UL 778-2020 pdf free download

UL 778-2020 pdf free download.STANDARD FOR SAFETY Motor-Operated Water Pumps.
14.3 With reference to Table 14.1. as applicable, one of the following coatings shall be used:
a) Hot-dipped, mill-galvanized sheet steel conforming with the coating designation G60 or A60 in Table I of the Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process, ASTM A653/A653M-94. with no less than 40 percent of the zinc on any one side, based on the minimum single-spot test requirement in this designation. The weight of the coating shall be established in accordance with the test method of ASTM Designation A90-69, or by any method that has been determined to be similar. An A60 (alloyed) coating shall also comply with 146.
b) A zinc coating, other than that provided on hot-dipped, mill-galvanized sheet steel, uniformly applied to an average thickness of no less than 0.00041 inch (0.0104 mm) on each surface, with a minimum thickness of 0.00034 inch (0.0086 mm). The thickness of the coating shall be established by the Metallic Coating Thickness Test, Section 4. An annealed coating shall also comply with
14.6.
c) Two coats of an organic finish of the epoxy or alkyd-resin type or other outdoor paint on each surface. The acceptability of the paint is to be determined by consideration of the composition or. when required, by the corrosion tests specified in 14.5.
d) A single coat of an organic finish of the epoxy or alkyd-resin type over phosphate- or oxide- treated steel In a form that has been shown to be equivalent to mill-galvanized steel as noted in (a). Organic coatings shall comply with the Standard for Organic Coatings for Steel Enclosures for Outdoor Use Electrical Equipment, UL 1332.
14.4 With reference to Table 14.1, as applicable, one of the following coatings shall be used:
a) Hot-dipped, mill-galvanized sheet steel conforming with the coating designation G90 in Table I of the Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process, ASTM A653/A653M-94. with no less than 40 percent of the zinc on any side, based on the minimum single-spot-test requirement in this designation. The weight of the zinc coating shall be established in accordance with the test method of ASTM Designation A90-69, or by any method that has been determined to be similar.
b) A zinc coating, other than that provided on hot-dipped, mill-galvanized sheet steel, uniformly applied to an average thickness of no less than 0.00061 inch (0.01549 mm) on each surface with a minimum thickness of 0.00054 inch (0.01372 mm) The thickness of the coating shall be established by the Metallic Coating Thickness Test, Section 49. An annealed coating shall also comply with 14.6.
C) A cadmium coating no less than 0.001 inch (0.0254 mm) thick on both surfaces. The thickness of the coating shall be established in accordance with the Metallic Coating Thickness Test, Section 49.UL 778-2020 pdf free download.