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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3
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2answers
591 views

EMT to Top of Panel

I'm installing a NEMA 14-50 in the garage with a dedicated 50amp breaker. I have run the 6/3 romex through the attic and am at the point where I'd exit the attic to the exterior of the house and down ...
3
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1answer
6k views

Pulling wire through EMT and PVC conduit

I'm running two circuits outside to other side of yard. I don't have much experience pulling wire so I wanted to make sure I'm doing it right. I have stranded and solid 10awg. I purchased both not ...
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1answer
137 views

constructing mechanical chase

I'm thinking about putting a mechanical chase in my home to connect the roof to the garage. The chase would contain the flue for water heater and furnace, and possibly a dryer vent (separate from ...
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4answers
1k views

Using PEX as wire conduit

I have some 1/2" PEX-AL-PEX left over and thinking about using it as conduit for ~20' ethernet or phone cable. Pipe is appropriately orange. Will the aluminium layer provide RF shielding? (assuming I ...
1
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2answers
8k views

How many 14/2 romex cables can I put in a 1/2 pvc conduit?

How many 14/2 romex cables can I, according to NEC (or safely), put in a 1/2 pvc conduit? For background: the conduit will be buried until surfacing in a junction box; using burial-rated "romex"black ...
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1answer
92 views

How do I couple IMC underground?

The title, more or less, sums it up. I plan to bury some THHN/THWN-2 feeders, and my jurisdiction allows a 6" bury depth if I use IMC or RMC. I plan to use IMC, which comes with both a male and female ...
0
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2answers
644 views

Unistrut Spacing - Electrical Conduit

When suspending electrical conduit from the ceiling in a warehouse (EMT or Rigid), that runs perpendicular across unistrut, how far apart are the unistrut allowed to be? What type of conduit is ...
2
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1answer
184 views

How can I trim around flexible tubing coming through drywall?

I have what I believe is referred to as ENT conduit (smurf tube?). How does one terminate this type of conduit where the tube meets the drywall? I was looking for some sort of grommet, but I can't ...
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3answers
1k views

What material to use to close a too wide wire tunnel?

During the cold days I noticed a little draft coming from the light switch next to my house door. Removing the switch revealed that the tunnel for the cables was widened to fit the cables for the ...
5
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2answers
232 views

Can I cut the protruding conduit to the floor level and cover it with junction box?

I've removed the old island which had the electric range, with the conduit coming from the crawlspace: The junction box was attached to the back of the cabinet holding the range. But the new island ...
1
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1answer
838 views

Fastening THHN cable in junction box

I am installing an electrical subpanel in my garage and have a 2" PVC conduit run up approximately 5 feet from the panel through the ceiling to the garage attic. In the conduit i ran 2 12/2 NM romex ...
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1answer
959 views

interpretation of conduit vs raceway wet location vs outdoor vs NM NM-B

eventual question: for a sealed PVC conduit external to house, does that qualify as a wet or damp location preventing use of non metallic (NM or NM-B) indoor type wire? And does underground feeder (...
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0answers
213 views

When do you use an aluminum vs PVC service entrace cap (weatherhead)?

When installing an overhead power service entrance, you can choose between metal conduit with a metal weather-head, or PVC conduit with a PVC weather-head. Is this 100% a matter of preference, or are ...
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2answers
3k views

Can Cat 5 cable be run in metal conduit?

I want to run Cat 5 cable along the side of my home in 1/2 in. EMT Conduit. I was considering actually pulling to Cat 5 cable in that conduit. Will this cause any problems on a 100Mbps connection ...
3
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3answers
222 views

Can I split off a 20a with a conduit body?

So I am coming out of my subpanel with 1/2 in metal conduit and using metal handy boxes with NEMA 5-20 for all the receptacles on my two indoor branch circuits. One is dedicated for a window unit AC. ...
12
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6answers
42k views

Why is ENT rarely used for electrical wiring?

As best I can tell, the National Electrical Code 2011 allows electrical non-metallic tubing ("smurf tube" or ENT) to be used for running 120 V electrical wire. But everywhere I look, I see remarks to ...
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2answers
245 views

Running conduit near knob and tube wiring

I have some new AC ducts in our new house that will soon be concealed behind new drywall, but before the drywall goes up, I wanted to run some conduit from the upper floor down to the basement for ...
1
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2answers
9k views

EMT or PVC Conduit For Exterior Above Ground Electrical Run

I'm installing a garage on the side of my house furthest from the electrical box. I don't want to trench the entire distance (60 ft), so I am planning on running conduit along the exterior of my home ...
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2answers
1k views

What Size Conduit for 4AWG

I'm running a 60 amp circuit to provide power to my garage. It is about 70 ft in length, so I think I need to go with 4AWG to counter any resistance loss. I'll be pulling 4 wires (R,B,W,G) thru ...
2
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1answer
875 views

Why is my emt 1/2" conduit offset bend off?

