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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88 views

Is the blue conduit connected to my sub-panel suitable for a 50A branch circuit?

I have to add a 50 amp circuit to the sub panel in my garage. I found one of the open knockouts in the top of the panel to have a blue flexible conduit looking stuff in it which runs up into the ...
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1answer
128 views

Gap in conduit running to electric meter

There's a gap in the conduit running from underground to my electric meter. I'm sure that's a problem, since weather could get in. It appears to be PVC. The question is: Can I service this myself, ...
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331 views

Using conduit from ceiling to wall for closet switch?

We're adding a wall to separate a garage and want to put outlets and a light switch in the wall but it was installed aligned with a steel beam above it so there is no way to fish a wire down into the ...
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2answers
269 views

What type and size conduit should I use for my service entrance cable?

I am running my aluminum service entrance cable from the main panel to a sub panel in my garage. It runs from the garage under the house then out the wall, makes a 90 degree turn to go into my side of ...
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2answers
81 views

how to run conduit past/over wide stone foundation

I'm planning to run 1" conduit to power an outdoor sauna. In digging the trench, I discovered that my old stone foundation runs outwards from the house. That is, while the inside cellar wall is ...
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2answers
2k views

Does PVC conduit need a termination bushing at a service panel?

I'm installing a panel with the feed conductors entering via 1-1/2" PVC. Is an end bushing, as shown here (for example), required by the U.S. NEC for PVC? image source
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1answer
65 views

Individual conduits for each phase to reduce amount of stud being drilled

I'm trying to do some improvements on an existing structure that leaves me little room for maneuvering. I'll break it down as simply as possible. I have two large PVC junction boxes (completely ...
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2answers
589 views

Relabeling 6-AWG Wire

I'm pulling 2 hots, 1 neutral and 1 ground through conduit to a subpanel and I was wondering if it's possible to use the same color wire and just relabel the endings. I was thinking of using 6 AWG ...
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2answers
40 views

Metal or PVC Conduit in Metal Outbuilding?

I'm running wiring under ground from main panel to 100 amp panel in metal garage. When installing lighting and receptacle circuits mounted against interior walls, does it make any difference what ...
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3answers
712 views

How to splice into existing underground rigid metal conduit below ground and hide junction box?

I have an existing rigid metal conduit run from the service panel to a junction box location that was previously powering an outdoor appliance. The circuit is 20A and running 12 guage wire. The RMC ...
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1answer
320 views

Attaching conduit to fence

Can I attach pvc conduit to an existing chain link I am installing a storage shed and I don’t want to dig a ditch
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156 views

Running AC/MC cable in boiler room, do I need additional metal conduit?

I'm planning to run AC cable (or MC, not sure which is better) in my basement to install an outlet near the boiler room. the cable that powers the boiler has sections that are inside of a rigid metal ...
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2answers
88 views

Mixing PVC Conduit Schedules

I grabbed sched 80 heavy wall PVC conduit for my run to the shed, but later noticed the elbows are sched 40. Is it legal to use them together (mixed in the same conduit run) in the trench or anywhere ...
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3answers
740 views

EMT Conduit Capacity with Mixed Guage

I want to pull two circuits through 1/2" EMT. Three of the wires would be 12AWG and other three 10AWG. I've found a couple of tables that say I can run 5 10AWG or 9 12AWG. Is my mixed gauge set safe? ...
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1answer
581 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
82 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
98 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
713 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
162 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
49 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
2k 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
186 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
335 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
51 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
1k 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
253 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
2k 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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36 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
474 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
596 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
382 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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58 views

Service Panel and New Underground Conduit

So im remodeling and found out my electrical conduit that carries my lines from the my garage was rotted out. I had exposed electrical wires, still wrapped in sleeves, but exposed buried in the dirt. ...
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1answer
85 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
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 ...
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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
93 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
142 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
233 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
844 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
965 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
214 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 ...
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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. ...
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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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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 ...
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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
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 ...
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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. ...
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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 ...