Questions tagged [conduit]

Electrical conduit is used to protect electrical wires, when a simple jacket alone is not enough. Conduit may be metal or plastic (PVC). Use with the [electrical] tag.

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How deep should liquidtight flex conduit be burried?

How deep should liquidtight flex cable be burried for a 75 ft run for an outdoor circuit? I see pvc conduit is at 18 inches.
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1k views

proper way to run conduit on top of siding

I'm looking at running a new main line to upgrade my electrical service to 200 AMP and using some 2" metal conduit run horizontally for 12' on a sided house. What's the proper way to do it? This ...
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1answer
458 views

Running wires through conduit on outside of house to feed garage sub panel

My electrical panel is in the basement on the west end of the house and my garage is on the east end. I had planned to run a 6/3NM-B cable along the joists and through the rim joist to get into my ...
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1answer
2k views

50 amp RV outlet installation

So, I'm planning the installation of both a 50A RV outlet and an adjacent 20A GFCI 110v outlet on the back wall of my residence. I have separate 50A and 20A breakers and will use 6/3 and 12/2 romex ...
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1answer
1k views

Running wire into a shed some distance away

I'm wanting to run wires underground to my shed from the house. Run is 85 feet I have a 30amp breaker in the house for the shed. I'll have need for one 240v outlet and several others for 120. I'...
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1answer
2k views

Ground wire with 1/2 EMT Conduit

Do I need to run a ground wire with conduit? I have installed a line of lights using 1/2 EMT and tied into another circuit that is grounded coming off the panel. There are about 7 lights in a ...
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4answers
2k views

How do I bend EMT conduit to a broader radius?

I work a lot in EMT conduit. I have a 1/2" conduit bender that bends to a 5" radius, and a 3/4" conduit bender that gives a 6" radius. I also find bent pieces of conduit around the lodge that have a ...
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2answers
68 views

How to connect steel posts to build a shelf unit?

The posts or conduit needs to be galvanized as I'm using this for growing herbs. Im not sure if I would have to get this welded or if theres a simpler way to put something like this together. (...
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2answers
7k views

Transition PVC outdoor conduit to EMT

Code jurisdiction: USA, current NEC and IBC with no addendums or modifications relevant to residential construction. I am wiring up an outbuilding to the house and using 1" PCV conduit for the ...
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5answers
409 views

How can I find a stud from the exterior to mount service mast?

I'm changing the location of the electrical service mast on my house. Is there an easy way(s) or a trick of the trade to find a stud from the exterior of the house so my lag bolts that will hold the ...
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2answers
9k views

Wire Size for Long Run

I am building an RV campsite at the bottom of my property to live in while our house is under construction. The RV requires a 50 amp service. I want to install a 100 amp sub-panel down there to give ...
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1answer
98 views

How can one make a connection where flexibility is necessary despite the connection being exposed to physical damage?

It seems that it is common practice in HVAC-land to use a LFNC whip to connect air conditioner condensing units to the house wiring. However, as statueuphemism rightly points out, it is eminently ...
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1answer
342 views

Is it okay to use an LFNC whip to connect air conditioner where subject to physical damage?

I have seen many air conditioners at ground-level in multiple cities near me that are connected using liquid-tight non-flexible conduit (LFNC) whips. Example: http://www.southwire.com/products/whip-...
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0answers
93 views

Tool to cut small diameter PVC tubing/conduit?

Goal I want to cut a lot of 1/2" inner diameter PVC conduit (the gray stuff, not white). Caliper measured 15mm ID, which is really 0.6", but I think it's sold as 1/2", or maybe the fitting are sold ...
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1answer
2k views

Adding a new “knockout” to side of main electrical panel

I'm planning on running a 6/3 feeder cable from my main panel to the garage for a small 50A subpanel and am unsure of how to plumb the new cable to the main panel. All of the knockouts are on the ...
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3answers
3k views

Using receptacle mounting screws for ground connection

I will soon be adding some outdoor wiring using weatherproof metal boxes and EMT conduit. I noticed when I was playing around with a multimeter that without a ground conductor between a receptacle and ...
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1answer
1k views

