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.

Filter by
Sorted by
Tagged with
2
votes
2answers
44 views

Conduit fill - number of circuits .vs. number of branches

I think I get this one, but just to verify or clarify... (USA NEC) When running multiple circuits (different breakers) in a single conduit, you have to derate after (is it 4?) sharing the one conduit....
0
votes
3answers
36 views

Flexible Metal Conduit length limits with grounding

Basic question - if I have a long run of flexible mc, 12/2 with a green equipment ground wire inside, am I limited in my overall length of this run as long as I meet the support requirements? I see ...
1
vote
2answers
109 views

Flexible Nonmetallic Conduit inside wall?

I’m finishing up wiring a sub panel in an outbuilding. There is an underground run of PVC conduit with THWN, which comes up to an LB on the exterior wall. On the inside I used flexible conduit so I ...
13
votes
3answers
4k views

Can I use old abandoned iron pipe as electrical conduit?

I have an older house (1920) and I have been planning on doing some rewiring to get rid of some k + t stuff. Anyway, I just noticed today that there are some irons pipes that used to be part of the ...
0
votes
2answers
65 views

Wire layout attic conduit

I'm running a pretty heavy circuit from my sub panel to the adjacent wall in the garage. I'll be pulling 6awg THHN wire through smurf tube, and then switching to PVC tube and running it down the wall....
0
votes
1answer
390 views

Requirements for adding outdoor outlets

I would like to run a line of outlets on the front side of my house. Ideally there will be: 1 circuit of outlets that are always on for general use 2 circuits of outlets that are on timers, one for ...
0
votes
1answer
99 views

Electrical pipe heated by heating pipe - against the code?

Please see the picture below. The three pipes in the front are electrical (conduit). The big black pipe in the back is the heating pipe. I guess something went wrong when building the building and ...
3
votes
2answers
145 views

Run conduit perpendicular to ceiling joists in garage

I have a sub panel on a finished wall in my garage. I want to add two 20 amp circuits and run them go outlets on two unfinished walls on the sides of the garage. Is it okay to run metal conduit ...
1
vote
2answers
274 views

How to seal hole from bundle of ethernet cables running through wall/floor?

I'm setting up a home ethernet network in a spare bedroom. I envision running up to two dozen ethernet cables out of a patch panel in this room to the rest of the house. I'll likely bundle these ...
5
votes
4answers
83k views

Can I use indoor Romex in buried outdoor conduit?

Or should I use outdoor Romex? I heard that outdoor Romex doesn't need conduit as you are just supposed to bury it. Edit: Ack, I should have mentioned I have existing conduit that I want to pull the ...
3
votes
2answers
988 views

Running 240v power to detached garage for electric vehicle

We have a detached garage approx 95ft away from the main house and we are looking to run a 240v circuit there. Currently we have Romex wire running straight into the ground. (This is how it was when ...
2
votes
2answers
90 views

Inground Conduit Box for Driveway Snow Melting

I'm installing snow melting cables into a concrete and stone paver driveway. It requires 5 mats rated at 25 Amps and 6000 watts. I also need a 6th small run of heating wire to cover the full area. ...
0
votes
1answer
65 views

Metal Conduit For Tankless Heater

I'm looking at getting an EcoSmart(or similar) electric on demand water heater in my home(WA state, not in Seattle). The sizing indicates I'll need 3x8ga(3x40A breaker) conductors. Long story short, I ...
0
votes
1answer
172 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) ...
4
votes
1answer
46 views

Minimum distance from receptacle terminal to conduit connector

Is there a minimum distance required from a receptacle terminal to a conduit connector? Surely this is defined in the NEC somewhere right?
1
vote
1answer
41 views

How much does EMT conduit installed vertically on a poured concrete interior basement wall have to extend beyond the top of the concrete?

I'm installing outlets in my basement on poured concrete walls and will be using EMT for conduit. How high over the top of the concrete walls must the conduit extend? The original wiring has conduit ...
2
votes
2answers
609 views

Appropriate conduit for several data cables underground over 300' run

I have done some searching around but have not found anything definitive, and/or my background is weak in this area and I may be understanding poorly. I will have 2-4 PoE cables that will be run ...
7
votes
3answers
2k views

Any way to meet code with 40.7% or 40.44% conduit fill?

