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Article 514

    1. Motor Fuel Dispensing Facilities
      Informational Note: Text that is followed by a reference in brackets has been extracted from NFPA 30A-2015, Code for Motor Fuel Dispensing Facilities and Repair Garages. Only editorial changes were made to the extracted text to make it consistent with this Code.image514.1 Scope. This article shall apply to motor fuel dispensing
      image6 m (20 ft)6 m (20 ft)
      Dispensers
      6 m(20 ft)

      6 m(20 ft)Class I, Div. 2 or Class I, Zone 2 Class I, Div. 1 or Class I, Zone 1
      Note: Not to scale.facilities, marine/motor fuel dispensing facilities, motor fuelFIGURE 514.3 Classified Areas Adjacent to Dispensers. [30A: Figure 8.3.2(a)]

      imageimageDispenserStorage tanktop view6 m (20 ft)Class I Division 2 or Class I, Zone 20.5 m (18 in.) highimageDispenserClass I Division 2 orClass I, Zone 2
      0.5 m (18 in.)6 m (20 ft)6 m (20 ft)
      Storage tank side viewDispenser
      Class I Division 2 or Class I, Zone 2
      0.5 m (18 in.)Storage tankend view
      6 m (20 ft) 6 m (20 ft)
      Note: Not to scale.
      FIGURE 514.3(B) Classified Areas Adjacent to Dispenser Mounted on Aboveground Storage Tank. [30A: Figure 8.3.2(b)]
      classifying aboveground tanks. A Class I location shall not extend beyond an unpierced wall, roof, or other solid partition. [30A:8.1, 8.2, 8.3]
    2. Compressed Natural Gas, Liquefied Natural Gas, and Liquefied Petroleum Gas Areas. Table 514.3(B)(2) shall be used to delineate and classify areas where CNG, LNG, compressed or liquefied hydrogen, LP-Gas, or combinations of these, are dispensed as motor vehicle fuels along with Class I or Class II liquids that are also dispensed as motor vehicle fuels. [30A:12.1]Where CNG or LNG dispensers are installed beneath a canopy or enclosure, either the canopy or enclosure shall be designed to prevent accumulation or entrapment of ignitible vapors or all electrical equipment installed beneath the canopy or enclosure shall be suitable for Class I, Division 2 hazardous (classified) locations. [30A:12.4]image(1) At least 3 m (10 ft) from any dispensing device for Class IliquidsDispensing devices for LP-Gas shall be located as follows:
      1. At least 1.5 m (5 ft) from any dispensing device for Class Iliquids where the following conditions exist:
        1. The LP-Gas deliver nozzle and filler valve release no more than 4 cm3 (0.1 oz) of liquid upon disconnec‐ tion.
        2. The fixed maximum liquid level gauge remains closed during the entire refueling process.
      [30A:12.5.2]Informational Note No. 1: Applicable requirements for dispens‐ ing devices for LP-Gas is found in NFPA 58-2014, Liquefied Petro‐ leum Gas Code.Informational Note No. 2: For information on classified areas pertaining to LP-Gas systems other than residential or commer‐ cial, see NFPA 58-2014, Liquefied Petroleum Gas Code, and NFPA 59-2012, Utility LP-Gas Plant Code.Informational Note No. 3: See 514.3(C) for motor fuel dispens‐ ing stations in marinas and boatyards.

