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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271 views

Does my hot tub wiring plan check out?

I'm looking for feedback on my electrical plans for a hot tub install. The space is in a 7 unit building located in NYC. The apartment is owned, not rented. I am planning on hiring an electrician for ...
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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
110 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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1answer
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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2answers
423 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
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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1answer
153 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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2answers
692 views

How do you wire and replace an old bathroom vanity light fixture

I am replacing a bathroom light fixture in an old condo built in the 70s. There is armored cable coming into the fixture from the wall. From my understanding is that I need to do these steps, ...
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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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4answers
19k views

Regulations for buried cable in the UK

I'm running a cable from my house to a site in my back garden where I am building a shed. The length of the cable run is about 7-8 metres. I have steel armoured cable which is OK for direct burial. ...
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2answers
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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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
100 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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4answers
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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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59 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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427 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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1answer
92 views

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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134 views

Updated How to secure electric mast to wooden siding

I need to secure a 10 feet service mast that will past through the roof on the outside. From grade to top of roof is just over 10 feet. Utilities company has stipulated that the mast must be at least ...
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2answers
116 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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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
170 views

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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3answers
85 views

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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110 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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2answers
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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2answers
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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1answer
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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3answers
105 views

Using steel conduit as a ground intermitantly. Any problems with this?

Small back story: This is a Philly row home, so the long walls are solid brick. original outlets were non-existant or embedded in baseboards. While most of the home is being wired with romex, I am ...
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2answers
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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0answers
39 views

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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1answer
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
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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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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1answer
2k 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
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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1answer
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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1answer
192 views

Do I need to use two wire types for an indoor/outdoor run to a garage?

I need to install a 14-50 outlet in my garage to charge my car. I have a 200 amp breaker panel on the back of the house. It is approximately a 40' run on the outside of the house to where it would ...
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0answers
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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5answers
76k views

Why is it good practice to remove sheathing from NM wire when going through conduit? [duplicate]

I've been discussing specifics of an electrical job with a licensed electrician and he mentioned that in my area, it's acceptable/recommended to feed 12 gauge NM wire through an outdoor conduit but ...
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5answers
31k 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 ...
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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
141 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
423 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
74 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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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 ...
6
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4answers
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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