NEC Swimming Pool and Spa Practice Questions

These NEC swimming pool practice questions cover Article 680 — clearances, equipotential bonding, GFCI and underwater luminaires. Article 680 comes up far more often than the amount of pool work most of us actually do, and there is a good reason for that: it is life safety, and the numbers are specific enough to write clean exam questions around. Clearances, the equipotential bonding grid, and where GFCI protection is required are the three areas worth knowing cold.

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Written by Kevin, a licensed Michigan master electrician — 26 years in the trade and 17 of them as an electrical inspector. Every answer below names the NEC section it comes from, so you learn where to look it up rather than memorising it.

Exam tipMost pool questions are a distance or a wire size. The 5 ft, 10 ft and 25 ft measurements and the 8 AWG solid copper bonding conductor cover a large share of them.

Tap an answer to see whether you got it right, the code section it comes from, and the reasoning worked out in full. Nothing to sign up for.

Question 1Pools

A receptacle powering a swimming-pool recirculation pump (GFCI-protected) must be at least how far from the inside pool wall?

Question 2Pools

A switching device must be at least _______ ft from the inside wall of a pool unless separated by a solid barrier or other permanent partition.

Question 3Pools

A pool convenience receptacle outlet shall be located within what distance range of the pool edge?

Question 4Pools

What size shall the equipotential bonding wire size be?

Question 5Pools

A metal fence shall be bonded how far from the pool edge?

Question 6Pools

What wiring method can a pool wet-niche fixture be installed in?

Question 7Pools

Wet-niche light shall be how far under water?

Question 8Pools

For a wet-niche fixture junction box, what is the minimum mounting height required?

Question 9Pools

Underground wiring is not allowed under a pool or within how many feet, measured horizontally, from the inside wall of the pool?

Question 10Pools

A receptacle providing power for pool pumps and water circulation must be how many feet or more from the inside wall of the pool?

These are 10 of 803 questions

The full course carries 654 code and calculation questions plus 149 photo questions taken on real job sites — my own photographs from 17 years of electrical inspections. Every one of them is worked out like the ones above.

NEC 2023 and NEC 2026 both included, switch between them any time
Every question names the code section, so you learn to find it in the book
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NEC Swimming Pool and Spa Practice Questions

A receptacle powering a swimming-pool recirculation pump (GFCI-protected) must be at least how far from the inside pool wall?

A switching device must be at least _______ ft from the inside wall of a pool unless separated by a solid barrier or other permanent partition.

A pool convenience receptacle outlet shall be located within what distance range of the pool edge?

What size shall the equipotential bonding wire size be?

A metal fence shall be bonded how far from the pool edge?

What wiring method can a pool wet-niche fixture be installed in?

Wet-niche light shall be how far under water?

For a wet-niche fixture junction box, what is the minimum mounting height required?

Underground wiring is not allowed under a pool or within how many feet, measured horizontally, from the inside wall of the pool?

A receptacle providing power for pool pumps and water circulation must be how many feet or more from the inside wall of the pool?

These are 10 of 803 questions

More free practice questions by topic