How to Upgrade a Home Electrical Panel
If your panel is full, tripping, or still wears a Federal Pacific or Zinsco label, you are not really asking how to upgrade an electrical panel. You are asking whether your house can safely run what your family already plugs into it. This guide walks through how a panel upgrade actually happens in South Jersey, written by the people who do them: a NJ-licensed Master Electrician is on every job, the price is flat-rate and quoted upfront before any work starts, and the utility cut and municipal inspection are handled for you. When you are ready to schedule the work itself, our Electrical Panel & Service Upgrades service page is where you book the on-site quote.
A panel upgrade is not a weekend project, and the parts a homeowner can see (the gray box on the wall) are the smallest piece of it. The real work sits at the meter pan, the weatherhead, the grounding electrode system, and the coordination with your utility, JCP&L, PSE&G, or Atlantic City Electric depending on which town you are in. Get those four things right and the panel inside the house is the easy part. Get them wrong and the inspector fails it, the utility refuses the reconnect, or the home is left with a grounding fault nobody catches until something goes wrong. That is why this is permit-and-inspection work, not a swap.
We replace legacy panels across Burlington, Camden, and Mercer Counties every week, and the pattern is consistent: most 1950s through 1980s homes in Cherry Hill, Mount Laurel, Willingboro, and Mount Holly were built around a 100A service that is now stretched thin by central air, an EV charger, a hot tub, or a finished basement. The question is rarely whether to upgrade. It is what size to upgrade to, and how to schedule the utility disconnect so the house is without power for as little time as possible.
100A vs 200A vs 400A: Sizing Your New Service
Service size is set by a load calculation against what the house actually runs, not by a round number that sounds safe. A 100A service was standard for decades and still works for a small home with gas heat, gas range, and no large added loads. The moment you add central air, electric heat, an EV charger, a hot tub, or a kitchen full of modern appliances, 100A runs out of headroom and the panel fills up. For the overwhelming majority of South Jersey single-family homes we upgrade, a 200A service is the right answer: it covers today's loads, leaves room for an EV charger or heat pump later, and keeps the breaker count comfortable. A 400A service is for large homes, homes with a workshop or pool plus EV plus electric heat, or properties with a separate structure on the same meter. We run the load calc on site so you pay for the service you need, not the biggest one on the shelf. The panels we install are Square D QO, Siemens, or Eaton CH, all with a copper bus, and we never add aluminum branch wiring to a new panel.
What a Panel Upgrade Actually Involves
The visible panel is one of five parts that change. A full service upgrade replaces the meter pan that holds the utility meter, the weatherhead or the underground service entrance where power enters the home, the service-entrance conductors, the panel and breakers themselves, and the grounding electrode system that ties the whole thing to ground rods and the water main bond. On most older homes the grounding is the piece that is out of date, and bringing it to current code is a real part of the job rather than an upsell. We pull the permit, schedule the utility disconnect, do the changeover, and then coordinate the municipal final inspection before the meter goes back in. For a typical residential 200A upgrade the home is usually back on power the same business day, with the disconnect-and-reconnect window arranged ahead of time so you are not guessing when the lights come back. Ready to put real numbers to your house? Our Electrical Panel & Service Upgrades page is the place to request the on-site flat-rate quote.
Permits, the Utility Cut, and the Municipal Inspection
A panel upgrade in New Jersey is permitted work, and any electrician offering to do it with no permit or no inspection is offering to leave you with an unpermitted service that can derail a future home sale and void coverage if something fails. Here is how the sequence runs. We pull the electrical permit with the local construction office. We schedule the disconnect with your utility: JCP&L in Southampton, Medford, Marlton, Moorestown, Mount Laurel, Willingboro, and Mount Holly; PSE&G, filed through PSE&G Construction Services with a four-hour window, in Cherry Hill, Haddonfield, and Trenton; or Atlantic City Electric where that is the serving utility. We complete the changeover with the power cut. Then the local municipal inspector signs off, and only after that does the utility reset the meter and restore power. The whole chain exists to protect the homeowner, and we handle every step of it so you do not have to chase the utility or the township.
Why This Page, Then the Service Page
This guide is here to answer the how-to question honestly so you can tell good work from a rushed swap. When you have decided to move forward, the next step is a real on-site load calculation and a flat-rate quote, never an hourly meter running while someone figures it out. That happens on our Electrical Panel & Service Upgrades service page, where you can request the in-home estimate, or you can call us directly to talk it through. We are a family-owned shop of NJ Master Electricians, BBB A+ rated, serving Burlington, Camden, and Mercer Counties since 2011, and License #17216 is on every permit we pull.
