WAC 296-307-41047. Electrical requirements that apply to LP-gas installations

(1) Electrical equipment and wiring must be specified by and installed according to chapter 296-307 WAC Part T, for ordinary locations. (2) Fixed electrical equipment and wiring installed within classified areas must comply with Table U-5 and must be installed according to chapter 296-307 WAC Part T. Exception: This provision does not apply to fixed electrical equipment at residential or commercial installations of LP-gas systems, LP-gas used as a motor fuel, or to LP-gas system installations on commercial vehicles. TABLE U-5 Part Location Extent of classified area 1 Equipment must be suitable for Class I, Group D 2 A Storage containers other than DOT cylinders Within 15 feet in all directions from connections, except connections otherwise covered in this table Division 2 B Tank vehicle and tank car loading and unloading 3 Within 5 feet in all directions from connections regularly made or disconnected for product transfer Division 1 Beyond 5 feet but within 15 feet in all directions from a point where connections are regularly made or disconnected and within the cylindrical volume between the horizontal equator of the sphere and grade (See Figure H-1) Division 2 C Gauge vent openings other than those on DOT cylinders Within 5 feet in all directions from point of discharge Division 1 Beyond 5 feet but within 15 feet in all directions from point of discharge Division 2 D Relief valve discharge other than those on DOT cylinders Within direct path of discharge Division 1 Note : Fixed electrical equipment should not be installed Within 5 feet in all directions from point of discharge Division 1 Beyond 5 feet but within 15 feet in all directions from point of discharge except within the direct path of discharge Division 2 E Pumps, compressors, gas-air mixers and vaporizers other than direct fired Indoors without ventilation Entire room and any adjacent room not separated by a gastight partition Division 1 Within 15 feet of the exterior side of any exterior wall or roof that is not vaportight or within 15 feet of any exterior opening Division 2 Indoors with adequate ventilation 4 Entire room and any adjacent room not separated by a gastight partition Division 2 Outdoors in open air at or above grade Within 15 feet in all directions from this equipment and within the cylindrical volume between the horizontal equator of the sphere and grade (See Figure H-1) Division 2 F Service station dispensing units Entire space within dispenser enclosure, and 18 inches horizontally from enclosure exterior up to an elevation 4 ft. above dispenser base. Entire pit or open space beneath dispenser Division 1 Up to 18 inches above grade within 20 ft. horizontally from any edge of enclosure Division 2 Note : For pits within this area, see Part F of this table G Pits or trenches containing or located beneath LP-gas valves, pumps, compressors, regulators, and similar equipment Without mechanical ventilation Entire pit or trench Division 1 Entire room and any adjacent room not separated by a gastight partition Division 2 Within 15 feet in all directions from pit or trench when located outdoors Division 2 With adequate mechanical ventilation Entire pit or trench Division 2 Entire room and any adjacent room not separated by a gastight partition Division 2 Within 15 feet in all directions from pit or trench when located outdoors Division 2 H Special buildings or rooms for storage of portable containers Entire room Division 2 I Pipelines and connections containing operational bleeds, drips, vents or drains Within 5 ft. in all directions from point of discharge Division 1 Beyond 5 ft. from point of discharge, same as Part E of this table J Container filling Indoors without ventilation Entire room Division 1 Indoors with adequate ventilation 4 Within 5 feet in all directions from connections regularly made or disconnected for product transfer Division 1 Beyond 5 feet and entire room Division 2 Outdoors in open air Within 5 feet in all directions from connections regularly made or disconnected for product transfer Division 1 Beyond 5 feet but within 15 feet in all directions from a point where connections are regularly made or disconnected and within the cylindrical volume between the horizontal equator of the sphere and grade (See Fig. H-1.) Division 2 Part Location Extent of classified area 1 Equipment must be suitable for Class I, Group D 2 A Storage containers other than DOT cylinders Within 15 feet in all directions from connections, except connections otherwise covered in this table Division 2 B Tank vehicle and tank car loading and unloading 3 Within 5 feet in all