Electrical panels and service upgrades: what they are, when to act, and who does what

What does an electrical panel do?

An electrical panel is the metal box that takes the power entering your home and sends it out to separate circuits. Each circuit has a breaker. The breaker shuts that circuit off if it carries too much current. That is the whole job, and it is a safety job.

People use many names for it: breaker box, breaker panel, load center, fuse box. The words overlap, but they are not always the same thing. A load center is the common home version. Inside it, a main breaker cuts power to everything at once, and the circuit breakers each guard one branch.

Think of the panel as a switchboard with a safety valve on every line. When the valve works, a short or an overload stops at the breaker. When it does not work, the heat has nowhere to go but the wiring.

Here is what the parts do in plain words.

Never remove the cover to look. Live parts sit behind it, and a shock can kill. The rest of this guide is about what you can see from outside the panel, and when to call.

What are the signs that my panel needs repair or replacement?

The signs are repeated breaker trips, warm or discolored outlets, flickering or dimming lights, a burning or rubbery smell, and buzzing or heat at the panel itself. NFPA tells people with these signs to call a qualified electrician. Do not wait for the problem to settle by itself.

ESFI reports that electrical distribution systems are the third leading cause of home structure fires. That is why a small, repeated symptom matters. It can be the early part of a larger fault.

Use this table to sort what you see. It is a guide to when to call, not a way to diagnose.

The Consumer Product Safety Commission gives one rule worth repeating. It says to investigate why a fuse blows or a breaker trips, and not to simply replace the fuse or reset the breaker. A trip is a message. Resetting again and again ignores the message.

For a longer list of what to watch for in the whole house, see our guide to electrical warning signs. If you smell smoke, see a flame or hear sizzling, the answer changes: leave the building and call 911 first.

Should I repair the panel or replace it?

Repair fits when one part has failed and the rest of the panel is sound. Replacement fits when the panel is damaged, unsafe by design, out of room, or unable to carry the load you now have. A licensed electrician makes that call after looking at the panel in person.

A fair way to think about it: ask what is failing. A single worn breaker is a part. Burn marks, rust, water damage, a recalled model or no room for new circuits are the panel itself.

We do not guess at this from a photo or a phone call. A licensed electrician has to look at the panel, the wiring that feeds it and the loads on it. For the longer walk-through, read our guide to electrical panel replacement.

Which panels should I take seriously?

Take two older conditions seriously: Federal Pacific Stab-Lok panels and aluminum branch wiring. Both come up often in North Texas homes of a certain age. Neither is a reason to panic. Both are a reason to have a licensed electrician look.

Federal Pacific Stab-Lok. The Consumer Product Safety Commission (CPSC) tested these breakers and confirmed that they fail certain UL calibration test requirements. Those tests check that a breaker holds its rated current and trips within set time limits when a circuit is overloaded. The CPSC also said it closed the matter without a determination on the safety of the breakers. We state both facts because both are true. The manufacturer’s view in that notice was that the breakers trip reliably at most overload levels.

Here is the practical point. A breaker exists to stop a fault. When there is a documented question about whether it does that, many homeowners and inspectors prefer a licensed electrician’s opinion over a guess. Daniel Electric’s own site says that if you have a Federal Pacific breaker panel, the company will remove it to prevent electrical fires. Ask us what we see in your panel.

Aluminum wiring. Some homes built in a certain period have aluminum branch wiring. It needs correct connectors and care at each connection. This is a wiring question, and the panel is only one place where it shows up. See our guide on Federal Pacific panels and aluminum wiring for what an inspection looks at.

What is a service upgrade, and when do I need one?

A service upgrade raises the amount of power your home can draw. It usually means a new panel with a higher rating, and it can include the meter base and the service entrance. You may need one when you add large loads, run out of capacity, or replace a panel that cannot carry today’s demand.

The words can confuse people, so here they are in plain terms.

• Amperage is the size of the electrical current. A panel has an amp rating. Your electrician reads it from the main breaker and the panel label.
• Ampacity is how much current a wire can safely carry. Wire size and the panel rating must fit together.
• A service upgrade changes the main service to a larger size. Common sizes in homes are 100 amp and 200 amp.
• The meter base is the box that holds the utility meter.
• The service entrance is where utility power enters the home.

What makes a house need more capacity? The usual causes are a new EV charger, a hot tub or pool, a kitchen remodel, a new air conditioner, an addition, or a long list of small loads that add up. Your electrician uses a load calculation to see whether the service can carry the new load. That is math done from the code and your actual equipment, not a rule of thumb.

If you are adding an EV charger and want to know whether your panel can take it, read our pillar on EV charger installation.

What does the utility do, and what does the electrician do?

The electrician works on the customer side of the meter. The utility, such as Oncor or CoServ, owns and works on its own lines, meter and service equipment. A panel or service upgrade often needs both, in a set order.