I used the Klein shrinkage calculations on the handle. For example for a 3 inch offset bend, you use 6 inch from point A plus 3/4" or 6 3/4" for point B. So, why is it when I bend it, that it is 4" ...
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2answers
315 views

Installing vertical EMT conduit crossing a horizontal eletrical run

The room i want to install some vertical EMT (for data cables) has a horizontal electrical wire (romex or something like it), about 8 or 10 inches from the floor, going across the entire wall as near ...
6
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5answers
1k views

Ground-level electrical wiring to shed outdoors possible?

I was telling an uncle about the concern of digging a conduit trench in my heavily planted garden (trying not to disturb the plants) to run electricity from the house to the shed about 35 feet away. ...
0
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1answer
62 views

FMC run for GFCI receptacle?

I have a water heater room 5x8 that needs a GFCI receptacle added to the ceiling for a hot water recirculating pump. The heater is large and obviously hard plumbed in so cannot be moved and rigid ...
2
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1answer
254 views

Are dedicated neutrals required in conduit?

I am wiring a new screened in porch to include a receptacle, ceiling fan and 2 light fixtures. I am tapping into an existing 20A circuit. The starting point is 12/2 coming into a 3 gang box. The ...
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2answers
106 views

conduit and wire size needed

Looking to hook up a new 20KW generator to an existing manual 200A transfer switch. What size copper wire do I need (2 hot legs, 1 neutral and one ground) and what size PVC conduit do I need for all ...
2
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1answer
432 views

Find exit point/path of conduit

I'm installing an air conditioner above a bedroom window, but there's no electric outlet nearby. I'm to avoid running wire along the wall, and I noticed that the light fixture receptacle has an empty ...
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4answers
7k views

Why would you use copper electrical conduit?

This is not "home" improvement per se, but it fits the spirit of this stack exchange. While waiting for my train I was peeking into a ceiling that had all of its slats removed for some kind of ...
5
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2answers
714 views

OK to reposition a 90 degree sweep of Schedule 40 conduit after it's been glued?

I've installed 2" Schedule 40 direct burial pipe from power pole to power pole so that AT&T, Comcast, & Wave aerial cables can be run underground instead. I've completed the conduit ...
1
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1answer
700 views

How should I repair a broken exterior PVC outlet body?

We bought our new house back in June. I was doing some mouse-proofing this weekend and found this beauty: The wires are going out to our pool. Any suggestions on how best to approach fixing this? ...
3
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3answers
2k views

Can I use Schedule 40 PVC to protect a grounding electrode conductor where exposed to physical damage?

Can I use Schedule 40 PVC to protect a 4 AWG grounding electrode conductor (wire from main panel to grounding electrode) where exposed to physical damage (a few feet between the panel and the ground ...
2
votes
5answers
497 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 ...
3
votes
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 ...
3
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1answer
141 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 ...
0
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1answer
430 views

Is it ok to run 2 NM-B cables in 1 EMT protective conduit in an unfinished basement? [duplicate]

I would like to add 3 new 20 Amps outlets in my unfinished basement. I'm going to run some NM-B cable along the ceiling joists and I will use metal boxes attached on the concrete walls as well as use ...
0
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1answer
108 views

Code compliance of running EMT on exterior of exposed chimney inside

I am working on a 1920s era home with an exposed brick chimney inside. The chimney is not connected to a fireplace but is used to vent the water heater and furnace in the basement. I am currently ...
2
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2answers
8k views

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.
3
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1answer
518 views

Does code allow daisy-chaining these surface outdoor lights?

The two lights shown in the photo were fed from a junction box that was destroyed when a truck backed into it. I'm thinking of running new conduit above vehicle level, and the most straightforward ...
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2answers
2k 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 ...
0
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2answers
11k 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 ...
2
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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 ...
2
votes
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'...
1
vote
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 ...
7
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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 ...
2
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2answers
4k 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
8k 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 ...
6
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5answers
18k views

Does a grounding wire from a breaker panel to an outside grounding rod need to be in conduit?

I've got a breaker panel in my detached garage (it is not a sub-panel, but is a primary forked off just past the meter). The panel seems to be wired correctly- the neutral and ground bars are tied ...
2
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1answer
107 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 ...
1
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1answer
389 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
98 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 ...
2
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1answer
2k 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 ...