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 should I add EMT conduit before drywall?

I want to have my electrical upgraded to 200A which involves adding multiple new conduit runs. My garage is currently unfinished and eventually walls and ceiling will be covered in Type X drywall. I ...
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What size wire in conduit before feeding 20A nm circuit?

I want to run five 20A 120V circuits and one 20A 240v circuit from my panel (13 circuit carrying conductors, 6 grounds), through a 25' long conduit in my crawlspace, to a junction box where I then ...
user3213456's user avatar
11 votes
2 answers
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Run single strand of K&T wire through conduit under floor?

I have a contractor putting a pocket door in a wall in our 1925 house. He removed plaster from one side of the wall and exposed a single strand of Knob and Tube wiring right where the door needs to ...
Jasman's user avatar
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How to bring 1/0 wire through foundation below grade?

I’m building an off-grid cabin in California. I have an array of solar panels that feed into an inverter and batteries in a small utility shed, connected to a 150A main panel. I want to run 125A into ...
Daniel's user avatar
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Does NEC 2023 require conduit mounting hardware to be listed?

I only have the NEC 2020 edition on hand, but from what I'm reading on 358.6 for EMT listing requirements: EMT, factory elbows, and associated fittings shall be listed I think it's safe to assume ...
contrapsych's user avatar
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2 answers
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Can I run wires from separate panels through the same conduit?

I own a duplex and the attached shed is divided in 1/2 for each side of the duplex. On the rear exterior are the 2 electrical panels, one for each side of the duplex. I was going to install hookups ...
tacomaguy20's user avatar
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Should I use cable or wires in conduit for my new panel?

I'm redoing basically all of my electric and upgrading to 200A. The plans are in another question (Is my new electric/subpanel plan correct?) but the relevant part for this question is: Service ...
user112697's user avatar
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What could this conduit under my basement slab be?

I was moving a shower drain for a basement bathroom and exposed what looks like some kind of cable conduit under the slab. It looks like the kind that's slit all along the length of it and just snaps ...
Egor's user avatar
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Can I put 14/2 Romex through a wiremold instead of inside the ceiling for a light fixture?

I have a closet with a light on the wall: I would like to remove the light on the wall and instead create a new fixture on the ceiling, but using the same outlet. The ceiling is masonite tile, above ...
PaulG's user avatar
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How can I transition NM cable (coming out of drywall to peninsula cabinet) into conduit with THHN wiring for the peninsula outlet?

I have a roll of NM at the end of one of the (currently inactive) 2 kitchen circuits, which the electrician left for peninsula wiring. NM is coming out of drywall, under the counter, going directly ...
JCott's user avatar
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What could be inside this conduit in my kitchen wall?

I was having electrical work done in my kitchen and they cut a drywall hole behind my oven, and uncovered this curious conduit or vent pipe or something. It's quite hard, almost cement-like, clearly ...
swrobel's user avatar
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water condensation inside electrical conduit running on attic

Today my TP Link Kasa smart switch started acting strange (turning on and off randomly) - it is broken now. When I hit reset button, a few drops of water dropped out. I removed the plate, pulled the ...
Arek's user avatar
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Would it be fine to use EMT to power a tankless water heater instead of flexible alternatives?

I recently had some plumbers install an exterior (natural gas) tankless water heater here in central Texas, in case the jurisdiction and / or climate matters. For the purposes of getting it installed ...
ZachS's user avatar
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Bending EMT offset on a sharp corner

I live in western New York. I'm using 1/2 inch conduit to protect 14/2 romex as it goes up my basement wall (before I run it unprotected along the basement ceiling to the panel). My basement wall runs ...
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How do I transition from a Romex wire in a plastic box to a weatherproof box?

I am a new homeowner and am relatively handy. I have worked in building maintenance at a hospital, but I am not entirely familiar with the electrical codes. I was meaning to replace a faulty outdoor ...
Frank's user avatar
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Is my plan for running conduit to a new subpanel sound?

I'm installing a new subpanel in my basement that I am finishing and thinking to run some conduit from it out to the garage and down to the crawl space below for flexibility on adding future circuits ...
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1920s Electrical Conduit?

