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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51 views

Flexible conduit 1/2" to 3/4" knockout

I'm working on a residential wiring project. I'm trying to figure out how to connect a 1/2" flexible aluminum conduit to a 3/4" knockout on a junction box. The existing junction box is ...
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1answer
111 views

How can I extend PVC Conduit already installed?

I recently bought a house with an exterior garage. The previous buyer only had an on/off panel installed on the outside with a single Romex running to one receptacle for the garage door opener. I'm ...
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61 views

Underground garage supply conduit standoff

I had 100 amp underground service to my old garage. In 2” conduit PVC SCH 40, 24” trench, code USE wire size, slip joints, etc While building the replacement garage, Contractor poured the new slab in ...
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424 views

Does NEC allow mixing wire gauge in distinct sections of conduit when derating?

Here's the hypothetical scenario. I have two segments of conduit: Conduit 1 (Distributor), direct from electrical panel to a distribution junction box 1 Conduit 2 (Branch), from distribution junction ...
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1answer
239 views

Run dedicated circuit by passing in and out of the back of a gang box

I want to run a couple of dedicated circuits in my basement. Can I pass through outlet boxes basically making 180 degrees? The wire would go in and out of the back of the outlet box. I'm in Cook ...
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577 views

Tee or split GFCI circuit in garage (120v) - Practical and Code question

Relevant but didn't address the GFCI part of the question: Split a single branch circuit into two runs? I'm wondering if I can split/tee/branch an existing circuit that uses wall mounted metal conduit....
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59 views

Exterior surface mount outlet w/ conduit through soffit

I'm looking into mounting a TV on my patio on the exterior wall of my brick home. Only problem is, the best place for it is the exterior of a masonry fireplace/chimney, so I can't drill through the ...
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65 views

Which conduit to use

I'm installing a 220 volt 30 Amp plug for a scuba compressor. I'm installing it my sun room. There is a hole in floor trim already from the old heating system so I was planning on using that. Run ...
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93 views

How can I run cable from a solar inverter to a cupboard room where my consumer unit is situated?

The cupboard room is not next to an external wall, about 5 metres into the house. The power to the house comes in through a conduit, quite large, more like a drainpipe, about 5 inches in diameter. ...
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1answer
101 views

Running electric to sub panel in detached garage, can I use a flexible conduit in my basement?

My understanding is that feeder wires need to be in conduit for the whole run, but running schedule 40 through my basement joists seems awful and maybe impossible. I’m wondering if I can use a more ...
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60 views

What kind of conduit for cable riser raceway?

Some background: I asked a longer version of this question here. I recently bought a late 70s, two story home. I am working on (i.e. planning and budgeting) a project to wire the home for ethernet, ...
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Is there a need to replace wiring if I tripped the microwave oven when drilling through drywall?

While drilling through drywall in bathroom to install a handicap bar to studs, I later discovered that the microwave oven breaker had tripped. Apparently one of the drill holes had missed a stud and ...
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431 views

8/3 UF Cable or 6/2 UF Cable in 3/4" Rigid Conduit

Questions: Will 8/3 UF Cable or 6/2 UF Cable fit inside 3/4" Rigid Conduit, and will it be up to national code? Background: I am planning on wiring a shed for power. Approximately 50 amps, and ...
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Is my furnace switch wired to code?

I have a goal to replace all the switches in my house and then pass inspection. I'm following NEC 2020, and must meet NEC 2008 for the local code. Everything was going well until I removed the cover ...
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1answer
52 views

Issues with only using conduit for receptacles and lights in new workshop instead of in-wall cable?

I'm trying to make this structure as weather and rodent/insect-proof as possible so ideally, I don't want any holes in the walls and ceilings. I know in my current shop I'm always running new outlets ...
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1answer
82 views

2" low voltage conduit crushed 8' under grade

I have 2" low volt conduit that runs 50' underground from a communication mast on an out building to a basement. The conduit is crushed at the sweep 90 where it enters the basement. I currently ...
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2answers
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Can I use "Southwire E51583" AWG 8 wire on 50amp breaker?

