They are not a universal application process for data centers. The agency's explanation of Order 2023 describes studies of new generation, shared network upgrades and requirements intended to move viable projects through the process. Treating that framework as a standard data-center waiting list would confuse supply with demand. FERC: generator interconnection reforms
On the demand side, the local utility is a critical starting point. A prospective customer needs to describe the requested service and expected growth. Regional planning may also be involved, depending on the connection and jurisdiction. The resulting timetable depends on the actual network and arrangements, rather than a national queue number that guarantees a place.
PJM makes the distinction explicit. In its September 2026 explanation of large-load forecasting, it says it does not have a load interconnection queue. It relies on load-serving entities to submit proposed adjustments to its demand forecast, with information about commitments and possible duplicate requests. A forecast entry therefore should not be mistaken for permission to energize a campus. PJM: vetting large-load requests
What engineers are trying to find out
Interconnection studies examine how a proposed connection would affect reliability and which upgrades would address those effects. FERC describes this as a multistep evaluation of system impacts, necessary improvements and associated costs. A study is useful precisely because the answer cannot be read from the size of the nearest power line. FERC: how technical studies fit into interconnection
Think of the network as a shared system rather than a private extension cord. Adding a major injection or withdrawal changes how existing equipment is used. A connection that looks straightforward at the property boundary can create work somewhere else. FERC calls out affected-system studies because a generating project's impacts can extend to a neighboring transmission provider.
The customer's assumptions matter too. A campus opening gradually presents a different planning case from a campus requesting its full demand immediately. An offer to reduce consumption is useful only if the utility can rely on the reduction under specified conditions. A marketing claim of flexibility is not itself an operating agreement or an engineering result.
Why the process can take years
There are at least two different clocks: establishing what must be built and actually delivering it. Finishing an analysis does not manufacture a transformer, secure a route or complete construction. Conversely, starting a building does not prove the network studies are complete. When a developer gives a campus opening date, ask which of these milestones supports it.
For generation, FERC identified rising application volumes, limited transmission capacity and late studies as contributors to backlogs. The older serial approach examined projects individually. That becomes difficult when many proposed resources interact with the same network and the assumptions keep changing. FERC's response includes studying projects together rather than treating each as an isolated request.
Withdrawals can compound the problem. If a project leaves a study group, the remaining projects may need to be reassessed. The network improvements or allocation of costs can change. That does not mean every withdrawal causes a complete restart, but it explains why a queue is more complicated than advancing one position whenever the person ahead leaves.
Data-center demand adds another uncertainty: a proposed campus is not necessarily a committed customer. PJM's 2026 forecast process asks utilities to distinguish firmer commitments from longer-term prospects and to check for requests duplicated elsewhere. Planning for every speculative location as if all will open can overstate the work needed; dismissing real commitments can leave the system unprepared.
Who decides what happens next?
The developer supplies project information and makes commercial commitments. Utilities and transmission providers evaluate service and network requirements. Regional operators coordinate planning where their responsibilities apply. FERC oversees the relevant interstate transmission tariffs; state and local authorities retain other responsibilities. Which organization controls a particular milestone depends on the region and the type of connection.
This division matters when a company says it has “power secured.” The statement might refer to a supply contract, a utility agreement or a future allocation. Those are not interchangeable. Ask whether the claim covers delivery to the site, the date and quantity of service, and any conditions that could prevent full operation.
There is also a separate bill for the work. The party studying an upgrade, the party constructing it and the parties ultimately paying can differ. Our companion explainer on who pays for data-center grid upgrades follows that financial side. Knowing the cost allocation helps explain why an engineering solution may still need a commercial agreement.
What can genuinely speed things up?
Better information early in development can reduce avoidable surprises. FERC's generator rules require public capacity information intended to help applicants identify possible connection points. That information is a screening aid, not a binding offer of service. A favorable map location still needs the applicable assessment, and a generator-oriented map should not be presented as a ready-made data-center reservation system.
Readiness requirements are another tool. FERC's reforms use deposits, site-control requirements and withdrawal penalties to discourage speculative generator applications from occupying scarce study resources. The tradeoff is that developers need to commit more before all uncertainties disappear. Faster processing does not mean every applicant can proceed without financial risk.
Cluster studies can evaluate interacting generators together. Study deadlines, affected-system procedures and consideration of alternative transmission technologies address other sources of delay. These reforms improve how the work is organized; they do not guarantee that a particular project will obtain inexpensive upgrades or an immediate connection. The applicable provider's approved process still matters.
On the demand side, realistic staging and dependable demand reductions may help a utility design service around actual needs. DOE identifies flexibility, efficiency, grid improvements and planning as complementary approaches to growing data-center demand. None makes an otherwise inadequate connection automatically sufficient. The value of a smaller initial load or flexible service must be demonstrated for the location in question. DOE: approaches to meeting data-center demand
A power contract does not finish the connection
A campus can support a new generating project through a long-term purchase agreement while still waiting for delivery infrastructure. Likewise, buying energy from an existing plant does not create additional local network capacity. Our guide to where data centers get their power separates physical supply, commercial contracts and environmental claims.
To evaluate a schedule, ask for concrete milestones: completed studies, identified upgrades, signed service terms and the planned sequence for energization. Ask whether an announced capacity is an initial phase or an eventual buildout. If the public record does not answer those questions, the responsible conclusion is that the timetable remains uncertain—not that the project is imaginary or guaranteed.
Why it matters
Connection delays can postpone useful computing even when a building is ready. Rushing without reliable information can create different problems: unnecessary investment, unreliable service or costs that other customers did not expect. The goal is a connection that works under its promised conditions. Understanding the two kinds of interconnection helps readers judge whether a project has crossed that threshold.
Sources and further reading
The linked FERC explainers describe generator procedures, not a national load queue. PJM's Sep 29, 2026 statement supports the regional load-forecast distinction. DOE provides the wider planning context. For the physical equipment between the network and a campus, continue with our grid connection explainer.