CPI Electrical Bonding & GFCI Requirements 2

Question 1

What is the minimum size copper conductor required for equipotential bonding of a swimming pool structure per NEC Article 680?

Accepted Answer

#8 AWG solid copper

Answer

NEC 680.26 requires a solid #8 AWG copper conductor for the equipotential bonding grid of swimming pools.

Question 2

A pool inspector finds a metal pool ladder that is not connected to the equipotential bonding grid. Which hazard does this primarily create?

Accepted Answer

Voltage gradient between the ladder and pool water

Answer

An unbonded metal ladder can develop a voltage potential difference relative to the water, creating a shock hazard for swimmers.

Question 3

Under NEC 680.22(A), GFCI protection is required for all 120V receptacles located within how many feet of the inside wall of a swimming pool?

Accepted Answer

20 feet

Answer

NEC 680.22(A) requires GFCI protection for all 120V, 15A and 20A receptacles within 20 feet of the pool's inside wall.

Question 4

Which of the following pool components is NOT required to be included in the equipotential bonding grid?

Accepted Answer

Pool heater plastic PVC piping

Answer

Non-conductive plastic/PVC piping does not conduct electricity and therefore does not need to be bonded.

Question 5

A GFCI device trips at what maximum ground fault current level to protect people from electrocution?

Accepted Answer

5 milliamps

Answer

Standard personnel protection GFCIs are designed to trip at 4–6 milliamps (typically rated at 5 mA) to interrupt potentially lethal ground faults.

(CPI) Certified Pool & Spa Inspector Practice Test