I’m running conduit along the walls in my shop (in a commercial warehouse) to provide power to some machines and additional outlets. The service is 3 phase, 208 V, 100 A. One of the machines requires ...
0
votes
1answer
32 views

Out Building Circuit and Hot Tub Wire Run?

I have separate garage building that is fed by a 240v 50A circuit run through 1" schedule 40 to a sub panel in the garage. We are installing a hot tub off the main house but it will be located near ...
0
votes
1answer
62 views

Branching off multiple horizontal pipe/conduit runs?

I have to run electrical (EMT), network (schedule 40), and compressed air (Rapidair) lines along the walls of my shop. I'm doing this by putting up vertical sections of Unistrut, and attaching the the ...
2
votes
5answers
7k views

Will galvanized metal conduit balusters resist rust?

I'd like to use galvanized metal conduit as deck balusters with pressure-treated lumber. Will the bare metal resist rust? If not, is there an inexpensive way to improve its rust resistance?
4
votes
4answers
8k views

Running NM-B in PVC SCH 40 Conduit from Outdoor Breaker Panel

For space-saving reasons, I have outdoor breaker panels, and most of my branch circuits are wired through the attic down to individual outlets. Currently, the wires run through the wall from the ...
1
vote
0answers
69 views

Does cabling between a mini-split indoor and outdoor unit need conduit?

I am installing a mini-split AC system where there are multiple indoor units connected to a single outdoor unit. For each indoor unit, there is a separate 4-conductor cable that connects to the ...
0
votes
0answers
32 views

URD Service entrance cable for tankless hot water heater

I'm planning on running 2-2-4 URD service cable to a tankless hot water heater. It's a long story, but I have to run from an outside load center underground and through the subfloor of a building ...
3
votes
2answers
6k views

Is a conduit required or recommended when running SER wire in unfinished space?

I'm planning on installing a 100amp sub panel in the garage. The garage is right around the corner from the main load center in the basement, but part for that path goes through the stairway from the ...
0
votes
1answer
76 views

Running a dryer outlet to garage

Planning to Run a dryer outlet from outside service panel along the exterior wall approx 45 feet before entering the garage. What will be the correct size wire and conduit type to use?
2
votes
0answers
47 views

In Wall Panel for Security System and Camera Cabling

I'm in the process of overhauling my home network and installing some door and motion sensors. I'd like to drop everything down into the Master bedroom, where I will install a panel that is set in the ...
3
votes
2answers
113 views

Using conduit with THHN

May I run THHN above ground under a house unprotected or is a conduit required for this? The wires consist of 3 4AWG wires with an 8AWG ground going from a 60A breaker at the (100A) service to a newly ...
2
votes
0answers
103 views

When running crawl space conduit, must the conduit be run through the joist via drilled holes, or can they be attached underneath?

I'm wiring my home for 110V and cat6e(48-0V). There is currently no wiring, just an air tight shell with interior studs exposed. There is a crawl space where I would like to run all of the conduit ...
1
vote
2answers
3k views

Is a weather resistant gfci required outside in a metal box with in use cover?

I have a pool that is just off my deck. The gfci I have went bad so I need a new one. It was a 15 amp gfci in a metal box attached to 1/2 in emt conduit with a metal box and a non in-use cover. This ...
3
votes
3answers
11k views

Cat 5/6 in same conduit as power: is NM-B required, or is THHN acceptable?

Preface: I'd like to avoid the question of whether one should run data and power together; my question is focused on Code compliance. I'm trying to ensure I interpret Code correctly when running Cat ...
2
votes
2answers
99 views

Can I wire a 120v 20A outlet with #8 wire

I am installing an outlet on the front of my house to charge my Kea Niro. The current charger I am using requires a 120v 20A circuit. In the future I expect to get a charger that will require a 240v ...
2
votes
2answers
38 views

What metal conduit takes a 1-5/8" dia. knockout?

I have a junction box with a knockout that is 1-5/8" diameter. (it was homebrewed, possibly in 1929). Would this be suggestive of a particular type of conduit? It will definitely be metal conduit. ...
0
votes
2answers
129 views

Electrical : can I attach metal flex to pvc conduit?

