// CODE SNIPPET
(B) Structural Mounting
JUMP TO FULL CODE CHAPTER
An enclosure supported from a structural member or from grade shall be rigidly supported either directly or by using a metal, polymeric, or wood brace.
Nails and screws, where used as a fastening means, shall secure boxes by using brackets on the outside of the enclosure, or by using mounting holes in the back or in one or more sides of the enclosure, or they shall pass through the interior within 6 mm (1/4 in.) of the back or ends of the enclosure. Screws shall not be permitted to pass through the box unless exposed threads in the box are protected using approved means to avoid abrasion of conductor insulation. Mounting holes made in the field shall be approved.
Metal braces shall be protected against corrosion and formed from metal that is not less than 0.51 mm (0.020 in.) thick uncoated. Wood braces shall have a cross section not less than nominal 25 mm × 50 mm (1 in. × 2 in.). Wood braces in wet locations shall be treated for the conditions. Polymeric braces shall be identified as being suitable for the use.
Related Code Sections
(B) Wiring Methods and Materials, Structural Mounting
An enclosure supported from a structural member or from grade shall be rigidly supported either directly or by using a metal, polymeric, or wood ...
National Electrical Code 2020 of Minnesota > 3 Wiring Methods and Materials > 314 Outlet, Device, Pull, and Junction Boxes; Conduit Bodies; Fittings; And Handhole Enclosures > 314.23 Supports > (B) Structural Mounting
(7) Equipment for General Use, Structure Mounted Outdoors
The height of cutouts mounted outdoors on structures shall provide safe clearance between lowest energized parts (open or closed position ...
National Electrical Code 2020 of Minnesota > 4 Equipment for General Use > 490 Equipment Over 1000 Volts, Nominal > 490.21 Circuit-Interrupting Devices > (C) Distribution Cutouts and Fuse Links — Expulsion Type > (7) Structure Mounted Outdoors
(B) Wiring and Protection, Other Cables
Cables that are not approved for mounting in contact with a building or other structure shall be mounted on insulating supports installed ...
National Electrical Code 2020 of Minnesota > 2 Wiring and Protection > 230 Services > 230.51 Mounting Supports > (B) Other Cables
18.104.22.168 Electric Elevators, Frames
Weight sections of a counterweight shall be mounted in structural or formed metal frames so designed as to retain them securely in place (see ...
Safety Code for Elevators and Escalators 2016 of Minnesota > 2 Electric Elevators > 2.21 Counterweights > 2.21.1 General Requirements > 22.214.171.124 Frames
(1) Special Equipment, Unit Heaters
Unit heaters shall be rigidly mounted to the structure and shall be of the totally enclosed or guarded type. Unit heaters shall not be mounted over ...
National Electrical Code 2020 of Minnesota > 6 Special Equipment > 680 Swimming Pools, Fountains, and Similar Installations > 680.27 Specialized Pool Equipment > (C) Deck Area Heating > (1) Unit Heaters