UL-1238:2015 pdf free download – STANDARD FOR SAFETY Control Equipment for Use with Flammable Liquid Dispensing Devices.
5.2.4 A snap-on cover that gives access to exposed live parts and that does not require a tool for removal shall comply with the tests in Snap-On Covers, Section 40.
5.2.5 The continuity of the bonding means for a snap-on or fastener-attached cover shall comply with the requirements in 13.1.1 — 13.1.4, 13.2.1, and 13.2.2.
5.2.6 An enclosure cover shall be hinged when it gives access to a fuse, thermal cutout, or any other overload-protective device, the normal functioning of which requires renewal, or when it is required to open the cover in connection with the normal operation of the device.
5.2.7 A door or cover giving access to a fuse or thermal cutout in other than a low-voltage circuit shall shut closely against a 1/4 inch (6.4 mm) rabbet or strips that have been determined to be equivalent, or shall have either turned flanges for the full length of four edges or angle strips fastened to it. Flanges or angle strips shall fit closely with the outside of the walls of the box proper and shall overlap the edges of the box not less than 1/2 inch (12.7 mm). An appropriate construction that affords protection that has been determined to be equivalent or a combination of flange and rabbet is permissible.
5.2.8 Strips used to provide rabbets, or angle strips fastened to the edges of a door shall be secured at not less than two points, not more than 1-1/2 inches (38 mm) from each end of each strip and at points between these end fastenings not more than 6 inches (152 mm) apart.
5.2.9 A hinged cover shall be provided with a spring latch or catch, and not depend solely upon screws or other similar means requiring the use of a tool to hold it closed. For a hinged cover that is provided, although not required, a hasp, sliding latch, or other means for holding the cover closed can be employed.
5.3 Cast metal
5.3.1 Cast metal for a general purpose enclosure shall be at least 1/8 inch (3.2 mm) thick at every point, of greater thickness at reinforcing ribs and door edges, and not less than 1/4 inch (6.4 mm) thick at tapped holes for conduit; except that, other than at plain or threaded conduit holes, die-cast metal shall not be less than 3/32 inch (2.4 mm) thick for an area greater than 24 square inches (155 cm2) or having any dimension greater than 6 inches (152 mm), and shall not be less than 1/16 inch (1.6 mm) thick for an area of 24 square inches (155 cm2) or less and not having dimensions greater than 6 inches. The area limitation for metal 1/16 inch thick complying with the provision of reinforcing ribs subdividing a larger area. Die-cast metal of 0.035 inch (0.9 mm) minimum thickness can be employed in lieu of 1/16 inch thick die-cast metal when the enclosure will not be used as a splice box and when the voltage rating of the complete control is such that the voltage between any two conductors does not exceed 250 volts ac or dc; and die-cast metal of 0.028 inch (0.71 mm) minimum thickness can be employed in lieu of 1/16 inch thick die-cast metal for an enclosure housing only low-voltage circuits.