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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1answer
34 views

EMT all the way, or start with IMC outside and transition to EMT inside the building?

We are running a subpanel from the outside of the building to the garage. The 2" metalic conduit will begin from the top of a 3R box's raintight hub, run up the building about 8ft, turn right, ...
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2answers
83 views

Can I repurpose an unused 6" radon pipe as an electrical conduit?

When the house was built, 3 radon pipes were installed between the basement and the attic. They are 6" PVC plastic are completely within the walls of the home except for their ends. Only one of ...
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1answer
53 views

How do you correctly use EMT conduit terminated into a female-threaded raintight hub atop a 3R outdoor panel?

What is an NEC-accepted way of using EMT pipe with this female-threaded hub? (The picture is an Eaton DS200H2 2" Rainproof Hub/Conduit/Plate to be used atop of a Eaton NEMA 3R BRP20B200R.)
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108 views

What is the trade term for the thing that connects the top of a load center panel to 2" EMT conduit?

What is the trade name for the "adapter" for the top conduit hole that is covered at the top of this picture that would allow you to connect 2" EMT conduit? It needs to be rain tight (...
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6answers
511 views

Junction box partially behind drywall and partially exposed

Let's say I have a 200 amp breaker panel that is flush mount. I want to wire in an EVSE across the garage using conduit. Somehow I need to make that transition for the conduit from behind the ...
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3answers
59 views

Tight 90 degree turn for outdoor EMT

I'm looking to install some outlets in an outdoor and rain-exposed location using 1/2 inch EMT. I've found plenty of raintight couplings and box connectors, so I'm good there. But I do need to make ...
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1answer
58 views

Correct transition for pvc conduit to liquid tight flexible conduit on a concrete slab

I am installing conduit for a hot tub. I have conduit coming up from underground at the edge of the slab and I wondering how to transition it to liquid tight flexible conduit on top of the slab. The ...
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1answer
79 views

Find other exit of empty electrical conduit

I live in a flat in a multi-story house. The electrician went bankrupt and did a quite sloppy, undocumented job. One of the results is, that I have quite some empty electrical conduits… that end ...
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2answers
52 views

CanI use existing 110v conduit for adding new 220v outlet in basement?

I live in the Chicago area. I'm adding a new 220v outlet to a corner of my basement (for a 3000W sauna heater). The basement is finished so putting in new conduit above the ceiling would be ...
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2answers
117 views

Advice on running power to a shed

I have a 200 amp service panel, and I calculate I am using about 160 amps. (I used a formula I found online that takes the square footage of the house and then adds from there) The new 160 sqft shed ...
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3answers
90 views

What is the most efficient way to install my new outlets?

An electrician is installing a brand new 200amp panel (upgrading electric company service) right next to my existing panel in the basement. My current panel is in the wall flush with the drywall. The ...
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1answer
48 views

How much #12 NM-B can I put in PVC conduit?

I am going to be upgrading a full, very small 6-space panel in my attached garage to a much larger (40+ space) panel soon. I will have a number of circuits to run from this panel to a planned addition,...
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66 views

How do you properly use metal conduit as a ground?

I have read here that metal conduit can be used as the ground and you needn't then pull a separate ground wire: What are the NEC rules governing this? How do you avoid "weak ground" links ...
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1answer
48 views

Expanding two gang box to three gang with metal conduit

I live in Chicago so everything in my walls is in metal conduit. In what is currently a two gang box, all three of the top punch out holes are connected to metal conduit. I'd like to expand this to a ...
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0answers
34 views

Running Electrical Wires exterior to interior

I need a new line placed in a certain area of my house, (for a fish tank) but running it inside isn't a super realistic option, as it's a good distance and the joists run perpendicular to where I ...
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1answer
44 views

2 cables in same conduit

I am needing to run 2 underground 12/2 UB (gray wire) cables for a 20 amp pool pump and a 20 amp gfci socket. Can I run both cables through a single, buried 3/4” schedule 40 conduit?
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49 views

Wires through conduit instead of drilling ceiling joists

I am moving the washer & dryer upstairs in my house and will have a contractor hook-up the 10-3 and 12-2 wires to my main panel, but I am running the wires across my attic. Instead of drilling 23 ...
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3answers
1k views

Does it matter if my underground conduit overlaps or crosses over existing conduits?