directions from connections regularly made or disconnected for product transfer Division 1 Beyond 5 feet but within 15 feet in all directions from a point where connections are regularly made or disconnected and within the cylindrical volume between the horizontal equator of the sphere and grade (See Figure H-1) Division 2 C Gauge vent openings other than those on DOT cylinders Within 5 feet in all directions from point of discharge Division 1 Beyond 5 feet but within 15 feet in all directions from point of discharge Division 2 D Relief valve discharge other than those on DOT cylinders Within direct path of discharge Division 1 Note : Fixed electrical equipment should not be installed Within 5 feet in all directions from point of discharge Division 1 Beyond 5 feet but within 15 feet in all directions from point of discharge except within the direct path of discharge Division 2 E Pumps, compressors, gas-air mixers and vaporizers other than direct fired Indoors without ventilation Entire room and any adjacent room not separated by a gastight partition Division 1 Within 15 feet of the exterior side of any exterior wall or roof that is not vaportight or within 15 feet of any exterior opening Division 2 Indoors with adequate ventilation 4 Entire room and any adjacent room not separated by a gastight partition Division 2 Outdoors in open air at or above grade Within 15 feet in all directions from this equipment and within the cylindrical volume between the horizontal equator of the sphere and grade (See Figure H-1) Division 2 F Service station dispensing units Entire space within dispenser enclosure, and 18 inches horizontally from enclosure exterior up to an elevation 4 ft. above dispenser base. Entire pit or open space beneath dispenser Division 1 Up to 18 inches above grade within 20 ft. horizontally from any edge of enclosure Division 2 Note : For pits within this area, see Part F of this table G Pits or trenches containing or located beneath LP-gas valves, pumps, compressors, regulators, and similar equipment Without mechanical ventilation Entire pit or trench Division 1 Entire room and any adjacent room not separated by a gastight partition Division 2 Within 15 feet in all directions from pit or trench when located outdoors Division 2 With adequate mechanical ventilation Entire pit or trench Division 2 Entire room and any adjacent room not separated by a gastight partition Division 2 Within 15 feet in all directions from pit or trench when located outdoors Division 2 H Special buildings or rooms for storage of portable containers Entire room Division 2 I Pipelines and connections containing operational bleeds, drips, vents or drains Within 5 ft. in all directions from point of discharge Division 1 Beyond 5 ft. from point of discharge, same as Part E of this table J Container filling Indoors without ventilation Entire room Division 1 Indoors with adequate ventilation 4 Within 5 feet in all directions from connections regularly made or disconnected for product transfer Division 1 Beyond 5 feet and entire room Division 2 Outdoors in open air Within 5 feet in all directions from connections regularly made or disconnected for product transfer Division 1 Beyond 5 feet but within 15 feet in all directions from a point where connections are regularly made or disconnected and within the cylindrical volume between the horizontal equator of the sphere and grade (See Fig. H-1.) Division 2 1 The classified area must not extend beyond an unpierced wall, roof, or solid vaportight partition. 2 See chapter 296-46 WAC, and chapter 296-306A WAC Part T. 3 When classifying the extent of a hazardous area, consider the possible variations in the spotting of tank cars and tank vehicles at the unloading points and the effect these variations of actual spotting point may have on the point of connection. 4 Ventilation, either natural or mechanical, is considered adequate when the concentration of the gas in a gas-air mixture does not exceed twenty-five percent of the lower flammable limit under normal operating conditions. 1 The classified area must not extend beyond an unpierced wall, roof, or solid vaportight partition. 2 See chapter 296-46 WAC, and chapter 296-306A WAC Part T. 3 When classifying the extent of a hazardous area, consider the possible variations in the spotting of tank cars and tank vehicles at the unloading points and the effect these variations of actual spotting point may have on the point of connection. 4 Ventilation, either natural or mechanical, is considered adequate when the concentration of the gas in a gas-air mixture does not exceed twenty-five percent of the lower flammable limit under normal operating conditions.