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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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254 views

PVC conduit into PVC box: Can I make it watertight when using a threaded fitting? Are sealing locknuts allowed?

I have some 2" PVC conduit coming out of the ground and into a PVC box where it enters with a terminal adapter and held in place with a locknut. I intended to use a sealing locknut to keep the box ...
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4answers
67 views

EMT Conduit Strapping to a Narrow Joist

I going to run 1/2" EMT conduit on the bottom of a joist. The standard straps I have are too wide to get both nails/screws in. I would prefer to run the conduit down the center of the joist. I wouldn'...
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1answer
74 views

Run 6 AWG NM-B cable through 1 1/2 PVC pipe indoors

I am running a 6/2 NM-B Romex for approx. 45 feet from my service panel to my garage for a wall charger for an EV. No unfinished space in basement and and garage wall is on concrete slab of garage, so ...
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1answer
431 views

Narrow conduit with 90 degree elbow - three thhn wires

Currently the narrow conduit (1 inch outside, so inside maybe 3/4 inch) has 2 wires (hot and hot switched). I want to include one neutral so I can change to a light switch outlet combo. It is an old (...
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2answers
153 views

Narrow conduit (old building), need to run 2xhots, 1xneutral

Currently I have two wires running through the conduit: one hot (coming from box), and one hot switched (on/off according to light switch). I would like to convert it to an outlet switch combo (one ...
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1answer
38 views

how to replace surface conduit for a two-wire lighting circuit?

I have an old house with unswitched knob-and-tube running to a ceiling fixture. Previous owners ran surface conduit to a wall switch and to a second light fixture over the sink; none of this was ...
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1answer
1k views

125amp feed from garage to house, required wire size, PLUS a separate 3-way light switch

I recently built a detached garage with its own 200amp service. I made provisions to run a 125amp feeder from the garage to an addition we are now building on the house. My questions are: What size ...
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1answer
102 views

Run conduit from exterior sconce

We have a sconce on the outside of our brick house on a covered patio currently. I would like to run conduit from it to allow us to place an exterior fan on the same covered porch. My questions: 1) ...
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1answer
211 views

Can conduit just be left laying on the ground?

My contractor ran a 220V line from a box in our garage, through the rear wall of the house, to the rear kitchen wall to power the microwave and oven. Although the wires are encased in a PVC conduit, ...
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1answer
43 views

Outlet to conduit junction recommendations

I've got a recessed outlet box on the outside of my house. To be more specific the outlet (when removing the weatherproof cover assembly) is flush with the stucco. I need to decommission this as an ...
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1answer
822 views

Code compliance - how do I pass EMT conduit through an interior wall?

I live in Fairfax, Virginia. I need to know how to pass 1/2 inch EMT conduit through an interior wall while complying with code. In more detail, I have a subpanel in an attached garage. From that ...
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1answer
213 views

How to install drywall over electrical box connected to rigid conduit?

I'm trying to figure out how drywall is supposed to be cut out to go around preexisting electrical boxes that are attached with rigid metal conduit. The conduit is the ground path. My dilemma is if I ...
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2answers
1k views

THHN versus NM for conduit wiring?

I am wiring a small workshop, using conduit. I was shocked to see how expensive THHN/THHW cable is, with respect to NM-B: at local big-box store, 100ft of 14/2 NM was $33, whereas 100ft of THHN was ...
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0answers
33 views

Repairing earth link to conduit

The wiring in my property uses the conduit as the earth. I've checked the earth resistance and have no problems there. Unfortunately some of the ceiling lights are not properly grounded as the tabs on ...
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1answer
401 views

Gap (2") between PVC conduit and exposed foundation (exterior)

I can't figure out how to get a good photo of this setup, so I'll try to describe as best I can. I'm moving/replacing the existing overhead electric cable that runs between the main house and the ...
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2answers
408 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 ...
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1answer
340 views

Is it within code to run ent conduit into a junction box on the exterior of the home?

I am in the construction process for a new home. I asked the Low Voltage Contractor to run conduit to about 13 places inside the house. In addition to that I asked for a run to the exterior of the ...
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1answer
73 views

Speaker wires to outside covered deck

If the picture loads you should be able to see what I’m talking about. I’m looking to move the 2 speakers that are mounted to the back of my garage over to the covered part of my deck. I would like to ...
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1answer
105 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
807 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 ...
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2answers
6k 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
76 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 ...
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1answer
103 views

Find The Other End of Service Conduit

On our property we have a main house and an 800 sqr foot detached "guest house". To the right of the entrance to the guest house is the electrical service / meter. The wires for the electrical service ...
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2answers
201 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 ...
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1answer
646 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
728 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
137 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
2k 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 ...
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3answers
189 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. ...
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1answer
158 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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2answers
988 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 ...
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2answers
7k 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
264 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 ...
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5answers
891 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. ...
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1answer
58 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 ...
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1answer
198 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
96 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 ...
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1answer
5k 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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2answers
671 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 ...
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3answers
9k views

Cat 5/6 in same conduit as power: is NM-B required, or is THHN acceptable?

Preface: I'd like to avoid the question of whether one should run data and power together; my question is focused on Code compliance. I'm trying to ensure I interpret Code correctly when running Cat ...
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1answer
570 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? ...
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1answer
365 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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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 ...
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1answer
378 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 ...
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1answer
98 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 ...
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3answers
378 views

What tools do I need to cut flexible metallic conduit?

I need to cut 3/8" flexible metallic conduit and am looking for suggestions on how to cut it (i.e. Conduit Tubing cutter, hacksaw). How do you smooth the edges that were just cut? I have a 7 foot ...
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1answer
790 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
506 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 ...
3
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1answer
452 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
6k 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.