why did they decide plastic junction boxes are ok Metal boxes are better when you need the strength and volume to make up a ton of wires. The blank covers fit better than a plastic box. The holes are easily used by adding a romex connector of the right size. I use plastic . Formed sheet metal parts must be fully defined as a finished good in the completed (folded) state per section; however, sheet metal parts also require specific data to .
0 · why plastic electrical boxes
1 · plastic junction boxes vs metal
2 · plastic junction boxes
3 · plastic junction box wiring
4 · plastic electrical box problems
5 · plastic electrical box cons
6 · plastic boxes vs metal
7 · electrical box vs plastic box
Metal flashing and housewrap usually depend on gravity and laps for watertightness. Flashing tapes and peel-and-stick flashing use a different approach: to stay .
Although these junction boxes are a convenient place to protect the wiring system, they will require the appropriate cover to help keep everything in working order. Suppose you are a home or property owner searching for the best electrical box cover. In that case, you likely already know there are loads of . See moreAn electrical box should be able to withstand harsh or unusual conditions to ensure the safety of the electrical equipment as well as anyone who accesses the box. . See more Discover the pros and cons of plastic vs metal junction boxes. Learn which is better for your electrical projects based on durability, safety, and cost.
Metal boxes are better when you need the strength and volume to make up a ton of wires. The blank covers fit better than a plastic box. The holes are easily used by adding a romex connector of the right size. I use plastic .
Plastic Junction Box: Plastic junction boxes are not so sturdy, so not suitable for outside areas. They are UV rays sensitive and can even melt ( having melting points ranging from 100°C to 350°C) in some situations, .Compared to plastic boxes, metal electrical boxes are very strong: It is virtually impossible to bend, warp, twist, or crush metal electrical or junction boxes. Metal electrical boxes can. Electrical junction boxes made from durable, high-grade plastics are increasingly popular. What are the common pros and cons that electrical designers and contractors should be aware of when choosing whether to use .
As far as I can tell plastic boxes are an inferior box once installed, but plastic are easier/faster to install than metal. For example plastic boxes often have built in nails and romex clamps, while metal boxes lack both. The most commonly used electrical boxes are constructed of plastic but there are times a metal junction box should be used instead. Learn more. Plastic electrical boxes, sometimes called junction boxes, have plenty of pluses, including low cost, convenience, and ease of installation. But they’re not the best choice for every application. When plastic doesn’t make . Overcrowding the junction box, using the wrong type or size of the box, poor wire connections, and neglecting proper grounding are pitfalls to avoid. Overcrowding can lead to overheating, while using an incorrect box may result .
Metal box itself should be grounded and the switches are attached to it w metal screws, so the switches are grounded. In a plastic box you need to ground the individual switches because them being attached to the plastic box doesn’t ground them and can result in someone touching the switch to become the shortest path to ground.
why plastic electrical boxes
While they’re here we’re also removing some of the older bx cables. In the basement there is an extremely complicated web of older bx cables that we just don’t understand. There’s a junction box every 2-3ft on every line and all are connected to each other like one large web. Is this something common that was done on purpose? Then, remove the existing junction box cover and wiring. Next, install the new junction box according to the instructions. Once the box is in place, secure the fan wiring to the box, then cover the box and restore the power. Types of Ceiling Fan Junction Boxes. There are two main types of ceiling fan junction boxes available: plastic and metal .
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Loose connections generate heat and/or arcing so if that connection is right next to the wood, it would set the house on fire whereas if you had it in a properly bonded box, as soon as the exposed wire touched the box, it would cause a ground fault and trip the breaker. plastic and fiber glass boxes are also designed to contain sparks. Lightweight plastic junction boxes do not rust and are generally cheaper, making them preferable for outdoor waterproof junction boxes and installations. However, though aluminum waterproof junction boxes, especially cast aluminum, are prone to corrosion, they are much more robust, conduct less heat, and withstand more mechanical shock than . Plastic boxes are far superior for NM cable wiring simply because the don't conduct electricity. Plus they are less expensive and easier to install. Some people think plastic = cheap. Sponsor . I have seen light fixture boxes used for & called junction boxes . If installing a box in a ceiling that might have a light fixture or ceiling fan .