Highlights
• Breakers that trip repeatedly, or a panel where every slot is already full and there is no room to add a circuit.
• A Federal Pacific Stab-Lok or Zinsco panel, both known to fail to trip under fault and routinely replaced on sight.
• A 100A (or smaller) service when you want to add central air, an EV charger, a hot tub, or electric heat.
• Warm or discolored breakers, a burning smell at the panel, or a panel that buzzes or feels hot to the touch.
• Lights that dim or flicker across multiple rooms when a large appliance kicks on, which can signal an overloaded or undersized service.
• Fuses instead of breakers, or any aluminum branch wiring feeding the panel, both common in older South Jersey housing stock.
• A scorched, rusted, or water-stained meter pan or weatherhead, often the aftermath of a summer-storm surge that fried the meter socket.
Frequently Asked Questions
How long does a home electrical panel upgrade take?
For a typical residential 200A service upgrade, the home is usually back on power the same business day. We arrange the utility disconnect-and-reconnect window ahead of time, so the actual time without power is a planned window rather than an open-ended outage. Larger 400A jobs or upgrades that involve relocating the meter or service entrance can run longer, which is why we set the timeline at the on-site quote.
Do I need a permit and inspection to upgrade my panel in New Jersey?
Yes. A panel or service upgrade is permitted work in New Jersey. We pull the electrical permit with the local construction office, and the municipal inspector signs off after the changeover. Only then does the utility reset the meter. Anyone offering a 'no permit, no inspection' panel job is leaving you with an unpermitted service that can complicate a home sale and create real liability. We handle the permit and the inspection as part of the job.
What size panel do I need: 100A, 200A, or 400A?
It depends on a load calculation against what your home actually runs. 100A still works for a small home with gas heat and no large added loads. For most South Jersey single-family homes, especially anyone adding central air, an EV charger, a hot tub, or electric heat, 200A is the right size and leaves room to grow. A 400A service is for large homes or properties with a workshop, pool, or separate structure on the same meter. We run the load calc on site so you upgrade to the service you need.
Should I replace a Federal Pacific or Zinsco panel even if it still works?
Yes. Federal Pacific Stab-Lok and Zinsco panels are known to fail to trip under a fault, which defeats the entire purpose of a breaker. They are among the most common panels we replace across Burlington, Camden, and Mercer Counties. 'It still works' is exactly the problem: the danger shows up only at the moment the breaker is supposed to protect you and does not.
Which brand of panel do you install?
We install Square D QO, Siemens, or Eaton CH panels, all with a copper bus. We do not mix brands inside a panel, and we do not add aluminum branch wiring to a new panel. Standardizing on these three means correct breaker fit, available parts down the road, and a panel that meets current code.
Will the power be off the whole day during the upgrade?
No. The utility disconnect is a scheduled window, not an all-day outage. For JCP&L towns we schedule the cut, and for PSE&G towns the disconnect runs through PSE&G Construction Services on a four-hour window. We do the changeover during that window, the inspector signs off, and the utility resets the meter. We plan the timing with you up front so you know what to expect.
About DK Electrical Solutions
If this blog resource was useful, the same Master-Electrician-led team behind it handles real installations and repairs across South Jersey every day. Since 2011 our crews have served Burlington, Camden, Mercer and Ocean counties under New Jersey Electrical Contractor License #17216 — which means a Master Electrician of record signs off every panel swap, EV charger circuit, generator hookup, and rewire we complete.
We focus on the work behind the cover plate: torque-marked lugs, neatly labeled panels, code-correct grounding and bonding, and permits pulled with the local construction office so the inspector signs the card before we leave. Pricing is flat-rate and itemized in writing — no hourly billing, no surprise add-ons, and a written workmanship warranty on every installation.
Towns we serve weekly include Willingboro, NJ · Southampton, NJ · Medford, NJ · Marlton, NJ · Moorestown, NJ · Mt. Laurel, NJ. If you'd like a real on-site estimate, call (609) 796-4177 or browse our full electrical services catalog and all the South Jersey towns we cover. New homeowners often start with our panel upgrade, whole-house generator, or EV charger installation pages.