I had an electrician come out to my 1920s Chicago Bungalow, and he told me that all the original electric was "piped," that is, sheathed in rigid steel raceway, with the piping serving as ...
Chris S.'s user avatar
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How to terminate EMT into a panel in a bay extension

Suppose I'm running some wire in EMT into the side of an electric panel, and the electric panel is flush mounted into a dedicated stud bay extension / bump out. Here's a sample photo with a panel that'...
peter's user avatar
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Removing Junction Box with extra wire

I've removed a few junction boxes to install recessed lighting however this one is giving me an issue. I have attic access and used it to get the junction box detached from the studs and ready to move ...
Darnell Welcher's user avatar
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Can I use Dyke aluminum 2-2-2-4 cable , to run underground from outdoor (200 main breaker ) to a 100 amp sub panel (indoor)

The NEC states that "Underground service-entrance cable (USE) shall not be used under the following conditions or in the following locations: (1) For interior wiring (2) For aboveground ...
John's user avatar
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Garage conduit a few questions

Trying to live in a new house. The garage only has one outlet. I would like to put several more around the walls to facilitate my woodworking hobby. more light. There are two fixtures with a single ...
SP-Support's user avatar
4 votes
1 answer
853 views

Consolidation of many circuits from breaker panel using nearby junction box

I am combining a bunch of underutilized circuits, pulling them out of the breaker panel into an 8x6x4 junction box above it where I will combine about 10 cables into 3 circuits fed to the breaker ...
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applying duct seal inside electrical pvc conduit

I am installing an ev car charger in my attached garage and running pvc conduit from my main panel in the basement through the wall into the garage. What is the recommendation for using duct seal ...
stan li's user avatar
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How to Ground flexible metal conduit (FMC)

I’m looking to run 3 circuits 20A 120VAC (3 wires per circuit; H,N,& G, 12 gauge THHN) together through 3/4” FMC. Circuits will have ground fault and arc protection breakers. Residential basement ...
Ray2446's user avatar
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Which wire size and conduit for a 200A subpanel?

I recently got a service upgrade to 200A. My old sub panel (from which all branch circuits connect) was 100A and recently got upgraded as well but the feeders are unchanged. To support this, the main ...
divB's user avatar
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3 votes
3 answers
995 views

Does adding an explicit ground wire to EMT conduits provide any advantages?

I am well aware that NEC allows the EMT conduit to be used as grounding conductor. In my home, there is no dedicated grounding wire through the EMTs. I know this is fine. When I recently got HP/HPWH ...
divB's user avatar
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69 views

Which wire and conduit with already-present outlets in the basement

I have a double outlet in my basement that is fed by 14/2 Romex wire (from the panel to the two outlets). The wire runs along the ceiling for a length and then drops down vertically along a concrete ...
THill3's user avatar
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1 vote
1 answer
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How can I surface-mount (PVC conduit) light fixtures and ceiling fans?

Background: I'm currently in the middle of rewiring my house, largely because it's an older house (vintage 1939), and between multiple rewirings and the oldest wiring still in use being original, we ...
Cerebrate's user avatar
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Can I use LFNC to supply an EVSE on the exterior wall of my house?

I'm trying to add a Level 2 EV charger (EVSE) to my home in the least expensive way possible. The Grizzle-E charger can output 40amps, so I'm planning on supplying it using a 50amp breaker with 6awg ...
Uncle Woody's user avatar
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3 answers
236 views

Correct wire and conduit to extend a 30 amp circuit 350 feet?

I'd like to check my plan before contacting an electrician. I plan to install a 30 amp RV connection in a wet environment approximately 350 feet away from a 200 amp distribution panel. Based on ...
jonc's user avatar
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0 answers
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correct wire and conduit to extend a 30 amp circuit 350 feet [duplicate]

I'd like to ask a question here before contacting an electrician. I plan to install a 30 amp RV connection in a wet environment approximately 350 feet away from a 200 amp distribution panel. Based on ...
jonc's user avatar
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2 votes
2 answers
440 views

Schedule 40 strapping ideas

I have some schedule 40 conduit on the side of my house that was never really installed properly. The 2 inch conduit at least has an expansion joint in place, but does not have any strapping. The 3/4 ...
kubiej21's user avatar
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0 votes
1 answer
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Can I use a 45 degree angle when dropping conduit into the ground?

I am running electricity and internet over to a shed in my backyard. When my conduit drops from my wall, it seems like it would be a much easier pull if it transitioned at a 45 degree angle into the ...
blake's user avatar
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2 votes
1 answer
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2020 NEC: Proper installation of PVC Conduit for Data Cables

I am installing a media enclosure in an under-stairway closet on my first floor. I plan on running Schedule 40 PVC conduit between the enclosure and the crawlspace directly below, as well as between ...
Morgan March's user avatar
1 vote
1 answer
121 views

How do I properly ground metal conduit (outdoor application)?

