Is a Whole-Home Surge Protector Worth It in Arizona?
From Solana Electrical, AZ ROC #341966
The short answer
For many Arizona homes, yes. A whole-home surge protector mounts at the electrical panel and limits voltage spikes before they reach your appliances, AC and electronics. It does not stop a direct lightning strike, and it works best paired with good plug-in surge strips. Newer code calls for one when a home’s service equipment is replaced.
What a surge is
A surge is a short spike in voltage, far above the normal level. Some come from outside the home, such as lightning nearby or switching on the utility lines. Many come from inside, when large motors in an AC unit, a pool pump or a refrigerator turn on and off.
Big surges can damage equipment at once. Small, repeated surges can wear down the electronics in appliances over time.
What a whole-home surge protector does
A whole-home surge protector, also called a surge protective device or SPD, is installed at or next to your electrical panel. When voltage spikes, it diverts the extra energy to ground before it spreads through the house. It protects every circuit at once, including things you cannot plug into a power strip, like the AC, the range, the water heater and the pool equipment.
What it does not do
It does not make a home safe from a direct lightning strike.
It does not replace good grounding. It needs a sound ground to work.
It does not protect phone, cable or internet lines unless those are also protected.
It is not a backup power source. It does nothing during an outage.
Why it matters in the West Valley
Monsoon season brings lightning and storm-related power problems to the Phoenix area. Homes here also run large motor loads for much of the year, mainly air conditioning and pool pumps. Modern AC systems, appliances and medical equipment all rely on circuit boards that are sensitive to voltage spikes.
For a home with a newer AC system, a pool or spa, or someone who relies on powered medical equipment, a whole-home device is a sensible layer of protection.
Two layers work best
Think of surge protection in two layers. The whole-home device at the panel handles large surges from outside and protects hard-wired equipment. Plug-in surge strips at your TV, computer and other electronics handle the smaller surges that start inside the home and give a second line of defense for sensitive devices.
A plain power strip is not a surge protector. Look for one that is labeled as a surge protector and carries a UL listing.
What the code says
Starting with the 2020 edition, the National Electrical Code calls for a surge protective device on services that supply homes, including when service equipment is replaced. Which code edition applies depends on your city or county building department. If you are planning a panel upgrade, ask about adding surge protection at the same time.
Is it worth it for you?
Ask yourself a few questions. Do you have a newer AC system or heat pump? A pool, spa or well pump? Expensive electronics, smart appliances or medical equipment? Have you lost an appliance or electronics after a storm? If you answered yes to any of these, a whole-home surge protector is worth a conversation.
It is installed at the panel, so it should be done by a licensed electrician. Do not open the panel yourself.
Talk it through with us
Call (602) 999-2770 and a real person answers. We will look at your panel and tell you plainly whether surge protection makes sense for your home. You will hear the price before we start, and our work carries a two-year warranty on labor and material.
A surge protector is not a fix for a panel that is hot, buzzing or smells like burning. Call an electrician for those, and call 911 for smoke or fire.
Common questions
Does a whole-home surge protector replace power strips?
No. It handles large surges at the panel. Plug-in surge protectors still help with smaller surges at sensitive electronics. The two work best together.
Will it protect against lightning?
It helps with surges from nearby lightning and utility lines. No device can promise protection from a direct strike.
Is a surge protector required when I replace my panel?
Newer editions of the National Electrical Code call for one when service equipment is replaced. Your local building department decides which edition applies.