      Table 514.3(B)(1) Class I Locations — Motor Fuel Dispensing FacilitiesimageimageLocation Division (Group D) Zone (Group IIA) Extent of Classified Location1 Dispensing Device (exceptOverhead Type) 2, 3Under dispenser containment 1 1 Entire space within and under dispenser pit orcontainmentDispenser 2 2 Within 450 mm (18 in.) of dispenser enclosure or that portion of dispenser enclosure containing liquid- handling components, extending horizontally in all directions and down to grade levelOutdoor 2 2 Up to 450 mm (18 in.) above grade level, extending 6 m (20 ft) horizontally in all directions from dispenser enclosureIndoor
      • with mechanical ventilation 2 2 Up to 450 mm (18 in.) above floor level, extending 6 m(20 ft) horizontally in all directions from dispenser enclosure
      • with gravity ventilation 2 2 Up to 450 mm (18 in.) above floor level, extending 7.5 m
      image(25 ft) horizontally in all directions from dispenser enclosureDispensing Device — Overhead Type4
      imageRemote Pump —
      1. 1 Space within dispenser enclosure and all electrical equipment integral with dispensing hose or nozzle
      2. 2 Within 450 mm (18 in.) of dispenser enclosure, extending horizontally in all directions and down to grade level
      2 2 Up to 450 mm (18 in.) above grade level, extending 6 m (20 ft) horizontally in all directions from a point vertically below edge of dispenser enclosureOutdoor 1 1 Entire space within any pit or box below grade level, any part of which is within 3 m (10 ft) horizontally from any edge of pump2 2 Within 900 mm (3 ft) of any edge of pump, extending horizontally in all directions2 2 Up to 450 mm (18 in.) above grade level, extending 3 m (10 ft) horizontally in all directions from any edge of pumpIndoor11Entire space within any pit
      22Within 1.5 m (5 ft) of any edge of pump, extending in alldirections2 2 Up to 900 mm (3 ft) above floor level, extending 7.5 m (25 ft) horizontally in all directions from any edge of pumpSales, Storage, Rest RoomsunclassifiedunclassifiedExcept as noted belowincluding structures (such as the attendant’s kiosk) on oradjacent to dispensers1
      21
      2Entire volume, if there is any opening to room within the extent of a Division 1 or Zone 1 locationEntire volume, if there is any opening to room within the


      extent of a Division 2 or Zone 2 locationTank, AbovegroundInside tank
      1
      0
      Entire inside volumeShell, ends, roof, dike area11Entire space within dike, where dike height exceedsdistance from tank shell to inside of dike wall for more than 50 percent of tank circumference2 2 Entire space within dike, where dike height does not exceed distance from tank shell to inside of dike wall for more than 50 percent of tank circumferenceVent 2 2 Within 3 m (10 ft) of shell, ends, or roof of tank
      1. 1 Within 1.5 m (5 ft) of open end of vent, extending in all directions
      2. 2 Between 1.5 m and 3 m (5 ft and 10 ft) from open end of vent, extending in all directions
      image(continues)
      Table 514.3(B)(1) Continued
      imageimageInside tank10Entire inside volumeFill Opening11Entire space within any pit or box below grade level, anyLocation Division (Group D) Zone (Group IIA) Extent of Classified Location1 Tank, Underground
      part of which is within a Division 1 or Division 2 classified location or within a Zone 1 or Zone 2 classified location2 2 Up to 450 mm (18 in.) above grade level, extending 1.5 m (5 ft) horizontally in all directions from any tight-fill connection and extending 3 m (10 ft) horizontally in all directions from any loose-fill connectionVent 1 1 Within 1.5 m (5 ft) of open end of vent, extending in all directions2 2 Between 1.5 m and 3 m (5 ft and 10 ft) from open end of vent, extending in all directionsimageVapor Processing SystemPits 1 1 Entire space within any pit or box below grade level, any part of which: (1) is within a Division 1 or Division 2 classified location; (2) is within a Zone 1 or Zone 2 classified location; (3) houses any equipment used to
      transfer or process vaporsEquipment in protective22Entire space within enclosureenclosures


      Equipment not within protective22Within 450 mm (18 in.) of equipment containingenclosure

