You're right, the 2023 NEC significantly changed the definitions regarding storable and permanently installed pools, removing the 42" depth criterion. You're also correct that the NEC doesn't explicitly require equipotential bonding for storable pools. However, the situation of leaving a storable pool up year-round raises a crucial question about intent and potential hazard.Here's a breakdown of the NEC implications and considerations for your situation in Iowa

NEC Definitions and Requirements:
Storable Pools (680.2)

Defined as pools intended to be stored when not in use. The key here is intent.

Permanently Installed Pools (680.2)

All pools that are not storable pools.

Equipotential Bonding (680.26)

Required for permanently installed pools to minimize voltage gradients in the pool area.

Analysis of Your Scenario


The "Intent" Factor

This is the crucial sticking point. The NEC hinges on the intended use. Even if a pool qualifies as "storable" by its physical characteristics, if the owner's intent is to leave it up year-round, a strong argument can be made that it's effectively a permanently installed pool.2.

AHJ Interpretation

Ultimately, the Authority Having Jurisdiction (AHJ) in your area (local electrical inspector) has the final say. They will interpret the NEC and apply it to your specific situation. Contacting your local AHJ and discussing this scenario directly is highly recommended.3.

Safety Considerations

Regardless of the NEC definition, the purpose of equipotential bonding is safety. If the pool is essentially permanent, the risk of electrical hazards is similar to a permanently installed pool.

Arguments for Requiring Equipotential Bonding (even for a "storable" pool left up year-round)



De Facto Permanence

The pool is used as a permanently installed pool, regardless of its original classification. This means the risk of electrical shock is similar to that of a permanently installed pool.

Electrical Equipment

If the "storable" pool has a permanently wired pump, filter, heater, or lighting system, this further blurs the line and strengthens the argument for bonding. Even if those components plug in, but are running 24/7 all year round, it could strengthen the requirement of bonding.

Liability

If an electrical accident occurs at the pool, and it was determined that the pool was used as a permanent structure and not bonded, the homeowner and installer could face significant liability issues.

Arguments Against Requiring Equipotential Bonding (for a "storable" pool)



Strict Interpretation of the NEC

The pool meets the physical definition of "storable" and is not permanently installed. The NEC doesn't explicitly require bonding for storable pools.

Lack of Permanently Wired Equipment

The pool uses only cord-and-plug connected equipment.

Recommendations


Consult with the AHJ

This is the most important step. Explain the situation, show them examples of the pools you're dealing with, and ask for their interpretation. Get their decision in writing if possible.2.

Err on the Side of Safety

If the AHJ is unsure or leaning towards requiring bonding, strongly consider bonding the pool anyway. It's a relatively inexpensive safety measure that can significantly reduce the risk of electrical shock.3.

Document Everything

Keep records of your conversations with the AHJ, photos of the pool installations, and any relevant documentation.4.

Inform Homeowners

Explain the situation to homeowners, including the potential risks and the AHJ's requirements. Give them the option to bond the pool, even if it's not strictly required, for added safety.5.

Consider Local Amendments

Check if your local jurisdiction has amended the NEC regarding pool installations.6.

Bonding Methods

If bonding is required, follow the requirements in NEC 680.26 for equipotential bonding of permanently installed pools. This includes bonding the pool structure, metal parts, reinforcing steel (if present), and any metal within the prescribed distance around the pool.

In summary: While the NEC definitions technically allow for a "storable" pool to be exempt from bonding, the intent of use and the interpretation of the AHJ are paramount. Prioritize safety and consult with the AHJ to ensure compliance and minimize risk. Document everything, and make sure the homeowner is fully informed. Flag for review