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// CODE SNIPPET

(1) Nails and Screws

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 > (1) Nails and Screws
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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.

Related Code Sections


(1) Wiring Methods and Materials, Nails and Screws
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 ...
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 > (1) Nails and Screws
(2) Wiring Methods and Materials, Nonmetallic-Sheathed Cable and Electrical Nonmetallic Tubing
Where nails or screws are likely to penetrate nonmetallic-sheathed cable or electrical nonmetallic tubing, a steel sleeve, steel plate, or steel clip ...
National Electrical Code 2020 of Minnesota > 3 Wiring Methods and Materials > 300 General Requirements for Wiring Methods and Materials > 300.4 Protection Against Physical Damage > (B) Nonmetallic-Sheathed Cables and Electrical Nonmetallic Tubing Through Metal Framing Members > (2) Nonmetallic-Sheathed Cable and Electrical Nonmetallic Tubing
(D) Wiring Methods and Materials, Mounting of Conductor Supports
Where nails are used to mount knobs, they shall not be smaller than tenpenny. Where screws are used to mount knobs, or where nails or screws are used ...
National Electrical Code 2020 of Minnesota > 3 Wiring Methods and Materials > 398 Open Wiring on Insulators > 398.30 Securing and Supporting > (D) Mounting of Conductor Supports
(B) Wiring Methods and Materials, Type NMC
as prohibited by 334.10(3) In outside and inside walls of masonry block or tile In a shallow chase in masonry, concrete, or adobe protected against nails ...
National Electrical Code 2020 of Minnesota > 3 Wiring Methods and Materials > 334 Nonmetallic-Sheathed Cable: Types NM and NMC > 334.10 Uses Permitted > (B) Type NMC
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