Pool Bonding and Grounding Myths Sarasota Homeowners Should Clear Up Before Inspection | CoHarbor Electric

A homeowner in Nokomis called us a few weeks before listing his house. He’d read that pool bonding comes up a lot on inspections, so he wanted to get ahead of it, which we appreciated. Then he told us he’d already “fixed” it.

A few years back, his pool service tech had mentioned the bonding looked iffy. So a friend who was handy with wiring ran a long copper wire from the pool pump, along the side of the house, into the garage, and landed it on the neutral bar of a subpanel in there. The thinking was simple. Tie the pool back to the house electrical system and it’ll be extra safe.

It was the opposite. That subpanel’s neutral carries current every time something in the garage runs, and now some of that current had a path out to the pool equipment. We disconnected it, traced the original bonding at the pad, found where it had actually broken, and repaired it properly. When the buyer’s inspector came through a month later, the bonding passed without comment.

He wasn’t careless. He was working from a myth, and it’s one of several we run into around Sarasota all the time. So before your pool gets looked at, whether it’s for a sale, a 4-point, or a permitted equipment swap, here are the ones worth clearing up.

First, the Two-Sentence Version

Grounding gives fault current a path back to your panel so a breaker trips when something goes wrong. Bonding ties all the metal and water around the pool together so nothing sits at a different voltage than anything else.

That’s really it. We’ve gone deeper on how inspectors check both in our guide to what fails pool bonding inspections in older Sarasota waterfront homes, so we won’t repeat all of it here. What we want to talk about is what happens when people mix the two up.

Myth: “Run the Bonding Wire Back to the Panel to Make It Safer”

This is the Nokomis situation, and it comes from a reasonable instinct. The panel is where all the safety stuff lives, so connecting the pool to it feels like a good idea.

Here’s the thing. NEC Article 680, specifically section 680.26, describes the pool’s equipotential bonding grid as a local system. It’s specifically not required to be extended back to the service panel, the grounding electrode, or anything else. The goal is for everything around the pool to sit at the same potential. It doesn’t need to match the house.

Your pool equipment is already connected back to the panel through its equipment grounding conductors. That part’s handled. Adding an extra long wire from the bonding grid back into the house doesn’t add protection. At best it does nothing. At worst, like when it’s landed on a neutral in a subpanel, it puts current on the bonding system that has no business being there.

A Word About Voltage From the Street

There’s another reason we don’t love extra connections. On some properties, a small amount of voltage can show up on the grounding system from the utility side, from neutral current coming back through the ground. It’s usually minor, but it’s real, and around a pool it matters. A well-built local bonding grid keeps the pool area at one potential even if that happens. If we ever suspect voltage is coming in from the utility, that’s a conversation we’d bring FPL into, since their equipment ends at your meter.

Myth: “Just Drive a Ground Rod at the Pool Pad”

We’ve written before about the myth that a ground rod stops lightning. Our piece on common lightning myths that put Sarasota homes at risk covers that one. This is a different myth with the same hardware. Here the idea is that a rod next to the pump will “ground” the pool equipment and make it safe.

It won’t. The earth is a surprisingly poor conductor for clearing faults. A ground rod can easily have 25 ohms or more of resistance to the soil, and in Sarasota’s sandy ground during the dry months, often more. At 120 volts, that allows around five amps to flow. A 20-amp breaker won’t even notice. So if a pump motor faulted to its housing and the rod was the only path, that housing could stay live.

NEC 250.4 is clear that the earth can’t serve as the effective fault-current path. That’s the job of the equipment grounding conductor running back to the panel. A rod doesn’t create a bond, either, unless it’s tied into the grid, and even then it’s not doing what the grid wasn’t already supposed to do.

When we find a mystery rod at a Sarasota pool pad, it almost always means someone was trying to solve a real problem with the wrong tool. The real problem is still there. We go find it.

Myth: “The Equipment’s Grounded, So the Pool’s Bonded”

A lot of pool owners hear “the pump is grounded” from a service tech and take it to mean the whole system is fine. Or they plug a three-light tester into the lanai outlet, see the right lights, and figure they’re good.

Those checks tell you about grounding on one circuit. They tell you nothing about bonding. The pump can be perfectly grounded back to the panel while its bonding lug is bare, the heater’s never been tied in, and the handrail anchors have corroded loose. Bonding gets checked separately, with a meter, point by point. A fair amount of it is under concrete or pavers where nobody can see it.

