Conduit cover wall9/4/2023 ![]() ![]() Occasionally, an electrician may install an extra unused switched conductor in a luminaire outlet box installed in the ceiling. Ceiling paddle fans more than 70 lb must be supported independently of the outlet box. If the box is marked with a weight, it can support a fan up to that weight, but not more than 70 lb. If the maximum weight isn’t marked on the box, it is allowed to support a fan up to 35 lb. Outlet boxes used as the sole support of a ceiling-suspended (paddle) fan must be listed and marked as suitable for this purpose. The 2011 revision also: breaks up the requirements into a list format, for easier reading incorporates the provisions for lampholders into the title of the rule and revises the luminaire box ratings for clarity and ease of reading. The 2011 revision corrects an error in the previous NEC by requiring that boxes installed in a wall for luminaire support must be marked on the interior of the box to indicate the weight ratings of the box. Significant changes often bring numerous errors. The 2008 revision of the NEC significantly changed 314.27. For example, Type RTRC conduit has been added to the list in this exception. In addition, it names more types of raceways that can use this exception. The 2011 NEC revision to this section presents the exception in an easier-to-understand list format. The exception for the support of conduit bodies has been equally difficult. The allowance for a raceway-supported box or conduit body in 314.23(E) has been one of the more difficult rules for a Code user to read, due to the length of the rule and the number of technical requirements found in it. Gaps around boxes with flush-type covers that are recessed in noncombustible surfaces (e.g., plaster, drywall, or plasterboard) must be repaired so there’s no gap greater than 1⁄8 in. Now, 314.21 includes any noncombustible surface. The 2011 revision also changed 314.21 to mirror the language found in 312.4. ![]() This differed from previous Code language, which mentioned only drywall, plasterboard, and plaster surfaces. at the edge of a cabinet, cutout box, or meter socket enclosure. The 2008 NEC changed 312.4 to require that noncombustible wall surfaces must be repaired if there are gaps or open spaces greater than 1⁄8 in. Many of those, such as the rule for repairing the surfaces of walls and floors around electrical boxes, have changed. In Part II, we find installation requirements. 314 helps you select the right outlet, device, and junction boxes - and size them properly.Īs with any other Article, Part I provides the scope and general information. If you install a box in a wet location, for example, you must use a box, fittings, and installation methods that are acceptable for wet locations. The specific conditions of use will often determine the type of box and installation methods required. Article 314 contains installation requirements for outlet boxes, pull and junction boxes, conduit bodies, and handhole enclosures.
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