4/17/2023 0 Comments Plaster rings and domed coversPartially protected external locations under canopies, marquees, roofed (open) porches, and similar sites are considered damp locations as are some interior locations such as certain basements, barns, and cold-storage warehouses. Damp locations, as defined in Article 100, are locations subject to moderate degrees of moisture. This month's In Focus discusses Installation (Part B).ģ70-15 Damp, Wet, or Hazardous (Classified) Locationsīoxes, conduit bodies, and fittings in damp or wet locations must be placed or equipped so as to prevent the entrance of, or internal accumulation of, moisture. Pull and Junction Boxes for Use on Systems Over 600 Volts, Nominal. Manholes and Other Electric Enclosures Intended for Personnel Entry (new to the 1999 edition), and E. It also covers manholes (including other electric enclosures intended for personnel entry). It covers the installation and use of all boxes (and conduit bodies) used as outlet, junction, or pull boxes, depending on their use. Article 370 contains detailed requirements for box fill and junction box sizing.Īrticle 370 of the National Electrical Code (NEC) covers a variety of provisions pertaining to boxes (outlet, device, pull junction), conduit bodies, and fittings. Of course, not one of these methods is correct. An optional creative method is to back out the junction box screws, insert a blank plate, then tighten the screws, thereby compressing the conductors. Such methods include, but are not limited to: carefully wrapping the conductors around the inside of the box so that no air space remains mashing the conductors down with the thumb, the heel of the hand or even by applying force with the handle of a hammer. Some creative methods have been devised to overpack the conductors into a junction box so that the cover can still be installed. Unfortunately, all too often, electricians remove junction box covers only to find the box crammed full of conductors. Contrary to popular electrical opinion, designated rules limit the number of conductors allowed within outlet, device, and junction boxes.
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