I am trying to add an exterior outlet to the rear of my house using an existing circuit that was once wired to a floodlight, and want to make sure I am grounding the circuit properly with my ...
John Doe's user avatar
2 votes
1 answer
129 views

Extra hole in a waterhead

I have this outside conduit for my internet copper cable and internet fiber. And I guess one of the wires is electrical power? It is mounted on my outside wall, high-up and hard to reach by ladder, ...
Bram's user avatar
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12 votes
3 answers
2k views

Is there an NEC-compliant way to cross this 40 inch gap between a PV array and my house without digging?

I'm working to finish up my DIY ground-mount solar project, and I need some advice for one of the final connections. For reference, the project is all done with micro-inverters at the panel so we're ...
David Hay's user avatar
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0 votes
1 answer
102 views

Rules for running new electric outlets

I'm looking at buying my first house and since everyone finishes the inside of the garage with sheetrock I will need to run some new lines or my car charger, milling machine, table saw, etc no matter ...
rasmukri's user avatar
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1 vote
4 answers
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How to cut a straight line for conduit between floors

I am going to run conduits for Ethernet from the walls of my 1-story house to the basement below. How do I measure and cut in a straight line such that the hole I open in the wall lines up with the ...
Mystagogue's user avatar
3 votes
1 answer
195 views

Should I oversize conduit and grounding wire size?

I'm getting ready to place my materials order and have a few last details/checks I could use help with. This is for installing a subpanel in a detached pump house. I'm putting a 60 amp two-pole ...
cjc's user avatar
  • 101
0 votes
1 answer
299 views

How to transition from underground schedule 40 PVC conduit to EMT inside building through concrete slab?

I'm running feeder wires in 1-1/4" schedule 40 PVC underground to detached structure. I plan on using a 2" sleeve for the slab pour and a long 3' radius sweep elbow conduit fitting to bring ...
cjc's user avatar
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1 vote
2 answers
78 views

How to trench building front facing elevation to run electric line for my new elevation/facade lights

My building has an beautiful elevation but at night but the lights fixed at the elevation is not enough and so I'm planning to install few elevation lights but I'd like the conduit to the lights ...
King's user avatar
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0 answers
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Schedule 40 or schedule 80 PVC where feeder wire comes out of ground?

Our well pump installer is still using schedule 40 for running pump wires up to exposed well head. I checked with a contractor and they still use schedule 40 outside buildings, but EMT inside. I'm ...
cjc's user avatar
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0 votes
0 answers
67 views

Is there any advantage of running EMT over FMC?

I was planning to extend the existing FMC conduit that runs my Dryer circuit with two additional 20A circuits for bathroom and washing machine (both of which are currently hanging on some random ...
divB's user avatar
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0 votes
0 answers
35 views

Maximum bore & space between bore on load bearing top plate?

I'm installing a structured media cabinet during an under stair closet renovation. Closet is on first floor, wall is load bearing, and also has fire blocking since it's connected to the stairs in a ...
Morgan March's user avatar
1 vote
1 answer
490 views

How can I flush-mount an exterior outlet in a metal or conduit-compatible box?

I am updating the electrical systems in my old, detached, unfinished garage. The previous owner cut holes in the siding to put in old work PVC boxes for flush mounted outlets on the exterior on the ...
ForbiddenDonut's user avatar
4 votes
1 answer
742 views

Underground Wiring Through Basement Wall

I am installing an RV pad with full hookups along one side of my home. The service panel I plan to connect to is very close by in the basement. All the info I have found on underground wiring ...
Frank's user avatar
  • 346
1 vote
3 answers
859 views

Code requirements for running water, power and sprinkler wire in same trench?

I am having a trench dug that passes through our asphalt driveway (previously a public county road). I am running power to a pump house on the far side and want to run two water lines and sprinkler ...
cjc's user avatar
  • 101
0 votes
1 answer
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Do I need to use Schedule 40 or 80 pvc conduit for exposed sections outside?

I've been using 3/4" schedule 40 PVC for three 6-gauge THWN wires coming from the main house panel, exiting the house to the outside and into an 18-ft. deep trench, and leading to an EVSE (...
tubaman121's user avatar
1 vote
2 answers
50 views

What is the right box fill for my 1x30A circuit and 2x20A circuit case?

Box fill calculations are so frustratingly ambiguous and confusing. I have the following setup: A 30A dryer circuit along with 2x20A circuits comes via FMC from panel The dryer (3x8AWG) passes ...
divB's user avatar
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