need to use clamps with metal electrical box But one issue that I can’t seem to find addressed anywhere, likely because it is so obvious to everyone else(!), is what should happen with wires entering via a conduit (other than use of a bushing). The male terminals (pvc) and conduit clamps (metal) all seem to lack a means of securing the cable.
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0 · what is a cable clamp
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Some metal boxes have pre-attached clamps for gripping the electrical cable. Other boxes require you to purchase separate clamps, driving up the total cost of the box. Generally, .
If the box is being mounted directly to the sheathing then straight through the back is completely fine. If there is an airgap or rainscreen, I'll just use liquid tight or PVC with a threaded coupling into the back of the box and run it vertically .
Per Code, a single-gang plastic box for NM cable need not have a cable clamp. If you're working with the blue Carlon boxes, the most common brand in my area, the single-gang boxes have four knockouts, one in each corner. Those pop completely out, and are of no use as a clamp. Some other brands of SG plastic box have some sort of cable clamp.
The junction box (includes transformer on one side) is plastic and has knock outs for clamps of the in/out wires. I would like to use my metal clamps but, since the box/fixture has no ground and I am adding metal, I am not sure .
Which cable clamps are the right ones for old, installed metal boxes that only have a circular opening? Previously they had K&T wires and strain relief was implemented by pushing some sort of small metal plate together with the cable. I know re-wired Romex and would need to clamp them properly. Thanks!
But one issue that I can’t seem to find addressed anywhere, likely because it is so obvious to everyone else(!), is what should happen with wires entering via a conduit (other than use of a bushing). The male terminals (pvc) and conduit clamps (metal) all seem to lack a means of securing the cable. This video goes over a trick I learned on installing (tightening or loosening) the nut on electrical wire/conduit clamps used where wire or conduit enters me. I need to install a junction box for 240V going to two separate Thermostats for baseboard heaters (one 750W and another 1100W). Should Does NEC require that I use plastic or metal boxes for the The old owners left an unfinished electrical box that was the to be outlet for an EV car charger and I am thinking of gearing up to finish it( 3 foot run from the panel) however the only thing that is a little confusing to me is what kind of strain relief should I use on both sides as in this setup as there is a tube connecting the electrical box to the main panel.
If I have a metal handy box used to join two legacy BX armored cables that don't have a ground wire, do I need to ground that box like I would with NM cable by connecting the box with the NM ground.If you're just clamping down NM cable, not AC, then you can use pop-in Hit Lock Connectors instead of the clamps. They snap into the knockout to protect the sheathing from the metal and have a few plastic fingers that grip inserted cable to keep it from being pulled out, much like the knockouts in NM boxes. The smaller oblong knockouts in the corners of the box have NM clamps integral with the box - no additional clamp is needed. The integral clamp is a metal clip riveted to the box that the NM cable passes under when you shove it through the knockout. The round knockouts in the middle of the box sides require the separate clamp.
Honestly the pictured bar just looks like NM cable clamp, and there are two in the box. Those clamps are needed. What you have here is a more common problem: A shallow box. Or to be more precise, not a deep box. A great many boxes are too shallow for GFCI. I tried fitting an older GFCI into a common 2x2x4 1-gang metal box, and it wouldn't fit. 2. The clamp prevents the wires from rubbing against the sharp edges of the metal electrical box. Otherwise, the sharp edge would eventually wear through the insulation and cause a short circuit, or, if the box was not grounded properly, the metal box could become energized and give somebody a shock, possibly a lethal shock.Is there any more need to stress the . Where the FMC (sorry, I was incorrectly referring to it as AC) comes into the wall, I will switch the plastic boxes for metal boxes. And where I'm trying to use metal clamps with romex in plastic boxes (per the photo), I will switch to plastic clamps ().Thanks all for your help and sorry for the confusion. Article 314.23(B) of the National Electrical Code, says that the enclosure must be rigidly supported.. NEC 2008 314.23 Supports. (B) Structural Mounting An enclosure supported from a structural member of a building or from grade shall be rigidly supported either directly or by using a metal, polymeric, or wood brace.. Whether or not liquid nails would meet this criteria .
Box Fill Verification for Gangable Metal Box with Cable Clamp Jump to Latest Follow 2K views 4 replies 4 participants last post by Jim Port Mar 18, 2016
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Ok so I have a single-gang metal "new work box" currently installed, attached to the stud with straps. I'm adding a device so I need to install a 2-gang metal old work box in it's place. I need a box that's deep, and with the knockouts far .
If you use a junction box, it has clamps that put pressure on all the wires coming into it. That reduces the chances of the splice pulling apart. . Any high-voltage splices need to be in a box, that is grounded. You don't have to splice low voltage (e.g phone lines, ethernet, or doorbell wires) in a box but its a good practice to so the . You can use a metal electrical box with a conduit. Cons. . Although PVC can melt under extreme heat, it is non-conductive. Additionally, many plastic boxes have integrated wire clamps, which helps reduce the overall project . Metal junction boxes need to be grounded in order to provide a path for fault current to return to the source and to .
what is a cable clamp
I updated the link to reflect this. @HariGanti The NM will run through the wall and then through some flashing directly into the box. It will not be outside at any point. The surface mount box is easier to mount than trying to cut through the flashing and whatever wood is inside the wall to get a box in there. – I need to cut in some sconce light fixture boxes in. The wiring method is MC cable. What do I use for a box, I have never seen a round old work box. I do not think I can use a single gang box as I believe I need to use at least 8/32 screws to hang the box? I could use a metal octagon box with. Studs are 3 5/8". Electrical is being run with Metal clad cable. MC lite. I'm in nyc so i need metal boxes with side clamps. What size and depth should I get? Also anyone know of boxes that have a bar that braces on the wall behind it .
I spent about .00 on a metal ceiling fan box, but it didn't come with any screw-in clamps. Does that mean it is not required, or do I have to supply my own? The Romex cable is stapled up to a few inches of the opening in the box. Is a screw-in clamp required whenever a cable enters or. I am using plastic electrical boxes in my home theater. I don't have much experience with electrical work, and most of what I know is based on a book called "Complete Guide to Home Wiring" fromt he Black&Decker series. This book says that single gang plastic boxes don't require cable clamps, whereas multi-gang boxes do. I recently replaced a bathroom extractor fan. The new model uses "quick connect" electrical connectors, where I stick the house wiring into this little plastic device, and apparently that's all! The previous extractor fan used wire nuts in a metal-enclosed space similar to a junction box, but for this new model the wires just dangle out of the extractor fan module, and there's . 4.1.1 Key Features of Old Work Outlet Boxes . Adjustable Clamps: . outlining their advantages, drawbacks, and best-use scenarios. 6.1 Metal Electrical Boxes . 6.1.1 Types of Metal Electrical Boxes . Steel: A common choice due to its strength and durability. Steel boxes are often coated to prevent corrosion, making them suitable for heavy-duty .
Metal boxes have rear and side knock-outs that require supplementary clamps. In addition, metal boxes’ sharp edges can take a toll on hands. . Use a metal electrical box when metal-sheathed cable (also called armored BX cable) or metal conduit is running in or out of the box. . eliminating the need for additional clamps. On the downside .
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need to use clamps with metal electrical box|cable clamp for junction box