This is where many jobs lose time, so plan for it. A panel swap on your side may need the utility to remove or reconnect power at the meter or the service point. Your electrician can explain which steps apply at your address. Do not touch the meter or the service wires yourself.

Know these facts about who to call:

• To report an outage, Oncor customers can call 888.313.4747, as the City of Grapevine’s page states. For general service requests, Oncor lists 888.313.6862.
• Oncor serves Southlake and Grapevine. Tri-County Electric Cooperative serves parts of the area, such as northwest Grapevine. Check your bill to see who your provider is before you call.
• If you see a downed or sagging line, stay away and call 911 and the utility.

Because these steps have separate owners, ask your electrician at the first visit: who schedules the utility step, who pulls the permit, and what you need to have ready on the day. The answers set the timeline.

Do I need a permit and an inspection?

Plan on a permit for a panel replacement or service upgrade. Cities set their own rules, and they differ. Your licensed electrician normally handles the permit and the inspection. Ask which rule applies at your address and keep the record.

State and city rules sit side by side here. Texas requires a license for non-exempt electrical work. TDLR states that anyone who performs or offers to perform that work must be licensed and must perform it through a licensed electrical contractor. A city can add its own registration and permit steps.

Local examples, with their dates:

• Southlake. The city’s page says it adopted the 2023 National Electrical Code through Ordinance No. 1280 on November 7, 2023. Its inspections page says trade contractors with a current state license must register with the city.
• Grapevine. The city’s permit FAQ lists a simple trade permit for items such as electrical repairs, with same-day turnaround.
• Keller. Check the city’s permit pages for your project. We do not list a Keller rule here, because we want you to read the city’s current text.

Code editions also change. TDLR adopted the 2026 National Electrical Code as the state electrical code, with an effective date of September 1, 2026. Many city pages still list an older edition. When you read a city page that names the 2023 NEC, that is what the page lists. The rule that applies to your job on the day is a question for your electrician and your city’s inspection office. Do not assume a city page is current.

What happens during a panel visit, and what should a written estimate list?

A good visit starts with a look at the panel, the main service and the loads in the house. Then the electrician explains what is wrong, what the options are and what each one covers, in writing. You should be able to compare that estimate with any other.

Daniel Electric states that it gives free quotes on new installations. We do not publish prices on this site, because the right answer depends on your home. Use this list to judge any estimate you get, ours or anyone’s.

1. The scope. Does it say panel replacement, panel repair, subpanel or full service upgrade?
2. The size. What is the amp rating of the new panel and main breaker?
3. The parts. Which panel and breakers, and who supplies them?
4. The permit and inspection. Who pulls them, and is that included?
5. The utility step. Who schedules it, and what do you need to do?
6. The power-off window. How long, and on what day?
7. The repairs outside the panel. Are any wiring or grounding corrections included or excluded?
8. The warranty. What is covered, and where is it written down?

Read the terms on the warranty page before any job, and ask about anything that is unclear. A quote that leaves out the permit or the utility step is not a complete quote. These items also explain why two quotes for the same panel can look different.

Which panel brands do you work with?

Ask us. The common names in homes are Square D, Siemens and Eaton. Whatever the brand, the panel should be listed for use, sized for the load and installed to the adopted code.

Read the label on the outside of the panel door and write down the main breaker rating. Share both when you call. If a recall or known problem model is behind the job, tell us the brand and model at the start. CPSC posts recall notices on its site.

How do panels connect to surge protection and other safety devices?

A panel is the best place to add protection for the whole house. A whole-house surge protective device installs at or near the panel. Arc-fault and ground-fault protection are built into breakers and outlets. These devices work together with the panel and are often handled in the same visit.

This is why a panel project is a good time to review the rest of your protection. See our pillar on surge protection and home safety for what each device does and where it goes.

Ask your electrician about three things when a panel is open to replacement:

• Whether a whole-house surge protective device fits the new panel.
• Whether arc-fault or ground-fault protection applies to the circuits being changed.
• Whether the grounding and bonding at the service match the current code.

These items add scope, so decide them before you sign. Do not add them on the day without a written change.

How do I get started with Daniel Electric?

Daniel Electric is a family owned and operated company in Southlake, with a Texas license, TECL #21005. The company says it has served the area since 1988 and that its electricians are drug and background tested. For a panel or service upgrade, we start with a look at what you have and an estimate in writing.

Have these ready when you call or fill out the quote form:

• The address and the utility that sends your bill.
• A photo of the outside of the panel door and the label, taken with the door closed.
• The symptoms, when they started, and which rooms they affect.
• Any plans that change the load, such as an EV charger, a hot tub, an addition or a new air conditioner.

If the panel is hot, smells of smoke, or you see a flame, do not wait for a quote. Leave the building and call 911.

Next step

To talk about a panel repair, replacement or service upgrade, see our electrical panel repair and replacement page. Call (817) 481-8606 or send the quote form, and have a photo of the panel label ready.