site mikeholt.com non metallic floor box in slab I have used several different types of floor boxes in the slab. Lately the receptacles for the chairs have been under the chairs, so we left the threads of the IMC conduit above slab and surface mounted our boxes. Standard electrical box screws typically have a diameter of #6 (3.5mm) or #8 (4mm). For smaller junction boxes, #6 screws with a length of 0.75 to 1 inch (19 to 25mm) are .
0 · concrete slab floor boxes
1 · concrete slab floor box problems
Clever use of antique metal file boxes - side table with storage.love the look!
I will be installing floor boxes in a Chiropractic office. According to 517.13 wiring method has to be in metal raceway or sheath. I was planning on using PVC schedule 40 to a non metallic floor box in the concrete slab. I have a few of the FBBOX-GY floor boxes going in. This is my first time doing it for a concrete slab. The slab on grade assembly is dirt - 4 inches crushed. Hello, I have a customer that installed round non-metallic Carlon floor boxes into concrete (above grade if that matters). The inspector is claiming that these boxes cannot be used because they do not carry a fire rating. The boxes are sunk into the floor but do not penetrate through the floor.
I have used several different types of floor boxes in the slab. Lately the receptacles for the chairs have been under the chairs, so we left the threads of the IMC conduit above slab and surface mounted our boxes.
Most floor boxes are more for electronics, Television, TV cable, VOP, or internet and the power is usually a nasty second aspect IMO! Be sure to check the Architectural Finish Schedule drawing for what is the type material that will be used on the floor!Residential Round Non-Metallic Floor Box offers an economical solution for electrical power or a combination of power and voice/data applications. Designed specifically for slab-on-grade installation. Quick and easy installation is assured using a . ok i see in 517.13 about cable having metallic armor or sheathing. we have a dental area on the first floor where the contractor has run pvc in the concrete slab under our space. is there anywhere that the code mentions about concrete slab. thank you
Customer wants 2 floor receptacles in a new slab. Wood flooring will go on top of the slab. All the floor boxes I have located (T&B & Wiremold) are out of stock in my area. My customer, who was an electricain 20 years ago, thinks I can run a PVC conduit to a mud box. I've used mud boxes in block walls but I don't think they can be poured into a . 314.27 Outlet Boxes.(B) Floor Boxes. Boxes listed specifically for this application shall be used for receptacles located in the floor. Exception: Where the authority having jurisdiction judges them free from likely exposure to physical damage, moisture, and dirt, boxes located in elevated floors of show windows and similar locations shall be permitted to be other . My comment was does any one sleeve a ufer ground or a concrete encased electrode. I kindly asked for him to site the code article. No replay as of yet but will let you know. I was not able to find anything in the code that would prohibit the grounding electrode conductor coming through the slab under the panel. I appreciate you comment Marc a fine example of one trade pressing a product gaurantee stipulation while screwing another trades ability to keep cost in check (ie using the spec wiring method). mean while, i bet every other trades bolck outs will not be flush. granted, its not too hard to plug the ent to facilitate flush stubs- it will just raise the time for each stub .
The floor outlet plate did not extend over the edges of the box-- it fit inside the box so we had to be right on. I think there was only an 1/8" play and we had 40 of them in a house-- what a nightmare
concrete slab floor boxes
floor boxes in slab. Thread starter buck33k; Start date May 5, 2016; Status Not open for further replies. B. buck33k Senior Member. Location Washington state and North Carolina. May 5, 2016 IMO Forget using a metal box and 'shooting' the height, it is a major pain in the rear to get them dead on. Use a PVC floor box, you do not need to set the height of these. Once the finish is done you cut the extra off with a sawzall blade and install the device and plate.
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If I recal right, lfmc condit is required a bonding bushing, even for non metallic boxes, or you have to have a ground cable inside the conduit! Though some do both. These various cables in the box would all be connected to each other to keep the ground current as one item. If this was done inside the junction box, the junction box does not . A customer has a number of 3/4" PVC stub ups inside a building with a 6" cement slab. Originally these conduits were for floor mounted open case coolers for produce etc. Now the customer wants floor receptacles in place of the stub ups . If the box is under a slab inside a building and is in contact with the earth -- true, However, Inside the box would not be considered a wet location . gadfly56 Senior Member. Location . The floor in the room is dry location, but the box is in contact with a wet location. The wet location does not extend beyond the base of the flooring and .