      flammable vapors or liquid, extending horizontally in all


      directions and down to grade level
      22Up to 450 mm (18 in.) above grade level within 3 m (10 ft)horizontally of the vapor processing equipment
      • Equipment enclosure 1 1 Entire space within enclosure, if flammable vapor or liquidis present under normal operating conditions2 2 Entire space within enclosure, if flammable vapor or liquid is not present under normal operating conditions
      • Vacuum assist blower 2 2 Within 450 mm (18 in.) of blower, extending horizontally
      in all directions and down to grade level2 2 Up to 450 mm (18 in.) above grade level, extending 3 m (10 ft) horizontally in all directionsimageVault 1 1 Entire interior space, if Class I liquids are stored within1For marine application, grade level means the surface of a pier, extending down to water level.2Refer to Figure 514.3(a) and Figure 514.3(b) for an illustration of classified location around dispensing devices.3Area classification inside the dispenser enclosure is covered in UL 87, Standard for Power-Operated Dispensing Devices for Petroleum Products.4Ceiling-mounted hose reel. [30A:Table 8.3.1]
      Table 514.3(B)(2) Electrical Equipment Classified Areas for Dispensing Devices
      image
      Dispensing DeviceExtent of Classified AreaimageClass I, Division 1 Class I, Division 2
      imageCompressed natural gas (CNG) Entire space within the dispenser enclosure 1.5 m (5 ft) in all directions from dispenserenclosureLiquefied natural gas (LNG) Entire space within the dispenser enclosure 3 m (10 ft) in all directions from the dispenserenclosureLiquefied petroleum gas (LP-Gas) Entire space within the dispenser enclosure;450 mm (18 in.) from the exterior surface of the dispenser enclosure to an elevation of 1.22 m (4 ft) above the base of the dispenser; the entire pit or open space beneath the dispenser and within 6 m (20 ft) horizontally from any edge of the dispenser when the pit or trench is not mechanically ventilatedUp to 450 mm (18 in.) above ground and within 6 m (20 ft) horizontally from any edge of the dispenser enclosure, including pits or trenches within this area when provided with adequate mechanical ventilation[30A:Table 12.6.2]
      imageN
    3. Fuel Storage.
      1. Aboveground tanks storing CNG or LNG shall be separated from any adjacent property line that is or can be built upon, any public way, and the nearest important building on the same property. [30A:12.3.1]Informational Note: The relevant distances are given in Section 8.4 of NFPA 52-2013, Vehicular Gaseous Fuel Systems Code.
      2. Aboveground tanks storing hydrogen shall be separa‐ ted from any adjacent property line that is or can be built upon, any public way, and the nearest important building on the same property. [30A:12.3.2]Informational Note: The relevant distances given in NFPA 2-2011, Hydrogen Technologies Code.
      3. Aboveground tanks storing LP-Gas shall be separated from any adjacent property line that is or can be built upon, any public way, and the nearest important building on the same property. [30A:12.3.3]Informational Note: The relevant distances are given in Section 6.3 of NFPA 58-2014, Liquefied Petroleum Gas Code.
      4. Aboveground tanks storing CNG, LNG, or LP-Gas shall be separated from each other by at least 6 m (20 ft) and from dispensing devices that dispense liquid or gaseous motor vehicle fuels by at least 6 m (20 ft). [30A:12.3.3]Exception No. 1: The required separation shall not apply to tanks or dispensers storing or handling fuels of the same chemical composition.Exception No. 2: The required separation shall not apply when both the gaseous fuel storage and dispensing equipment are at least 15 m (50 ft) from any other aboveground motor fuel storage or dispensing equip‐ ment.Informational Note: For further information, see NFPA 52-2013, Vehicular Gaseous Fuel Systems Code, or NFPA 58-2014, Liquefied Petroleum Gas Code, as applicable.
      5. Dispenser Installations Beneath Canopies. Where CNG or LNG dispensers are installed beneath a canopy or enclosure, either the canopy or enclosure shall be designed to prevent accumulation or entrapment of ignitible vapors or all electrical equipment installed beneath the canopy or enclosure shall be suitable for Class I, Division 2 hazardous (classified) locations. [30A:12.4]
      6. Specific Requirements for LP-Gas Dispensing Devices. [30A:12.5] Dispensing devices for LP-Gas shall be located as follows:
        1. At least 3 m (10 ft) from any dispensing device for Class I liquids
        2. At least 1.5 m (5 ft) from any dispensing device for Class I liquids where the following conditions exist:
          1. The LP-Gas deliver nozzle and filler valve release no more than 4 cm3 (0.1 oz) of liquid upon disconnec‐ tion.
          2. The fixed maximum liquid level gauge remains closed during the entire refueling process. [30A:12.5.2]
        Table 514.3(B)(2) shall be used to delineate and classify areas for the purpose of installation of electrical wiring and electrical utilization equipment.
    1. The area 450 mm (18 in.) above the surface of the dock, pier, or wharf and extending 6.0 m (20 ft) horizontally in all directions from the outside edge of the dispenser and down to the water level shall be a Class 1, Division 2 loca‐ tion.
    2. Enclosures such as tubs, voids, pits, vaults, boxes, depres‐ sions, piping chases, or similar spaces where flammable liquids or vapors can accumulate within 6.0 m (20 ft) of the dispenser shall be a Class I, Division 1 location.
  2. Wiring and Equipment Installed in Class I Locations. All electrical equipment and wiring installed in Class I locations as classified in 514.3 shall comply with the applicable provisions of Article 501.

