Why You Need to Know Your Panel’s Amperage
Your electrical panel is the hub of your home’s electrical system, powering all the circuits in your house. Knowing how many amps your panel puts out is crucial to make sure your electrical system can handle your household’s energy load. If you’re adding new appliances, upgrading your HVAC or expanding your home, knowing your panel’s amperage will help you determine if an upgrade is needed. Overloading your panel can cause safety hazards like overheating wires, tripped circuit breakers or even electrical fires.
Electrical Panel Amperage
What is Amperage?
Amperage, or “amps,” is the measure of electrical current flowing through your system. Electrical panels are designed to handle a certain amperage, which determines how much electricity can be safely distributed in your home. The amperage rating of your panel determines its ability to support modern electrical needs, appliances, lighting and electronic devices.
Common Electrical Panel Sizes
Most homes have 100 amp, 150 amp or 200 amp panels. Some older homes still have 60 amp panels which are not enough for modern electrical needs. Newer homes especially those with high power appliances may have 400 amp panels. Knowing where your panel falls in this range will help you determine if it’s enough for your household’s power usage.
How to Find Your Electrical Panel’s Amp Rating
There are several ways to find out your electrical panel’s amperage. Whether you’re a homeowner planning an upgrade or a homebuyer evaluating a property, these methods will help you get the information you need.
Check the Main Breaker
The easiest and most accurate way to find your electrical panel’s amperage is to check the main breaker. The main breaker is usually located at the top or bottom of your panel and is the primary disconnect for the entire electrical system. The amperage rating is usually printed on the breaker handle or next to it. For example, if your main breaker is labeled “200A,” that means your panel is 200 amps.
Look for the Manufacturer’s Label
Most electrical panels have a manufacturer’s label inside the panel door or on the panel itself. This label usually has the panel’s maximum amperage rating, manufacturer name, model number and other electrical specs. If the label is intact and legible, you don’t need to check individual breakers to find your panel’s amp rating.
Check the Service Entry Wires
Another way to estimate your panel’s amperage is by checking the service entry wires that connect your panel to the utility meter. These wires come in different sizes depending on the panel’s capacity:
- 60-amp panels have smaller gauge wires.
- 100-amp panels have 4-gauge wires.
- 150-amp and 200-amp panels have larger wires, 2-gauge or bigger. While this can give you an idea, this should only be done by a licensed electrician as handling live wires is very dangerous.
Check the Electrical Meter
Some meters display the amperage rating of the service feeding your home. This won’t always tell you the exact amperage of your panel but will give you an idea of the maximum capacity your home is supplied with. If your home has 200-amp service, for example, your panel should not exceed that.
How to Check Your Electrical Panel’s Amp Rating
Tools You’ll Need
To check your panel’s amperage safely you may need a flashlight, screwdriver and safety gloves. If you plan to go inside the panel, a non-contact voltage tester is also recommended.
How to Read the Main Breaker’s Rating
Find the main breaker inside your panel and look for the amperage rating. This is the maximum capacity of your electrical panel.
Signs Your Electrical Panel is Undersized
If your electrical panel can’t keep up with your home’s energy needs, you may notice:
- Frequent Circuit Breaker Trips: If your breakers trip often, it means your panel is overloaded and can’t handle the load.
- Dim or Flickering Lights: A panel that’s too small for your home can cause voltage fluctuations and lights flicker when you turn on appliances.
- No Available Circuit Slots: If your panel has no empty slots for additional circuits, it’s at max capacity.
- Can’t Run Multiple Appliances: If running multiple appliances at the same time trips breakers or causes power issues, your panel is not enough.
What to Do If Your Panel’s Amp Rating is Too Low
If your current panel is undersized for your home’s needs:
Add a Subpanel
A subpanel is a smaller electrical panel that connects to your main panel. This is a more cost effective solution if you need additional circuits without upgrading the main panel.
Upgrade to a Higher Amp Panel
If your panel is old or inadequate, upgrading to a higher amp panel (e.g. from 100-amp to 200-amp) will ensure your home can handle the increased electrical load safely.
Call a Licensed Electrician
If you’re not sure about your panel’s capacity, call an electrician to get a professional assessment and advice.
Cost to Upgrade Electrical Panel
Costs for Different Amp Upgrades
- 100-amp panel replacement: $1,500-$3,500
- 100-amp panel upgrade: $3,000-$4,500
- 200-amp panel replacement: $3,500-$5,000
- 200-amp panel upgrade: $2,500-$4,500
What Affects the Cost
- Panel brand and quality
- Labor costs in your area
- Permits and inspections required
- Complexity of installation
DIY vs Hiring a Pro: Which is Better?
Risks of DIY Electrical Work
Working with electrical panels requires expertise. Mistakes can cause electrical fires, code violations or severe injury.
Why Hire a Licensed Electrician
A pro will make sure your panel is installed safely, meets code and can handle future electrical loads.
Conclusion: Your Electrical System is Big Enough for Your Home
Knowing your panel’s amp rating is key to a safe and efficient home. Now that you know how to read your panel’s capacity and the signs of an overloaded system, you can be sure your electrical setup is sufficient for your needs. If you’re not sure about your panel size or need an upgrade, call a licensed electrician to help you out. If you are looking to get a price estimate, go to our online price estimator today!