I'm planning on digging a trench for underground electrical conduit. I recently called my state "call before you dig" underground locating service. They finished marking the locations of ...
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3answers
537 views

Should I run RMC all the way from panel to sub-panel, or are there cheaper options?

I am running a 60 amp circuit to a shed about 100 feet from our main panel. I'll be running 3 #6 copper wires in a 3/4" rigid metal conduit down a trench with 6 inches of cover (hand dug, and I ...
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2answers
69 views

What kind of conduit should I use with UF-B to reduce depth of burial?

I currently have a 50' length of 14/2 UF-B. I only need to dig a 40' trench, but I know it should be buried 24" deep. That seems like it will be a lot of work to bury it that deep. It seems like ...
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1answer
39 views

Sub Panel feed to existing garage

I am wanting to upgrade a garage by putting in a larger 10 space sub panel with a 60 amp feed from the house. I plan to use a 4 wire assembly of #6 copper USE-2 conductors direct buried from house to ...
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2answers
43 views

What fitting do I need to ground EMT at my residential electrical panel?

I know EMT can be used as its own grounding path, and no separate grounding ("green" or bare) conductor is required within the conduit, but what fitting do I need at the panel to complete ...
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0answers
29 views

Chased Conduit Bend through Exterior Wall

I am in the middle of a re-wiring project, part of which requires installing new light switches on the inside of an exterior wall (plaster directly on brick). I will be installing the switch box flush ...
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1answer
55 views

How to run cables in drywall?

How to run cables in drywall? It is unlike a masonry wall with built-in conduits, isn't? How is it done? Thanks in advanced.
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2answers
423 views

Equivalent of union for rigid conduit installation?

As everyone who's ever done some plumbing knows, every fitting goes together clockwise. The more pipe you run, or the more complicated your geometry is, the more likely it is you'll end up with ...
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1answer
84 views

Fiber vs STP vs UTP for underground conduit run to backyard office?

We're building a standalone structure in the backyard that will be used for a backyard office. There's already a trench with a conduit for electrical and a 3/4" conduit for some sort of ...
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13 views

SLB gaskets: water tight?

I bought 2 cast aluminium SLBs (1-1/4") for conduit from the same big box store the other day. They had 2 different gaskets in the removable cover however. One was the common black rubber/...
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4answers
3k views

Why can I not assemble conduit around cable, but must pull it after assembly?

I have seen a number of answers here from our esteemed electricians about running wiring through conduit, and many of them include a warning similar to: You're not allowed to piece the conduit ...
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2answers
80 views

Adding circuits to an outdoor surface mount electric panel for kitchen remodel

I am in the middle of a kitchen remodel. I originally thought there were (2) 120v circuits into the kitchen, so I thought I'd only have to add a couple more, but that is not the case. The two circuits ...
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3answers
91 views

Extending branch circuit to outdoor shed and additional exterior outlets

US, Southern CA, NEC 2017 I have a 15A* kitchen branch circuit not feeding countertop outlets that also feeds a single outlet on an exterior wall. The existing circuit consists of three indoor outlets,...
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1answer
91 views

Is it allowed for a wire to go directly into a wall from PVC conduit (with some connector)? Or do I need to install a junction box?

I need to install a permanent wiring from a receptacle on the ceiling of finished garage to outside of garage (for motion-sensor flood light). The wire will not be below 9 feet level. Do I need to use ...
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2answers
52 views

How to tell whether metal junction box is properly grounded?

I have a detached garage that is powered by a circuit breaker in the main house’s breaker box, which is properly grounded. The outlets in the garage have metal junction boxes, fed by metal conduit ...
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1answer
60 views

Outlet grounded by conduit - how do I add a second outlet with Romex?

I tested the outlet with an outlet tester which states that it is properly wired. However, I know that conduit is not necessarily always sufficient to provide a proper ground. So I tested the outlet ...
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1answer
96 views

Burying AC, solar DC and ethernet cable

I am building a pole barn about 200 feet from my house. I would like to run 90amp or so 240VAC to a subpanel, as well as ~400VDC from solar panels, and a pull or perhaps two of Cat5e ethernet cable. ...
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1answer
154 views

Is it ok that the cable for my dryer circuit is suspended from the ceiling?

