wire clamps required at metal junction boxes Electrical - AC & DC - Plastic wire clamp in a metal box? - I found the below plastic wire clamp in a metal ceiling fan pancake box. . Fished cables are not required to be stapled. Upvote #4 03-02-10, 05:31 PM . Are those allowed in metal junction boxes as well or just device boxes? Quote: Originally Posted by ibpooks.
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0 · wire clamps for breaker box
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wire clamps for breaker box
You either need a NM clamp or some sort of plastic grommet to secure the wire. NM clamps are easier to find in most cases. You need 1/2" clamps, but they may be labeled 3/8". Remember to only remove the . If you have a metal box, use a screwdriver as a lever to remove the knockouts (the precut metal discs on either side of the box). You’ll also need to install cable clamps in the metal box. These thread into the box from the outside. Are you going to a metal or a plastic junction box? Generally, the wires would just pass through a knockout with a hub to receive the conduit, which functions similarly to a cable clamp (where the cable sheathing is the .
When UL approves the box, they also approve the labeling on the box, and the instruction sheet intended to go with the box. Of course, big-box stores buy by the carton, sell them loose in bins, and don't give you the .
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.
Electrical - AC & DC - Plastic wire clamp in a metal box? - I found the below plastic wire clamp in a metal ceiling fan pancake box. . Fished cables are not required to be stapled. Upvote #4 03-02-10, 05:31 PM . Are those allowed in metal junction boxes as well or just device boxes? Quote: Originally Posted by ibpooks.Amazon.com: junction box clamp. . 24 Pcs Clamp Type Cable Connectors 1" 3/4" 3/8" Electrical Box Connectors Wire Clamp for Metallic Conduit Protect Cables Silver, Zinc Alloy. 3.6 out of 5 stars. 5. . 3/8 Inch Flexible Metal Conduit (FMC) Clamp Combination Connector – 05711B – 50 Per Pack. 4.7 out of 5 stars. 31. I spent about .00 on a metal ceiling fan box, but it didn't come with any screw-in clamps. . 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 leaves any kind of metal box--be it for a light switch, outlet, light fixture, or junction box? Speedy Petey Licensed .
All the boxes we use have approved clamps for both AC and MC. We have been using them for 30 years now. I can't remember ever having any call backs for cut wires from the clamp. I seen cut wire from use with a hacksaw ( showing my age) but with everyone today using rotosplit I see no problem at all. With old work boxes thats all we use is the clamp
Securing wire entering box from 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. . I know that some people like to switch to THHN wires in a junction box before a conduit. This just seems like an unnecessary step and extra exposed junction cover here. 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 if this is allowed by code. . The only built in clamp is for the transformer wire (in the box) to the light. The .
Plastic electrical boxes that hold 1 electrical receptacle have rectangular "knock-outs" in them, so the circular types of wire clamps used to clamp wires into metal boxes can't be used. Are the knock-outs also supposed to work as clamps? Or are there special clamps that work with plastic boxes? One Youtube video I saw says to "staple the wire within 8 inches of .New work box is designed for new construction jobs and features 12 integral wire clamps to hold wiring securely and an adjustable metal bracket for quick mounting between studs; Electrical switch and outlet box is made from sturdy PVC for better durability; Comes with 2 angled nails for easy installation and organization of this PVC junction boxStudy with Quizlet and memorize flashcards containing terms like A 2 ½ in. rigid metal conduit enters the back of a pull box with a removable cover on the opposite side. The raceway encloses four 4/0 AWG THHN copper conductors and one 4 AWG equipment grounding conductor. The minimum depth (distance from the entry wall to the cover) for this pull box is ______ in., . Therefore the 8" staple rule applies! With this type of box it is required to staple within 8", a box with a clamp is 12"! An "old work" Handy box would have a clamp as well as plaster ears with a screw device to secure the box. Notice the "Clamp" type box Notice the "Knockout" type box. See Tester101 code quote "314.17 C Exception. Says it all!
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. . never splice a wire without a junction box. PERIOD. . If your using metal boxes then use clamps. With plastic boxes were required to fireblock the penetrations In wall-mounted metal light switch/outlet boxes that have built-in cable clamps, is a plastic grommet necessary where the cable enters the box after removing the knockout? . The cable clamp has a "flange" that covers .
romex clamps that pass code
A 411/16 square box that is 21/8" deep already contains two receptacles, two internal cable clamps, four 12 AWG THHN copper conductors (2 black and 2 white), two grounding conductors, three wire nuts, two pigtails, and one .I have seen some appealing metal boxes, but I am wiring using NM cable (Romex), which needs cable clamps where it enters a metal box. I can't find these anywhere! Some metal boxes come with them, but those are generally single .In a box with an NM clamp, no bushing is needed. What you have is for MC/AC/BX cable. Buy the right box. Not to be that guy but if you can't figure out the right material, with names of the wiring method on the tag at home depot - you might just need to . My house has mostly AC/BX wiring. I have added a light to an existing lighting circuit and pulled #12 Romex into an existing metal box. Problem is, this box has no 1/2" or standard size knockouts. It has only the smaller AC knockouts. I need a snap-in cable clamp to properly ensure my non-metallic insulation doesn't get cut on the metla box .
the second major differentiator between plastic and metal boxes as far as switches and Outlets are concerned is that plastic boxes have a 2 inch by 4 in footprint, which quite frankly is a little bit easier to work with for tucking the wires in whereas gangable metal wall case boxes are 2x3 footprint and you have to compensate with more depth .
I am mounting this Carlon 1-gang junction box to my exposed basement walls (block foundation) via tapcon screws.. I will be running 12/2 Romex into the box (this will be an outlet in my basement). Although the Romex will chew up more than half the available area of the knockout, there will still be "open space" between the walls of the knockout and the Romex where . The simplest form of a clamp is something that doesn't allow the cable to be pulled out. The classic version was a knot (probably not acceptable by code -- although we don't know where the OP lives [using imperial and wire gauge kinda narrows it down] -- and not even feasible with thicker cables). If redundant grounding is desired or required, the metal box allows the yoke of a "self-grounding" device to serve as an alternate EGC path. Belt and suspenders. . since it's so flimsy to begin with that you need the extra support that metal box designs can offer. The kind of wire I'd use would also be up to what was allowed. Many commercial .I decided to run NM-B wire rather than conduit through the wall to minimize the size of the hole to drill through the wall, especially trying to reduce the size of stucco hole. I'm a little stuck on clamping requirements for the NM-B. I have the NM-B clamped at the metal junction box - do I need to also clamp the wire at the exterior junction box?
Article 334.30 states that cables coming out of the junction boxes should be secured within 12 inches of the box in all boxes equipped with cable clamps. . states that cables must be secured to the receptacle box. Although, in article 314.17(C)'s exception, nonmetallic boxes have no cable clamps and must have cables supported within eight . I don't have access to the back side of the box, because the ceiling is finished (metal lath and plaster). I'm thinking I could remove this a few different ways: twist the wires together, wire nut, and leave in the box; cut the exposed copper, and electrical tape the ends; cut the wires back to the cable clamps
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wire clamps required at metal junction boxes|romex clamp size chart