I am adding a home run from the main panel to the garage. On the outside of the house, it will be pvc. Where I come through the exterior wall to the main panel, I'd like to use metal flex, for ...
39
votes
7answers
207k views

Can Romex (NM-B) be run through conduit?

A few days ago I asked an electrician if I could run Romex through conduit - he gave me a funny look and said "No, Romex is not allowed in conduit." When I searched online, there seems to be a wide ...
1
vote
0answers
21 views

Replacing old below-grade sleeves/conduit

Our boiler lines and hot water lines are running from building to building through four 6" diameter sleeves (about 12ft long). They appear to be clay pipe but not sure. Anyway, rainwater now gets into ...
3
votes
1answer
100 views

Electrical Ditch Cover Inspection

Unincorporated Pierce County, Washington State, USA. We're covered under Washington State L&I for electrical inspections and I've been digging around their site but have failed to come up with an ...
2
votes
2answers
236 views

TV cables getting stuck in conduit after mounting TV on fireplace

We are first time home owners and trying to learn basic things. We mounted our TV ourselves yesterday. I'm now trying to hide the wires. There is already a rugged conduit (something like this) behind ...
2
votes
2answers
66 views

How to remove metal ring on flex conduit?

I'm replacing my electric car charging station with a newer version. The current one is fed from behind by flex conduit which is held in place with a metal ring. The ring is featureless and smooth (...
1
vote
3answers
161 views

What types of communication cables can pass through electrical conduit?

Originally asked at Network Engineering What types of communication cables can pass through electrical conduit? I believe that optical fiber is the only one possible. However, I'm not sure. I'm ...
5
votes
2answers
96 views

How can I drill conduit hole through plywood firestop I can't reach?

I'm trying to run a 3/4" conduit (1" OD) from unfinished basement utility room A to unfinished utility room B, through the ceiling of finished room C. There are several floor trusses which are easy ...
3
votes
1answer
195 views

Derating 6 current-carrying conductors?

I'm having a hard time understanding 310.15(B)(2)(a). Here's the boat I'm in: I hooking up a tankless water heater that calls for 3 40 amp breakers (it's a 24 kw Ecosmart). So I put in a sub panel in ...
2
votes
1answer
4k views

Is PVC conduit OK above ground to hook up a Jacuzzi?

We are hooking up a Jacuzzi and need to run # 8 wire above ground What PVC should we use to run under our house to get to the back yard? I have read Schedule 80 PVC will work.
0
votes
1answer
39 views

wire size for 140` run

I'm going to wire a sub-panel 140 ft from the main service. I would like 70 amps to be available; the actual load won`t exceed 50 amps for now, but I may need more later. The problem is the wire ...
2
votes
1answer
56 views

What's the proper way to bond metallic signal wiring raceway?

I have a stud cavity through which I need to run some signal wiring that's sensitive to ingress noise. An industry-standard recommendation is to run the wiring in properly bonded metal conduit (...
2
votes
2answers
589 views

Electrical design for a house with an ADU, solar, and backup generator

I recently moved into a fixer-upper house, and have some questions about how to go about (re)designing the electrical system in a way that meets my somewhat unique timeline and site requirements. ...
1
vote
1answer
127 views

Help running romex and conduit for new outlet through cold air return

I have two circuits right now that both terminate in the outlet box for the range hood/microwave. The one that goes into the box from above up in the second floor joists is a currently unused circuit (...
0
votes
1answer
64 views

Do you run a conduit under or over concrete wrap in the basement?

My basement concrete wall is covered with a concrete wrap and is anchored to the wall. The walls are unfinished. If you want to add an outlet down the wall to a workbench, do you run the conduit ...
1
vote
1answer
48 views

Weather proof connection from FMC to box

I usually use these clamp connectors to connect flexible metal conduit to a box: However, I am now installing a weather proof light fixture box outside of a shed (just surface mounting it, poking ...
0
votes
2answers
141 views

EMT Grounding requirements

I'am running 2" EMT from an outside enclosure through the exterior wall into a switch room that is being attached with beam clamps, The EMT is carrying a Fiber optic cable feed to the switch room that ...