Complete raceway systems of underground PVC can be located less than 5 ft from the inside wall of a pool when space limitations are encountered and shall be buried not less than _____ with at least 4 in. of concrete cover.
a) 6 inches
b) 10 inches
c) 12 inches
d) 18 inches
See answer and applicable Code reference
The correct answer is: a) 6 inches
The installation requirements for swimming pools, fountains, tubs, and spas are listed in Art. 680 of the 2011 NEC. As noted in a portion of 680.10, the minimum cover depth for underground wiring shall be as noted in Table 680.10. As noted in this table, where nonmetallic raceway is placed under a minimum thickness of 4 inches of concrete, the cover depth shall be at least 6 inches.
