Panels do not usually fail loudly. They get quietly overloaded over thirty years while the house around them adds a heat pump, a second fridge, a microwave, a hot tub and now a car that plugs in. Here is what we look for on a panel upgrade call.
1. You still have a fuse box
Screw-in fuses were fine for a 1950s house with a radio and a toaster. A modern kitchen alone will overwhelm the service. Fuse boxes also invite the classic hack of putting a 30 amp fuse on a 15 amp circuit, which turns the wire in your wall into the fuse.
2. Your service is 60 or 100 amps
Look at the main breaker at the top of the panel. If it reads 60 or 100 and you have central air, electric heat, an EV or a finished basement, you are running at the edge. Most Maryland homes being renovated today go to 200 amps.
3. Breakers trip regularly
Once in a while is a breaker doing its job. Weekly is a message. It usually means an overloaded circuit that needs splitting, and sometimes a failing breaker that no longer holds its rating.
4. Lights dim when the AC or dryer starts
A brief flicker is normal on a big motor start. A visible sag across the whole house every time means the service is undersized or a connection at the panel or meter is loose.
5. You have a Federal Pacific Stab-Lok or Zinsco panel
Both have well documented histories of breakers that fail to trip under fault. If you have one, replace it regardless of how it looks. This is the one case where we do not suggest waiting.
6. There is no space left
Every slot full, or tandem "cheater" breakers doubled up in slots not rated for them. Adding a circuit for a car charger or a generator transfer switch means starting with the panel.
7. Rust, heat marks or a buzzing sound
Discolouration around a breaker, a burnt smell, or a hum you can hear from across the basement are all reasons to stop and call. See our breaker troubleshooting guide.
8. Aluminum branch wiring or knob and tube feeding the panel
If the panel is fed or filled by old wiring, upgrading the box alone does not solve much. That is usually a conversation about rewiring at the same time.
What a panel upgrade costs in Maryland
Most 200 amp upgrades land between $2,200 and $4,500. What moves the number: replacing the meter base, replacing the mast, the length of the service run, how many circuits get rebuilt, and whether grounding and bonding need to be brought current. Sub panels for a garage or addition are usually $900 to $2,000.
Get a flat quote for your address - call (888) 592-6466, or start with your city page such as electrician in Baltimore, electrician in Columbia or electrician in Frederick.