This question is two fold: I have a PrimeWeld 225x TIG welder and it calls for a 50amp/220v breaker and NEMA 6-50P. I need to run 60 feet from NEMA 6-50P to breaker box (I have 200amp service). ...
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125 amp sub panel cable suggestions

We will be installing a 125amp sub panel in our pole barn which is about 115 feet from the main panel. We will use 125amp breaker in the main panel and run conduit the entire run. From what I have ...
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1answer
72 views

Does NM romex in conduit as a damage shield <24" long need to meet the <40% fill requirement?

There is an existing ~20"-long 1/2" EMT conduit run through a concrete floor between floors (old work). It would be convenient to run NM through the existing conduit instead of switching ...
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111 views

UFB cable in conduit?

I have about 200' of UFB cable to run to a barn. Does it require conduit, and does it have to be grey electrical conduit or can it be 3/4 black plastic water pipe?
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593 views

Which of these conduit connections meet the "within 12-inches" requirement?

IIRC, conduit and NM need to be supported within 12 inches of the panel (and again every 10' for conduit or 52" for NM). Which of these panel attachments qualify for being supported "within ...
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82 views

Wire size selection to carry electrical between buildings

Preface In order to carry electrical service to a detached building, or areas with their own sub-panel within a residential property, what is a good method to use to select wire size and type? ...
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59 views

How do I get NM cable to an exterior junction box on the gable end of a house from the attic? [duplicate]

I (in the US) know I can't use NM cable in wet locations. However, I'd like to bring power from a circuit that's running on NM cable in an attic to conduit on the exterior (gable end) of the house: I'...
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124 views

Wire protection for underground line to detached garage

I’m running a line from my 100amp main panel to a 40amp sub panel in my detached garage. Can I run 8/3 NMD90 Romex through my the overhead joist system in my basement and out of the house through a ...
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65 views

How can I add an outlet off of a conduit body?

I want to add an electrical outlet near this point. On the other side of the wall from this junction is my main breaker panel so I intend to run the wires from the panel through this junction. The ...
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402 views

How to connect flex NMC to Rinnai tankless

I have a Rinnai V53DEP propane external tankless water heater. The manual calls for a disconnect, so I provided one. My plan is (was?) to have a flexible whip take all the wires (power and remote ...
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117 views

What kind of conduit do I need for my mini split AC line?

Running 240V for mini split through exterior wall in conduit from indoor unit to outdoor unit. Cable supplied by mfg is SJOW 16/4 105c 251603 3/8" O.D. Can use 3/4" non metalic flex conduit (...
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Head Scratcher: Mini Split Conduit Question [duplicate]

I'm installing a Mr Cool 24K BTU DIY mini split 240v system. It's replacing one that worked flawlessly for 2 years. The manufacturer replaced my original one because of a manufacturing defect - ...
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61 views

Wiring in conduit - TH? Color coding? Grounding?

Installing tankless water heater - 18kW, requires 2 x 40A circuits. I have a lot of 8ga Black TW wire AND 3/4” conduit. Is TW still legal ( I have some THHN, but want to use up the TW where I can)? ...
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1answer
59 views

How do you verify a good ground connection when using EMT conduit as the ground?

When using metallic conduit as the ground wire, how do you confirm that the conduit provides a solid end-to-end connection? If using an ohm meter, how would you set it up and how many ohms are ...
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83 views

How can I add a sub-panel to a garage fed by existing 1" RMC conduit?

I want to add a sub panel to my garage to run a plasma cutter, welder, 220v air compressor and a CNC table. Not at the same time, but the plasma and air compressor probably will at times. I currently ...
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84 views

Need a GFI that will notify me remotely when it is tripped, and let me reset ist remotely [closed]

I travel frequently and have a GFI that goes off occasionally - average 1-2 times a month. Reason it goes off is that it has a circuit that is wired underground and I don't want to go to the expense ...
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1k views

How should I mount conduit to my wood-laped siding?

I was thinking about using superstrut to hang conduit on the side of the house, but hangers would be easier because siding is wood-lapped so it is not a flush surface. I'm open to other options as ...
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27 views

Can 6/3 cable be run in PVC conduit? [duplicate]

An electrician friend is installing a new Nema 14-50 plug in my garage for my Tesla. I ran 125' of Romex 6/3 cable from my panel to the garage. He will be installing a 50A breaker as well. My ...
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3answers
110 views

Installing a 100A panel in detached garage. NEED HELP!

