UL 87-2016 pdf download – Power-Operated Dispensing Devices for Petroleum Products.
2.2 Units of measurement 2.2.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 2.3 Undated references 2.3.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. 3 Glossary 3.1 For the purpose of this standard the following definitions apply. 3.2 AIR GAP – A minimum of 1 inch (25.4 mm) free air space provided between the planes of Division 1 or Division 2 hazardous locations and an unclassified area of a dispensing device. 3.3 BASE – That part of the assembly which is intended to be secured to the foundation on which the device will be installed. 3.4 CLASS I HAZARDOUS LOCATIONS – Locations in which flammable gases or vapors are or may be present in the air in quantities sufficient to produce explosive or ignitable mixtures. For the purpose of these requirements, as applied to dispensing systems of other than the overhead type, the following classified areas are further defined. Such areas for overhead type systems shall be as specified in the Automotive and Marine Service Station Code, NFPA 30A. The area of the dispensing system covered by these requirements is the envelope defined by the maximum outer dimensions. a) Class I, Group D, Division 1 – 1 ) The area within a dispenser housing up to 4 feet (1 .2 m) vertically above the base, except for that area defined as Division 2 or unclassified. 2) Any area within a nozzle boot. b) Class I, Group D, Division 2 – 1 ) Areas within a dispenser housing above the Division 1 area. 2) The area surrounding the dispenser housing within 1 8 inches (46 cm) horizontally in all directions from the Division 1 area located within the housing. 3) The area within 1 8 inches horizontally, in all directions from the opening of a nozzle boot not isolated by a vapor-tight partition, except that the area is not required to be extended around a 90-degree or greater corner.
3.5 DISPENSER, REMOTE-CONTROL TYPE – A dispensing device that does not contain a power- operated pump as part of the assembly, and which is intended for connection to a fluid piping system containing the power operated pumps at a remote location. Also commonly identified as a ″dispenser.″ 3.6 DISPENSER, SELF-CONTAINED – A dispensing device that includes a power operated pump as part of the assembly. Also commonly identified as a ″pump″ or ″suction dispenser.″ 3.7 DISPENSING DEVICE – A product consisting of a meter, motor, or fluid control, and an area for storing a hose nozzle valve with or without a pump. 3.8 ELECTRICAL CIRCUITS – a) High-Voltage Circuit – A circuit involving a potential of not more than 600 volts and having circuit characteristics in excess of those of a low-voltage or Class 2 circuit. b) Low-Voltage Circuit – A circuit involving a potential of not more than 30 volts alternating- current (rms) (42.4 volts peak or direct current) and 1 ) Supplied by a Class 2 transformer, or by a battery, by a battery and fixed impedance, or by a transformer and fixed impedance each of which, as a unit, is in compliance with what is required for a Class 2 transformer or 2) Limited to a maximum of 1 00 volt-amperes. A circuit derived from a source of supply classified as a high-voltage circuit, by connecting resistance in series with the supply circuit as a means of limiting the voltage and current, is not considered to be a low-voltage circuit. c) Intrinsically Safe Circuit – A circuit incapable of releasing sufficient electrical energy under normal or abnormal conditions to cause ignition of a specific hazardous atmospheric mixture. Abnormal conditions include unintentional damage to any part of the equipment or wiring, insulation or other malfunction of electrical components, application of overvoltage, adjustment and maintenance operations, and other similar conditions.