When this service helps
Before selecting new equipment, establish whether the existing electrical system can support it. A capacity study is useful when an apartment needs more power, a building is considering heat pumps, or a garage is adding EV charging. It can also help an owner compare a limited renovation with a larger infrastructure upgrade.
What the engineering scope addresses
We trace the proposed loads through the equipment that supplies them: branch circuits, panels, feeders, risers, and the building service as relevant to the scope. Available drawings, equipment information, operating records, and site observations form the basis of the assessment. The report distinguishes verified conditions from assumptions and identifies information that remains to be confirmed.
Planning the next step
A panel's main breaker rating alone does not establish available capacity throughout the building. Existing demand, conductor and equipment limitations, and the way new loads operate together all matter. Depending on the findings, the next step may be a design within existing capacity, a load-management strategy, additional measurements, or a service and distribution upgrade. Utility capacity must be coordinated separately when relevant.
Potential deliverables
- Existing service, feeder, riser, and panel assessment
- Demand and connected-load calculations
- Capacity findings, assumptions, and upgrade recommendations
The proposal confirms the exact deliverables and any site visits, follow-up review, filing support, or construction services included.
What to prepare
- Available one-line diagrams, risers, and panel schedules
- List of existing and proposed equipment with ratings
- Available demand records and metering information
- Access arrangements for relevant electrical rooms
Share what is available and identify records that are missing. We can help define the initial engineering scope around the information and access your project has.
Related guidance
Can Your NYC Building Support More Electrical Load?
Our resource library includes practical checklists and links to official NYC documents.