can i use plastic knockout plugs on a metal box What is the NEC compliant method for plugging an unused knockout hole where a conduit connector used to be? I see different types - the pop in friction fit, and the mechanical fastener fit with a screw or wing nut. Junction boxes are placed at duct intersections to provide: 1 - Access to the underfloor duct system in order to pull wires or make splices. 2 - A method to separate duct runs as they cross each other at the intersection.
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What is the NEC compliant method for plugging an unused knockout hole where a conduit connector used to be? I see different types - the pop in friction fit, and the mechanical fastener fit with a screw or wing nut. Use a metal electrical box when metal-sheathed cable (also called armored BX cable) or metal conduit runs in or out of the box. Metal cable and conduit depend on the .
If you do want to reinstall, I recommend using the heavier duty plastic boxes or metal boxes. From experience, the thicker blue boxes made by Carlon* are less susceptible to . You can use plastic covers on metal boxes. Metal covers require that you use a proper method to ground them as well. Typically being screwed to a grounded metal box or a . Cables which have a Metal jacket can only be connected to a metal box unless the plastic box is made with a bonding strap that would connect all of the factory knock outs to each other. That type of plastic box is quite rare. We use the Arlington plastic ones all the time. IF you can access the "outside" of the box, then that is where we insert them from. IF NOT, then push `em out from the inside, as that is where you can see them.
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Is it ok to use a metal knockout seal on a plastic junction box for my dryer? They make plastic ones. Is it a slip hub, threaded hub, or just a hole you drilled out? Probably best to just find . Why not? And for those who are saying different, cite me the section in the Code where you can't. You ain't going to find it. You can use plastic connectors in a metal box, why . I would like to cut in a plastic box with a metal faceplate with knock out, and 90 degree connector to give the MC cable a clean, flush finish. I guess maybe the solution is to .
What is the NEC compliant method for plugging an unused knockout hole where a conduit connector used to be? I see different types - the pop in friction fit, and the mechanical fastener fit with a screw or wing nut. Use a metal electrical box when metal-sheathed cable (also called armored BX cable) or metal conduit runs in or out of the box. Metal cable and conduit depend on the contact from its metal sheathing to the metal box to complete grounding. Most plastic boxes have built-in spring tabs that secure the cable as it's pushed into the box. When it comes to metal boxes , there are several different clamping methods you can use, but first, you have to remove a knockout in the box. I would have to agree that a metal box with metal KO seals fully constitutes a complete assembly. As far as plastic KO seals, personally I would reserve those for LV, Comm and FA closures. We'll check with AHJD for their view as well.
If you do want to reinstall, I recommend using the heavier duty plastic boxes or metal boxes. From experience, the thicker blue boxes made by Carlon* are less susceptible to trap door failure. *Other manufactures might make this style box as well, but Carlon is the only one I've seen in my area. You can use plastic covers on metal boxes. Metal covers require that you use a proper method to ground them as well. Typically being screwed to a grounded metal box or a grounded device (receptacle/switch) suffices. Cables which have a Metal jacket can only be connected to a metal box unless the plastic box is made with a bonding strap that would connect all of the factory knock outs to each other. That type of plastic box is quite rare.
We use the Arlington plastic ones all the time. IF you can access the "outside" of the box, then that is where we insert them from. IF NOT, then push `em out from the inside, as that is where you can see them. Is it ok to use a metal knockout seal on a plastic junction box for my dryer? They make plastic ones. Is it a slip hub, threaded hub, or just a hole you drilled out? Probably best to just find another PVC box with the correct number of entrances and outlets. I would not unless the metal part is connected to earth 🤣.
Why not? And for those who are saying different, cite me the section in the Code where you can't. You ain't going to find it. You can use plastic connectors in a metal box, why not plastic knockout fillers? Even the breaker blanks are plastic these days!!
What is the NEC compliant method for plugging an unused knockout hole where a conduit connector used to be? I see different types - the pop in friction fit, and the mechanical fastener fit with a screw or wing nut. Use a metal electrical box when metal-sheathed cable (also called armored BX cable) or metal conduit runs in or out of the box. Metal cable and conduit depend on the contact from its metal sheathing to the metal box to complete grounding. Most plastic boxes have built-in spring tabs that secure the cable as it's pushed into the box. When it comes to metal boxes , there are several different clamping methods you can use, but first, you have to remove a knockout in the box.
I would have to agree that a metal box with metal KO seals fully constitutes a complete assembly. As far as plastic KO seals, personally I would reserve those for LV, Comm and FA closures. We'll check with AHJD for their view as well. If you do want to reinstall, I recommend using the heavier duty plastic boxes or metal boxes. From experience, the thicker blue boxes made by Carlon* are less susceptible to trap door failure. *Other manufactures might make this style box as well, but Carlon is the only one I've seen in my area. You can use plastic covers on metal boxes. Metal covers require that you use a proper method to ground them as well. Typically being screwed to a grounded metal box or a grounded device (receptacle/switch) suffices. Cables which have a Metal jacket can only be connected to a metal box unless the plastic box is made with a bonding strap that would connect all of the factory knock outs to each other. That type of plastic box is quite rare.
We use the Arlington plastic ones all the time. IF you can access the "outside" of the box, then that is where we insert them from. IF NOT, then push `em out from the inside, as that is where you can see them. Is it ok to use a metal knockout seal on a plastic junction box for my dryer? They make plastic ones. Is it a slip hub, threaded hub, or just a hole you drilled out? Probably best to just find another PVC box with the correct number of entrances and outlets. I would not unless the metal part is connected to earth 🤣.
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can i use plastic knockout plugs on a metal box|plastic electrical boxes with knockouts