![]() In an electrical junction box used to mount or connect a device, wires will be connected to the device such as a light fixture, fan, switch, or electrical receptacle. ![]() A junction box is an enclosure in which there will be one or more breaks in the electrical wire(s), connected by splices or other devices.Strictly speaking, a pull box does not contain electrical wire connections. A pull box is an enclosure through which electrical wires may pass continuously, without electrical splices or connectors.Is a junction box the same as a pull box?Īlthough the same physical electrical box might be used as either an electrical junction box or a pull-box, their uses are different: Illustration: a small pull box or junction box used with EMT or electrical metallic tubing - conduit. Electrical Conduit Pull-Box RequirementsĪ pull box is an electrical box placed at key locations in electrical conduit wiring systems in order to provide access in order to pull electrical wires through conduit during wiring installation. We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. The page top photo showing a pull box used to route wires thorugh conduit from a main electrical panel up to a raceway (not shown) that crosses a building to connect in a second, remote electrical panel located in an attached garage. Electrical conduit is metal or plastic rigid or flexible tubing used to route electrical wires in a building. This article series describes both metallic electrical conduit and plastic or non-metallic electrical conduit products, and answers basic questions about installing electrical conduit. We define pull boxes, junction boxes, and terminal boxes and we explain the differences in how these electrical components are used. This article describes the requirements for pull-boxes including sizing & spacing or distances between pull boxes & their locations. We have no relationship with advertisers, products, or services discussed at this website.Įlectrical Conduit pull boxes provide access to successfully pull wires through metallic or non-metallic conduit & raceways. We can also use the table below from NEC COMMENTARY TABLE 314.InspectAPedia tolerates no conflicts of interest. The volume allowance shall be made based on the largest equipment grounding conductor or equipment bonding jumper present in the box. A volume allowance will be made for each yoke or strap based on the largest conductor connected to a device(s) or equipment supported by that yoke or strap.ĥ-Equipment grounding conductor allowance:Įach set of grounding conductors or bonding conductors for an equipment are counted once. A volume allowance will be made for each type of fitting based on the largest conductor present in the box.Įach yoke or strap (which supports a device or equipment) mounted on the box is counted twice. A volume allowance will be made based on the largest conductor present in the box.Įach support fitting (such as luminaire studs or hickeys) inside the box is counted once. Each loop or coil of unbroken conductor not less than twice the minimum length required for free conductors in 300.14 shall be counted twice.Īll clamps inside the box are counted once.Each conductor that passes through the box without splice or termination shall be counted once.Each conductor that originates outside the box and terminates or is spliced within the box shall be counted once. ![]() To count the number of conductors in the box, we should follow the following rules:
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