Sizing grounding conductor for multiple circuits in conduit

If I have two sets of conductors (two unbalanced 120V circuits) in a conduit, can they share a ground wire and if so, is the ground wire sized by the minimum ground wire sizes for the sum of the ...
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1answer
224 views

Securing Cables at Ends of Conduit Run

As a follow-up to this question, if I have wet/damp location-rated cables going from an outdoor breaker box, up a ~5' SCH40 PVC conduit, and into a building attic, do I need to secure both ends of the ...
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Running NM-B in PVC SCH 40 Conduit from Outdoor Breaker Panel

For space-saving reasons, I have outdoor breaker panels, and most of my branch circuits are wired through the attic down to individual outlets. Currently, the wires run through the wall from the ...
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2answers
964 views

Drill From 1st Floor To Second Floor

I am wiring my home with Cat6 and I have my 1st floor wired thanks to tips used from users on this forum! Well now, I need to go between floors! I have found a location that is a straight shot up, ...
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189 views

Is ideal clear pulling lube okay for pvc conduit

I'm pulling NM 6 gauge 3 conductor (plus ground) through a 1 inch pvc conduit. I'm wondering if Ideal Clear pulling lube is okay. It says it's okay for all wiring types, but not if it's okay for all ...
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3k views

How many 12-2 cables can I put in a short run of conduit?

I am putting in a few new outlets in an enclosed patio, running a new circuit through the attic using 12-2. I would like to go from the panel to the first outlet, then to the second and then the 3rd. ...
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2answers
578 views

Reducing 1 1/2“ conduit to 1/2” liquid tight

I'm running multiple wires through the same PVC conduit pipe (1.5") that need to exit into flexible liquid tight that is (0.5"). I'm not seeing any reducers for doing something like this other than ...
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2answers
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Cable securing/support, conduit, etc when exiting main service panel: questions

I'm totally confused by this. Looking for any help that anyone can provide. I've attached a photo of the top of my recently-installed (inspection passed) service panel. The top of the panel sits ...
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2answers
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What size wire should I use for my yard shed, and how deep should I bury it?

I'm planning to build a shed next spring, and want to make sure my thoughts on power are correct. The shed is about 100' from the house, with another 20' inside the house to get to a subpanel. All I ...
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1answer
349 views

is fire alarm system conduit color clearly identified on NFPA or UFC?

Inspector says that I have to use red emt conduit for fire alarm system. I want to prove that it doesn't specified in any standarts.
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1answer
130 views

Easiest & NEC 2011 compliant way run wire into attic?

I have this surface mount wiring connected to an outlet through the bricks (bottom-middle in photo). I would like to branch from this to add a switch (through bricks) and go straight up into the ...
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1answer
49 views

Running 8/3 along strongback

I'm running a 220(240) 8/3 line for a table saw in my garage. I can fish the 8/3 to the box. I need to run the line to the other end of the garage. The other lines are run down the 1.5" side edge ...
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2answers
5k views

Is a conduit required or recommended when running SER wire in unfinished space?

I'm planning on installing a 100amp sub panel in the garage. The garage is right around the corner from the main load center in the basement, but part for that path goes through the stairway from the ...
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1answer
217 views

How to run low voltage wire from one side of kitchen hood to the other?

I need to run low voltage wire for under cabinet lighting from one side of an exhaust hood to the other. I would like to install a conduit so that the wire can be pulled later in the project (after ...
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2answers
736 views

Running conduit between basement and 1st floor

My basement is currently unfinished but within the next few months we plan on finishing half of it as living space. Before the framing and drywall goes up I want to run a conduit between the ...
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1answer
102 views

Adapting an outside wall outlet to suface mount conduit?

This was a previous question with some great answers. How can I adapt a wall outlet to suface mount conduit? One answer was: "There are collar boxes available that have conduit KO's (knockouts). Just ...
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4answers
611 views

How one is supposed to “plug” a conduit running from basement to attic?

I'm going to install a 2" conduit from my unfinished basement into the attic, through the first and second floor. It will be used primarily for getting Cat6 cables into upstairs bedrooms. 2" diameter ...
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1answer
561 views

Where can I find straps or hangers to secure/support FMC?