I have a dryer line hanging from the ceiling joist. Will it pass code if it's attached to the poured concrete basement wall? Do I need to put the wire through conduit? Thanks.
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1answer
102 views

Best way to mount metal boxes on EMT run through 2x4 framing

I've gone over this in my head a few times, and I think this is the best solution given the problem at hand. Just want to get some feedback and see if anyone has an alternative idea. This is going to ...
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2answers
1k views

Can I run stripped Romex/NM through conduit?

If I have NM cable running into a junction box, can I strip the sheath of the NM cable starting inside the junction box and run the conductors without a sheath through conduit that is connected to the ...
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0answers
44 views

Bare ground inside conduit? [duplicate]

I'm finishing up the rough in wiring for a kitchen remodel, but I have a situation where I can't run cables through studs for a light switch because there is no wall cavity. I decided to run it strait ...
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5answers
1k views

How do I run more than 2 circuits in conduit?

My understanding of color coding allowed by NEC is: Ground: Bare, Green or Yellow/Green Neutral: White or grey Hot: All other colors If I need to run 3 distinct circuits in conduit, I might choose: ...
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1answer
77 views

Should I run conduit to protect an exposed cable and comply with code?

Minnesota code says "exposed" wire (NM 12/2 w ground, or 14/2 w ground), in a basement, what does that mean? An existing wire had been run on the backside (on the furnace room side) of the ...
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2answers
108 views

8 AWG solid EGC in raceway for 100 amp subpanel

I'm adding a 100 amp subpanel to my detached garage and have a question about the EGC I've already pulled through the underground LFNC-B raceway. Taking the advice from a similar post on this forum, I ...
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2answers
40 views

tall service mast for remote aerial drop

I'm working with the local telecom provider to get internet access to a remote property in California. There is a 5' tall 8x8 pressure treated post with an electric meter and some other equipment ...
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1answer
31 views

Garage surface conduit feed an outdoor outlet

I have an attached drywalled garage w/ a subpanel that feeds several outlets in the garage. All wiring is in surface mount PVC conduit using THHN wiring, and all are serviced via GFCI breakers. I ...
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1answer
91 views

Sub panel feeder circuit wire sizing

I’m planning to upgrade the service in a detached garage, which is currently fed by a single 15amp circuit, and I wanted to confirm that I have my circuit sizing correct. The existing circuit runs ...
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2answers
80 views

Was FMC >6ft Ever an Acceptable Grounding Path?

Wiring routes out of my garage subpanel through exposed flexible metal conduit (FMC) to metal boxes for just about everything. Garage is detached, and 1990's era. The pool equipment, pool lights, and ...
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0answers
54 views

Pulling out a broken spring wire from an electrical conduit

I want to install an fiberoptic drop cable in a 1/2" conduit with an existing phone line. The other side of the conduit is approximately 20m away in the utility duct of my apartment. Found a ...
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2answers
704 views

Does an Electrical Metallic Tube (EMT) Inside Corner Pull Elbow count towards the 360° total bends?

When running EMT, my understanding of Code is that the conduit cannot contain more than 360° in bends. If more bends than that are needed to complete the run, a pull box is required. Do angle ...
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5answers
2k views

Is an ethernet cable threaded inside a metal conduit is more protected from electromagnetic interference? [closed]

I am at the end of a renovation, and only now  I discovered that it is not recommended to run ethernet cable in parallel and closely to power cables, even if they are in separate conduits, but I may ...
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1answer
159 views

How to bond both ends of raceway containing grounding electrode conductors?

At my home I have a detached garage which has sorely needed to have its single branch circuit upgraded to a proper underground feeder, subpanel, the whole works. I didn't want the grounding electrode ...
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2answers
60 views

Subpanel breaker sizing in detached shed with electrical feed from breaker in main house panel

I want to feed 240V 30A from a new 30A breaker in my home main electric panel to a new subpanel in a adetached shed. The electric feed I want to use for the new subpanel is (4) 10awg THWN wires (R/B/...

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