its a flat metal stake about 16" long and is used to secure the keyway in the slab. it has a notch on the end that attaches to the keyway and you hammer it into the dirt. i bend them in half over my knee and put it over my pipe. . #7 chevyx92 said: I have a job starting soon that will have 70 floor boxes in the slab. Most are just power and a . Re: EMT in concrete? UL web site. Electrical Metallic Tubing Guide Information for Electrical Equipment for Use in Ordinary Locations GENERAL This category covers electrical metallic tubing manufactured in trade sizes 3/8 to 4 (metric designators 12 to 103) inclusive for installation of conductors in circuits rated above or below 600 V, nominal, and in accordance . What is the lifetime of a non meatallic box vs a metal box? Next ? Without using gangable boxes can I get a 3 or 4 gang box? Thank You . JohnJ0906 Senior Member. Location Baltimore, MD. Aug 16, 2007 #2 I would think that either would outlast the wire insulation. mikeames Senior Member.
concrete slab floor box problems
My new project begins in 2 days. I have 9 floor boxes going in at various places throughout a 12,000 sq ft slab. My normal procedure would be to stand guard over them - the concrete guys have no mercy. I have so many locations for this project, I need to find a method to sturdy up the boxes so that they don't move on X,Y or Z axis. Re: Floor Box With Water Breaker Does Not Trip This is a little off subject, but we have had more than one occasion where a splice or nick in a conductor in an underground raceway or handhole/manhole has caused the whole ting to become a boiling cauldron where the lid and frame became too hot to touch, where steam was literally belching from the openings in .
If you had a job that allowed conduits in a slab how do you decide which systems such as feeders, lighting, wiring devices, HVAC etc. you would put in the slab and which you don't. I imagine apce is a consideration and depth of slab. Lets say it is a 24" slab. Thanks. Installations underground or in concrete slabs or masonry in direct contact with the earth; in locations subject to saturation with water or other liquids, such as vehicle washing areas; . The location of the floor box is a dry location by NEC definition IMO that is pretty clear, a wet location would require a WR listed receptacle and an in .
a) Products must be suitable. Floor boxes are not designed for 'wet' locations- only to exclude minor amounts of mop water; b) The need to follow manufacturers' instructions. If they wanted the boxes filled with goop, they would have provided it with the box; and, c) The requirement to use listed materials, as intended, for our wiring methods.
Specifications asking for any kind of box, including non-metallic boxes, but a little note in the plan says we have to use "cast FD box". It does not say metal, or cast iron or aluminum. I know "cast" is normally referred to metal boxes, iron or aluminum, but my question is if also you can consider a PVC box as "cast" by definition, because it . Is this like a slab that has been furred up to accomodate the wood floor. What is underneath? If it is a slab you can jackhammer the slab where the box is just enough to get a box in. . Steel City has a pair of metal OW boxes, that are 2" deep and have a 10.5 cu-in volume, which would allow a 14-2 and a device. They are the #LXMWOW (NM cable .
hello everyone! I'm looking for article and a section to a following code qwestion:a recepticle outlet installed in the concrete slab floor,of a patient care area,in a dental clinic.if you could help me to point me to the right article i would appriciated .thanks bill ENT - Electrical Non metallic tubing, is a raceway that was introduced in late 80's, is a corrugated flexible PVC raceway. Carlon happened to be one of most popular brands out there and their standard product is about same color as the "Smurfs" and where the slang field name "smurf tube" comes from.
You said smurf tube is under 356 as liquidtight flexible non metallic tubing. 356.6 states that LFNC will be listed as liquidtight. Smurf tube is not listed as liquid tight. . Ent snuff tube we put in slabs for floor plugs not intended for other uses. I ran some for an atm pad and into the little dog house up yo the panel .
Boxes recessed into the poured concrete floor often have upward-facing receptacles, but I've never seen a monument or doghouse box that does. If you're digging up the floor to run the conduit, why not dig a little more and use a PVC floor box. They make ones that you can trim flush after the concrete sets. Why does the socket have to face up? Can anyone guide me to the code book article on grounding light fixtures. I have some vanity lights and ceiling fixtures coming from non-metallic boxes which aren't grounded to the metal crossbar. I am just curious if this is new practice to by pass the grounding screw on the crossbar. Or should I go into these fixtures and correct my findings?
My understanding is that because it's <250V and non-service, the connection at the garage subpanel alone would be sufficient even with concentric KOs. Also said I need to bond the EMT between the non-metallic PV combiner and the non-metallic jbox on the roof. I think that one is valid. It's more previous only I'm unsure about.
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The F100 frame measured .171" thick and the F250 frame measured .200" thick..a .030 difference between the two. I did a search online for a chart to convert these measurements to 'gauge' readings, and the conversion charts I found showed that the F100 frame would be app. 7-gauge steel whereas the F250 would be app. 5-gauge steel.
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