# Do You Need a 200-Amp Service Upgrade During a NYC Rewire? > A 200-amp service is not automatic with K&T replacement. Understand load assessment, panel capacity and utility coordination before adding an upgrade. URL: https://nycknobandtube.com/guide/200-amp-service-upgrade-during-rewire-nyc/ Decision guide A 200-amp service is not automatic with K&T replacement. Understand load assessment, panel capacity and utility coordination before adding an upgrade. By NYC Knob & Tube Experts · Last updated: October 19, 2026 A rewiring proposal arrives with a 200-amp service upgrade included. It may be a sensible part of the project, but the reason should be explained. Finding knob and tube does not, on its own, establish that 200 amps is the right service size. [NYC Knob & Tube Experts](https://nycknobandtube.com/) helps owners separate replacement of old branch wiring from other electrical changes. They can be coordinated, but they answer different questions. Start by asking what the proposed upgrade is intended to supply. ## The service and the circuits do different jobs The electrical service brings power to the property. A panel distributes it through branch circuits to the points where it is used. In a multi-unit building, an apartment may receive power through a feeder from shared service equipment. Replacing K&T concerns the old branch-circuit installation. Upgrading service capacity concerns the supply available to the loads served. A new service does not pull deteriorated conductors out of a ceiling, and new branch wiring does not necessarily require a larger supply. The proposal should identify which parts are being changed. “Electrical upgrade” is too broad if you are trying to determine whether the quote covers a panel replacement, a larger service or both. The [panel-versus-rewiring guide](https://nycknobandtube.com/guide/electrical-panel-upgrade-vs-rewiring/) explains those boundaries in more detail. ## Ask for the basis of the capacity decision The electrician needs to assess the existing supply and the intended demand. A load calculation applies the relevant code method to the installation. It is not simply the sum of every breaker handle in the panel. NYC’s current electrical code contains specific rules for calculating service and feeder loads, including conditions for using measured existing demand. An ordinary monthly energy bill is not automatically the required demand record. The responsible professional should identify the applicable method and the information it needs. See the [NYC Electrical Code](https://www.nyc.gov/assets/buildings/codes-pdf/2025electrical_code.pdf). You should receive an explanation you can understand even if you don’t perform the calculation yourself. Which planned equipment affects the result? What capacity is available? Does the recommendation depend on an appliance choice that has not yet been made? An answer based solely on the age of the house misses those questions. So does a promise that a familiar service size will cover anything you may add later. ## New equipment can change the decision A project that replaces damaged lighting circuits without changing their use differs from a renovation that introduces substantial new electric loads. Planned heating or cooking equipment needs to be part of the discussion. An EV charger may also affect it. Give the electrician actual equipment information when available. The demand of a specific product is more useful than a vague plan to electrify the house. If you haven’t chosen the equipment, ask what assumptions the assessment uses and whether different choices could change the recommendation. That does not mean every added appliance forces a service upgrade. Appropriate lower-demand equipment or a compliant load-management arrangement may be relevant in some projects. EPA discusses lower-powered chargers and load management as possible alternatives in its [home EV charging guidance](https://www.epa.gov/greenvehicles/getting-started-home-ev-charging). They require assessment and approval for the actual installation, not an assumption that a product can be added to any old panel. The decision should account for realistic plans. Paying for capacity that you won’t use and closing finishes around a supply that cannot support an already-planned project are both situations worth avoiding through better information. ## More breaker spaces are not the same as more supply A crowded panel and an inadequate service are different findings. Additional circuit positions don’t automatically increase the current the upstream equipment and conductors can safely supply. Likewise, a panel’s marked maximum rating doesn’t establish that the entire installation operates at that rating. The service arrangement and its protection have to be considered together. Don’t infer a completed 200-amp upgrade from a label on a cabinet. Condition is another separate issue. Equipment might need replacement because it is damaged or unsuitable even when the planned load does not justify a larger service. Ask the contractor to distinguish a condition-based replacement from an increase in capacity. ## An apartment upgrade can involve the wider building The equipment inside your apartment may not be the only limit. Its feeder and the building’s shared supply must also support the proposed work. Changing the apartment panel doesn’t necessarily change either. Before approving a capacity increase, establish who can authorize access to the shared equipment. Management may need technical information about the new demand and the proposed route. Those requirements depend on the building, so a neighboring apartment’s earlier project is not a complete approval template. If a contractor cannot price the job until a locked electrical room is accessible, the missing access needs resolving. A larger number in the proposal cannot substitute for examining the supply. Our [co-op approval guide](https://nycknobandtube.com/guide/co-op-rewiring-approval-nyc/) explains how building permissions fit alongside the electrical work. ## Allow for utility coordination when service changes Where the project changes the utility service, the electrical installation is only part of the sequence. Con Edison’s published process starts with a licensed contractor’s work request. Its service layout then distinguishes utility responsibilities from the customer’s work and identifies the specifications to follow. That coordination can affect both scope and scheduling. Ask who will handle the utility request and what must be complete before connection. Any required inspections need to fit the sequence. A proposed electrician’s work date should not be presented as a guaranteed utility completion date. If the building has a different supply arrangement, the responsible professional needs to establish the applicable process. Do not assume every NYC apartment or house requires the same utility work simply because the quote uses “200 amp.” ## Price the service decision separately Ask for an identifiable description and price for the service work. It should make clear whether associated equipment or changes to the service route are included. Keep restoration responsibilities visible if those changes require additional access. Then compare the combined project with the actual need. Coordinating work can avoid reopening a useful route, but it doesn’t establish a universal saving. If the upgrade will happen later, ask whether the current rewire can accommodate that plan without promising that nothing will need revisiting. You should also know whether the K&T replacement can proceed independently. A service decision should not leave an identified hazardous wiring condition unresolved while unrelated equipment choices drift. ## Make the proposal explain why 200 amps The useful question is not whether 200 amps sounds modern. It is whether that capacity is appropriate for the assessed installation and the loads the project will serve. [Talk to us about the proposed upgrade](https://nycknobandtube.com/contact/) if its connection to the rewire is unclear. Bring the equipment plans and the electrical proposal. The next step is to establish which parts of the work are needed and how they fit together. Is a service upgrade part of your rewiring quote? Tell us what the proposal includes and what new equipment you plan to use. We can discuss the reasons behind the capacity recommendation. [Call about your wiring**(929) 416-1215**](tel:+19294161215) [Get an Estimate↗](https://nycknobandtube.com/contact/#contact-lead) ## Questions that come up ### Does NYC require 200 amps whenever knob and tube is replaced? K&T replacement alone does not establish that requirement. The service must be assessed for the actual installation and intended loads under the applicable code. Ask the electrician to explain the basis for the proposed capacity. ### Will a 200-amp service make the old branch wiring safe? No. Increasing service capacity does not repair damaged insulation or unsuitable connections on existing circuits. Branch wiring and its protection still need to be assessed and corrected as required. ### Can the rewire and service upgrade happen on different schedules? Sometimes, but the electrician must establish a suitable sequence and any dependencies. Utility coordination and building permissions can affect service work. The plan should explain what can be completed safely at each stage.