National Electrical Code Top Ten Tips: Article 514: Motor Fuel Dispensing Facilities

1. Article 514 covers any structure used for storing or dispensing fuel from fixed equipment. It also applies to fuel dispensing facilities for fleets [514.1].
    
2. Article 514 distinguishes between locations handling Class I liquid fuels and those handling three other fuels: compressed natural gas, liquefied natural gas, and liquefied petroleum gas [514.3].
    
3. Table 514.3(B)(1) defines Class I locations for the purposes of Article 514/
    
4. Table 514.3(B)(2) defines electrical equipment classified areas for fuel dispensing.
    
5. Equipment covered by Table 514.3(B)(1) must be wired per Article 501 [514.4].
    
6. Equipment located above equipment covered by Table 514.3(B)(1) must also be wired per Article 501 [514.4], as if it is actually equipment covered by Table 514.3(B)(1) [514.5].
    
7. Install underground wiring in threaded metal conduit, not EMT or PVC [514.8]. Some exceptions apply.
    
8. Provide a listed seal in each conduit (here, we can refer to the raceways as conduit because in this case they are) entering or leaving a dispenser. The sealing fitting must be the first fitting after the conduit emerges from the earth or concrete [514.9(A)].
    
9. In addition to the dispenser seals, provide seals at the horizontal and vertical boundaries of the defined Class I locations  [514.9(B)].
    
10. Ground and bond all metal raceways and metallic objects [514.6], taking care not to confuse grounding with bonding [Article 100]. Grounding and bonding are not interchangeable procedures, and they do not accomplish the same things. If in doubt, bond instead of ground.