Why would I choose fiberglass vs plastic vs medal junction boxes (wiring a pole building). In addition, I've read it is . Why would I choose fiberglass vs plastic vs medal junction boxes (wiring a pole building). . steel boxes can be used but will rust sooner than the outdoor rated box) where they will be exposed to temperature fluctuations .You reach the maximum number of conductors in the box well before you run out of knock out space. I double up sometimes for 3 cable boxes because it's easier to lay the wires neatly in the box if they are all going the same direction. If the plastic box has a plastic or non metallic cover then it would be ok. The ground to the splice, well that is another can o corn. Unless there is a provision in the plastic box to ground the metal cover you need to use a non metallic cover. Botta boom botta betta beertime.
plastic junction boxes vs metal
They were also a pain with my 12 g wire, they seemed to not want to go on sometimes. Wagos are my current overall preferred connectors, even with the higher price. I'm also just a diyer, it seems some electricians will only use wire nuts too. Edit: apparently they actually are rated for stranded as well, I just didn't like how they connected then.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 .
Metal conduit and junction boxes outside MUST be grounded for the same reason even low voltage cable must be, it gives static from things like wind a place to go instead of building up and creating a lightning rod (which is a misnomer as a real lightning rod prevents the strike by giving the static an earth/ground path that’s safe). If you have a plastic box (I think you said you did), they are typically not grounded, but you could attach the wire to a grounding screw anyway, not that it is going to do anything in that case. Definitely do not attach the ground wire to the neutral. The grounding wire is the independent equipment ground, which is there in case there is a .
the whole point of them is that you dont need to undo the splice. when i met with a rackatier rep, they said that they were designed to be used for renos. example: you go into an attic and see a splice not in a JB, you use one of these and move on.
I feel your pain. My old house had a few like this. Also had 14g wire on 20 amp circuits, reversed polarity on some circuits, random grounds missing, a few outlets without junction boxes behind them, Romex spliced into knob and tube wiring . Some junction boxes were only made to support a standard light fixture when they were installed. Since a ceiling fan is much heavier, make sure the mounting screws are long enough (and there is more than one) to support the weight. . (nationwide) plenty of those nice plastic junction-boxes melt down when something goes awry with the .
Why Metal boxes vs Plastic boxes in Canada . I just moved to Ontario(windsor), and was born in the states. . They do, it's one of the reasons why we don't have to bond our switches. Also, all our metal boxes come with ground screws; I've heard you guys have to purchase ground screws separately. . A place to discuss safe, scientifically . Plastic you have to attach it at its designed anchor points or it'll crack. If you're going through drywall with a metal box, you buy the (typically a 4x4) box and an appropriate 1-gang or 2-gang mud ring. The 4x4 boxes have more room than a 1-gang box. The drywall hole only needs to be as big as the mud ring - NOT 4x4.
Most outdoor lights won’t need a junction box because you can usually connect them on a low voltage circuit. But in some cases, junction box for outside light is need. We’ll explore the importance of a junction box and why it’s essential for your outside lights. Read on to learn more about what a junction box is and when it’s necessary.
plastic junction boxes
The "J-Box" is the Junction Box, Kawasaki part number 26021-1091. It's under the left side cover and it's where all your fuses are, and it has a circuit board with some relays ion it. I think all of the electrics on the bike go through the j-box at some point, except the actual starter cranking current.My original Bosch came with a junction box that plugged into the dishwasher, then was hard wired into the wall box. The replacement (under warranty) was a newer upgraded model, but the junction box needed to be purchased separately. They no longer include the part as standard.
Welcome to /r/Electricians Reddit's International Electrical Worker Community aka The Great Reddit Council of Electricians Talk shop, show off pictures of your work, and ask code related questions. Further in some cities (e.g. Chicago) they are required by Code. The purpose of a box is to provide grounding and fire protection, and metal boxes do that better than plastic ones in all respects. Plastic boxes exist to be cheap, so builders can save per house. Metal boxes also allow there to be fewer (or no!) ground wires in the box. For .
I know this will be dismissed as nonsense, but why install the boxes if you dont need them. If you are doing any renovations involving permits, I would install the boxes. If you decide to install the boxes just use round or octagonal type. You must have a way to secure them to the stud or the wall behind them.
If the wires are not spliced properly, you (or an electrician) can't access the box and may not even know it exists to correct the problem. Its also a potential danger to someone working on that wall in the future if they drill or cut into it. I believe they do make a system that is rated to splice inside the wall without a box. Some of the round plastic boxes will have a ground screw connected to a metal sleeve for one of the screw mounting holes for this reason. They do make round plastic covers. _____ Answers based on the National Electric Code. Always check local amendments. Reactions: NJMarine, Code05, .Contact them, tell them the quality is bad. They probably had to go to a new manufacturer to make the new boxes and of they get complaints they may switch to a better one. Or maybe they'll choose profit, they are a company after all.
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Learn what metal fabrication is, how it evolved, what processes and technology are used, and what types of metal products are fabricated. This article covers the definition, history, process, .
why did they decide plastic junction boxes are ok|plastic electrical box cons