UL 1030:2019 Sheathed Heating Elements

UL 1030:2019 Sheathed Heating Elements. 1.1 These requirements cover metal-sheathed heating elements intended for use in appliances and equipment that comply with the requirements for such appliances and equipment. 1.2 The main body of this standard covers requirements for sheathed heating elements rated 600 volts or less. Supplement SA covers cartridge-type sheathed heating elements that do not incorporate a bend in the sheath, rated between 601 and 15,000 V. 1.3 These requirements do not cover heating elements for use in equipment for use in hazardous locations as defined in the National Electrical Code, NFPA 70. 1.4 Wherever the terms heating element and element are used in these requirements, they are intended to mean a sheathed heating element as defined in 2.4. 2 Glossary 2.1 For the purpose of this standard the following definitions apply. 2.2 DIELECTRIC VOLTAGE WITHSTAND — The ability of a heating element to withstand specified voltages applied between current-carrying parts and dead metal parts for specified times without flashover or puncture. 2.3 LEAKAGE CURRENT — A current, including a capacitively coupled current, that may be conveyed between exposed conductive surfaces of a heating element and ground. 2.4 SHEATHED HEATING ELEMENT — A resistance element that is usually encased in magnesium oxide or encased in a similar insulating material that is, in turn, surrounded by a metal sheath. 2.5 SHEATH WATTAGE DENSITY — The watts per unit area of actively heated sheath surface area. The actively heated sheath surface area is considered to be the area of the exposed surface of that portion of the sheathed heating element between the terminal pins. See Figure 2.1. 2.6 TEST VOLTAGE — The voltage required to obtain rated watt density, but no less than the rated voltage of the heating element. 3 Units of Measurement 3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 4 Undated References 4.1 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. CONSTRUCTION 5 General 5.1 The acceptability of a heating element in any equipment or appliance depends upon its ability to withstand continued use under the conditions that prevail in actual service. In addition to the requirements contained herein, further considerations and investigations may be necessary, based upon the intended installation and use of the sheathed heating element....