Pool Shell, Perimeter and Equipment Bonding Inspections for Austin Pools and a Splash Pad (2018-2026)

Pool bonding is meant to keep everything a swimmer can touch at the same voltage, and most of it is buried in the deck before anyone checks it. Pool builders, electricians and homeowners around Austin have asked us for pool bonding inspections since 2018, roughly 55 times through 2026.

Three tests

Continuity comes first. With a ground tester on its two-pole AC resistance setting, we measure from the pool ground to each side of the bonding halo, to the shell, to pumps, timers and panels, and subtract the resistance of the test leads. On a sound installation those readings are hundredths of an ohm. Then a three-pole fall-of-potential test gives the resistance of the pool grounding to remote earth, and a tone on the shell rebar, sent from the house ground, confirms the steel is bonded all the way around. The perimeter surface counts out to 3 feet from the inside wall of the pool, under NEC^® 680.26(B)(2), so the bonding conductor has to be in that band. On one passing pool it sat 18 to 24 inches from the wall. The earliest reports also covered GFCI tests and the burial depth of pool circuits.

What failed

We reread thirteen reports. Five passed every item, and eight failed at least one. The failures were concrete and fixable. The halo was not connected to the shell rebar pigtails, or did not run all the way around, or had been cut on one side. A water bond could not be found. Metal landscaping barriers, a fence gate that swings over the deck, and the rebar of a patio and its steps had not been bonded. A pool light and a pump were not on GFCI protection, receptacles and accent lights sat too close to the water, and conduit runs had more than 360 degrees of bends between pull points. In three cases the shell steel could not be reached for testing, and the task was to chip or bore out the concrete at several points so the rebar could be tested.

A commercial splash pad

In 2022 we inspected a new splash pad added beside an existing commercial pool. The halo read about 0.1 ohm to the pool halo on three sides, the steel structures 0.3 to 0.4 ohm, and the pumps, timer and panel 1.0 to 1.5 ohms. A well coated fence read 5 ohms with its coating scraped back, which we accepted given the long path to its ground. Every item passed.

Related services

Pool and spa bonding checks are listed with our residential inspections.