15.) Swimming Pool filter motors with attached cords that contain an equipment grounding conductor smaller than 12 AWG.
The cord that is typically supplied (as attached to filter pump motors) by pool companies does not always contain a correctly sized equipment grounding conductor. The cord could be designed "for use as testing purpose only." Section 680.21(A) Wiring Methods
(1) General. "Any wiring method employed to supply a pool-associated motor shall contain a copper equipment grounding conductor sized in accordance with 250.122 but not smaller than 12 AWG."
(5) Cord-and-Plug Connections. "The flexible cord shall include an equipment grounding conductor sized in accordance with 250.122 and shall terminate in a grounding-type attachment plug."