I am looking for products to secure FMC (flexible metal conduit). I am having trouble finding any straps or hangers larger than trade size 3/8" that are labeled for anything other than EMT (electric ...
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1answer
274 views

Is there such a thing as a backless junction box/conduit fitting?

I have a battery enclosure for a small off-grid solar installation, and I want to run the battery cables out of the enclosure to the DC breakers and inverter. I'm looking for a backless junction box ...
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1answer
3k views

PVC electrical conduit connection to service panel

I am installing an outdoor conduit that consists of four #8 AWG THHN wires inside gray 1" PVC. I need to hook it up to the main service panel and I am not sure what's the best way to do it. I ...
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2answers
18k views

Conduit Size for Sub-Panel run?

I have old overhead wires that go between my home and a detached garage. The plan is to remove the overhead wires and install a new sub-panel in the garage with an underground (PVC 80) run between the ...
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2answers
1k views

Hanging EMT conduit exterior to home

How high does exposed EMT have to be from ground running down side of home?
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1answer
4k views

Is PVC conduit OK above ground to hook up a Jacuzzi?

We are hooking up a Jacuzzi and need to run # 8 wire above ground What PVC should we use to run under our house to get to the back yard? I have read Schedule 80 PVC will work.
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1answer
988 views

Non-metallic conduit support on horizontal surface in inaccessible space

NEC says I need to secure 1" nonmetallic rigid conduit (Schedule 40 PVC to be precise) every 3 feet, which makes perfect sense when it is hanging between supports horizontally, across joists, or on a ...
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3answers
993 views

How to connect metal conduit to in-wall NM cable?

I have NM cable in metal conduit running along a wall. At a corner, the conduit enters wall space, and ends at a metal box in the wall. The line is continued by in-wall NM. How should I handle the ...
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4answers
7k views

What diameter PVC conduit should I bury under my front yard?

I'd like to run two 20A circuits to the other side of my front yard. I'll be using 12AWG THWN conductors, over a length of about 20 feet through PVC conduit buried at a depth of 18 inches. What ...
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2answers
88 views

What conduit should I install underground that meets code?

I want to run a conduit under my front yard about 20 feet. I will be trenching to 18 inches deep, but was curious what the easiest conduit is to install that meets code? PVC? EMT? Liquidtight?
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448 views

Commencement of Rewiring Room with EMT conduits inside the walls

I am rewiring an old house (50s) with romex to have the flexibilitiy to run it outside conduits when necessary and to further protect the wire from creatures plus making it easier to upgrade in the ...
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3answers
7k views

What size conduit should I use for Coaxial and Ethernet?

I'm looking at feeding both a coaxial and an Ethernet(probable cat6A) cable too multiple locations in my house shortly. I was wondering what size conduit should I use?
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2answers
2k views

How do I install EMT conduit for an outdoor 6/4 power run?

I need to run NEMA 14-50 50A outlet from the breaker show to the garage (approximately 30') . From the red line, I plan to run 1" EMT conduit as show in the picture, four #6 wiring inside, 50A breaker ...
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1answer
352 views

Requirements for adding outdoor outlets

I would like to run a line of outlets on the front side of my house. Ideally there will be: 1 circuit of outlets that are always on for general use 2 circuits of outlets that are on timers, one for ...
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1answer
503 views

Adding ground to an existing conduit

Continuing my basement shop brainstorming... As I said in another question, the good news is that I've got a 30-amp 240V circuit more or less in the right place and available, and easily accessible ...
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2answers
905 views

Running LV conduit through attic - what do I need to know?

I want to run 1" LV conduit (Carlon Resi-gard) through the attic. Basically, I am using the attic for the "horizontal" run from one room to another. I will be sealing the hole with some caulking, ...
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4answers
46k views

How many CAT6 cables can fit in 3/4 conduit?

I was planning to get 3/4" conduit (Carlon ENT/Smurftube) to run network cables through the house. Just how many CAT6 cables can safely fit into 3/4" conduit?