Exception: As permitted in 514.8.

Informational Note: For special requirements for conductor insulation, see 501.20.

  1. Wiring and Equipment Above Class I Locations. Wiring and equipment above the Class I locations as classified in 514.3 shall comply with 511.7.
  2. Underground Wiring. Underground wiring shall be installed in threaded rigid metal conduit or threaded steel intermediate metal conduit. Any portion of electrical wiring that is below the surface of a Class I, Division 1 or a Class I, Division 2 location [as classified in Table 514.3(B)(1) and Table 514.3(B)(2)] shall be sealed within 3.05 m (10 ft) of the point of emergence above grade. Except for listed explosion‐ proof reducers at the conduit seal, there shall be no union, coupling, box, or fitting between the conduit seal and the point of emergence above grade. Refer to Table 300.5.Exception No. 1: Type MI cable shall be permitted where it is installed in accordance with Article 332.Exception No. 2: Type PVC conduit, Type RTRC conduit, and Type HDPE conduit shall be permitted where buried under not less than 600 mm (2 ft) of cover. Where Type PVC conduit, Type RTRC conduit, or Type HDPE conduit is used, threaded rigid metal conduit or threa‐ ded steel intermediate metal conduit shall be used for the last 600 mm (2 ft) of the underground run to emergence or to the point of connection to the aboveground raceway, and an equipment grounding conductor shall be included to provide electrical continuity of the raceway system and for grounding of non–current-carrying metal parts.
  3. Sealing.
  1. At Dispenser. A listed seal shall be provided in each conduit run entering or leaving a dispenser or any cavities or enclosures in direct communication therewith. The sealing fitting or listed explosionproof reducer at the seal shall be the first fitting after the conduit emerges from the earth or concrete.
  2. At Boundary. Additional seals shall be provided in accord‐ ance with 501.15. Sections 501.15(A)(4) and (B)(2) shall apply to horizontal as well as to vertical boundaries of the defined Class I locations.

514.11 Circuit Disconnects.

image

Exception: Intrinsically safe electrical equipment need not meet this

requirement. [30A:6.7]

  1. Emergency Electrical Disconnects. Fuel dispensing systems shall be provided with one or more clearly identified emergency shutoff devices or electrical disconnects. Such devi‐ ces or disconnects shall be installed in approved locations but not less than 6 m (20 ft) or more than 30 m (100 ft) from the fuel dispensing devices that they serve. Emergency shutoff devi‐ ces or electrical disconnects shall disconnect power to all dispensing devices; to all remote pumps serving the dispensing devices; to all associated power, control, and signal circuits; and to all other electrical equipment in the hazardous (classified) locations surrounding the fuel dispensing devices. When more than one emergency shutoff device or electrical disconnect is provided, all devices shall be interconnected. Resetting from an emergency shutoff condition shall require manual intervention and the manner of resetting shall be approved by the authority having jurisdiction. [30A:6.7]
  2. Attended Self-Service Motor Fuel Dispensing Facilities. At attended motor fuel dispensing facilities, the devices or discon‐ nects shall be readily accessible to the attendant. [30A:6.7.1]
  3. Unattended Self-Service Motor Fuel Dispensing Facilities. At unattended motor fuel dispensing facilities, the devices or disconnects shall be readily accessible to patrons and at least one additional device or disconnect shall be readily accessible to each group of dispensing devices on an individual island. [30A:6.7.2]

•

514.13 Provisions for Maintenance and Service of Dispensing

Equipment. Each dispensing device shall be provided with a means to remove all external voltage sources, including power, communications, data, and video circuits and including feed‐ back, during periods of maintenance and service of the dispensing equipment. The location of this means shall be permitted to be other than inside or adjacent to the dispensing device. The means shall be capable of being locked in the open position in accordance with 110.25.

514.16 Grounding and Bonding. All metal raceways, the metal armor or metallic sheath on cables, and all non–current- carrying metal parts of fixed and portable electrical equipment, regardless of voltage, shall be grounded and bonded. Ground‐ ing and bonding in Class I locations shall comply with 501.30.

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