I am a carpenter contractor with a wide knowledge of the trades. I am confident in my abilities to tackle this job, but want to make sure it's done RIGHT! I used to be terrified of electrical work, ...
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1answer
142 views

How can I protect a PVC electrical conduit that's buried very shallow?

I found some PVC electrical conduit which is about 2 inches deep: The conduit could contain 240v or 120v AC, and would have to be traced back to the source to be sure. Also in the picture is a coiled ...
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2answers
424 views

Funny pipe in junction box next to outlet

I'm going to install a 2 gang junction box for behind my tv - one side will have an outlet and the other side would be for a funny pipe to pull HDMI cables thru. I plan to use some flexible plastic ...
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1answer
76 views

Liquid Tight Flexible Conduit generator span

I can't find a specific answer for this situation. I know that flexible conduit can be used as a 6 foot whip for luminary and "other equipment". It can be used over 6 feet. The question ...
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2k views

Is it wrong to run ground wires all the way through conduit to each junction box?

I had a 20A circuit that was run to a work bench built by the previous owner of my home. I ended up replacing the work bench and replacing the circuit, with new THHN wiring all run through EMT conduit....
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2answers
159 views

Romex/NM Clamp For PVC Sch80 Conduit?

During the last inspection visit, I was told that the pvc sch80 conduits I have needed to have some sort of fastening/clamp to secure the cable at the top of the sch80 pipe. Even though I had ...
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155 views

Conduit for Outside AC\Heatpump

Need to run conduit for a new AC\heatpump. Main panel is in the garage. Looking to go through the wall to outside pretty much right at the panel and run it all on the side of the house. Outside the ...
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1answer
136 views

Is it okay to strip UF cable at the point of entry to outside conduit?

So I've installed a new single-pole 30 amp outdoor waterproof receptacle box and outlet on my house. Is it ok to run 10/2 UF-B to a receptacle? And is it okay to strip the sheathing where it enters ...
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66 views

What type of fish tape would work best in metal conduit?

I need to fish three 12 solid THHN wire through a narrow (old building) metal conduit with 90 degree bend. I'm shopping for fish tapes and there are several different materials, and I don't know which ...
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153 views

Is it OK to Run 12VDC and 120V Supply Wires in Small Stub Between Built-in Junction Boxes?

I built a new deck and I'm installing 3/4" EMT with raintight connectors to power an outlet and a couple of low voltage 12VDC LED drivers beneath the new deck. Each driver has a built-in ...
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94 views

60A Subpanel with feeder wire spanning a finished section of the basement

I just recently had my GE 20 space main panel with 100Amp service replaced with a 40 space GE panel and 200Amp service. I am looking to install a 60 or 80Amp subpanel in the garage fed by this main ...
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96 views

Can I use a shared conduit for an above-ground pool setup, or not?

I've been reading this answer to a question that more or less is my situation. The difference being that I already have a 100A sub-panel (fed by a 50A breaker from the house) in an outbuilding from ...
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2answers
83 views

Electrically distinguish neutral from hot

I have a box with three conduits. These are in-wall/under the floor steel conduits from an apartment built in 1950. One conduit has hot and neutral wires coming from panel. The second has hot and ...
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1answer
447 views

Should I use non-metallic conduit instead of PVC?

I am researching conduit options for direct burial. From what I can tell, it seems like the flexible, non-metallic tubing is cheaper than the PVC and can be buried. Also, as far as I know, EMT is not ...
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261 views

How do I run the PVC conduit into a garage with a ground-level foundation?

I need to run conduit underground to a new garage. My problem is I don't understand the proper way to run the 2in PVC conduit outside to the sub panel. The wall sits on a 3ft 8in stem wall. The top of ...
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1answer
81 views

DIY Fence Screen made with EMT Conduit

I would like to install some black mesh screening material to hide an area of my yard. I was thinking that I could zip tie the mesh to 3/4” EMT conduit. Any suggestions on easiest way to anchor the ...

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