Myth: “The Screen Cage Doesn’t Count”

This one’s very Sarasota. Almost every pool here sits inside an aluminum screen enclosure, and most people think of the cage as a structure, not part of the electrical system.

But Article 680 generally requires fixed metal within five feet horizontally of the pool’s inside wall to be bonded. On a lot of Sarasota pools, the cage’s frame and posts land right inside that distance. Depending on the layout, the enclosure may need to be tied into the bonding grid.

We saw this at a home in Venice Gardens where the owners had replaced an old, storm-damaged cage with a new one. The new enclosure was installed nicely, and nobody had reconnected the bonding to it. The old cage had been bonded. The new one was just sitting there. It’s an easy miss, because the cage contractor isn’t thinking about Article 680 and the pool electrician wasn’t called.

If you’ve replaced a screen enclosure since you bought the house, especially after one of the last few hurricane seasons, it’s worth asking whether the bonding went back on.

Myth: “Our Salt Pool Has a Zinc Anode, So That Covers It”

Saltwater pools are everywhere in Sarasota, and a lot of owners have added a sacrificial zinc anode to protect the heater, ladder, and light fixtures from corrosion. Good idea. Salt water is hard on metal.

But a zinc anode is a corrosion tool, not a bonding system. It works by corroding in place of your more valuable metal parts. It doesn’t hold the pool at one electrical potential, and it doesn’t satisfy the bonding requirements in Article 680. Most anodes actually need to be connected to the bonding grid to work properly.

Salt systems also give us another reason to check bonding more often. At a home in Glen Oaks Estates, the salt cell had been running for about eight years, and the bonding clamps at the equipment pad had turned to green crust. Salt water splashing and dripping onto bare copper and brass eats connections fast. Nothing had failed dramatically. It just wasn’t a reliable connection anymore. We replaced the clamps and lugs with corrosion-resistant hardware, and we check them every time we’re out.

Myth: “It’s Grandfathered, So Nobody Can Make Us Touch It”

Partly true, which is why it sticks around.

An older pool built to the code of its day isn’t automatically in violation just because the code has changed since. But “grandfathered” usually lasts only until someone touches it. Replace a pump, add a heater, swap the light, or redo the deck under a Sarasota County permit, and the work being done has to meet current requirements. That often includes the bonding connections tied to that equipment.

And on a sale, an inspector isn’t enforcing code the way a building official does. They’re reporting what they see. A bonding gap on a 1990s pool can still end up on the report, and the buyer is going to ask about it either way.

How These Myths Show Up on Inspection Day

Most of what we fix before a Sarasota inspection traces back to one of the ideas above. The patterns look something like this:

• An extra wire running from the pool into the house panel, sometimes onto a neutral
• A ground rod at the pad, clamped to equipment, with the actual bonding broken nearby
• New equipment, a new cage, or new pavers with no bonding reconnection
• Corroded clamps on salt pools that haven’t been touched in years
• A zinc anode sitting in the skimmer with no bond at all

None of these are hard to fix once someone’s actually looking. The trouble is that none of them are visible from a lawn chair, and most of them look like somebody already took care of it.

What We Check Before Your Inspection

When we come out ahead of an inspection, we check that each piece of pool equipment is properly grounded back to the panel. Then we separately test bonding continuity across the pump, heater, salt cell, lights, handrails, ladders, the screen enclosure where it’s close enough, and the water bonding point. We look at every clamp and lug we can reach for corrosion, and we note anything that looks like a workaround, including rods and extra wires.

We’ll be honest about the limits. Some of the grid is buried, and testing from accessible points can only tell us so much. If a result points to a break under the deck, we’ll explain what it’d take to find it and let you decide how to handle it before listing.

Get Your Sarasota Pool Ready With Coharbor Electric

If you’ve got an inspection coming up, or you just aren’t sure whether someone’s “fix” on your pool actually fixed anything, it’s worth having it checked by someone who’s looking specifically at Article 680. Coharbor Electric is licensed and insured, and we handle pool bonding testing, grounding corrections, cage and equipment bonding, and permitted repairs throughout Sarasota County, from Nokomis and Venice Gardens to Glen Oaks Estates and the neighborhoods in between.

We can’t promise your pool comes through an inspection with zero notes. We can promise a straight answer about what’s really going on at the pad, and repairs done the right way. Give Coharbor Electric a call and we’ll get your pool looked at before the inspector does.