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 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 ...
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90amps from main to subpanel - PVC Conduit through stud to main panel
Looking to confirm that I can run my 2-2-2-4 aluminum feeder cable (good for 90amps) from outside via LB elbow into the location shown below, and into more PVC conduit through the studs, and into the ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 (...
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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 ...
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Daisy Chain Subpanels or Not?
I’m trying to run power to a well pump house/seed starting shed now, while also planning for a barn/shop several years in the future. I am wondering if I should have two separate circuits (a lot more ...
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What wire do I need to run from a 150amp main breaker to our subpanel 220 ft away underground in conduit?
We have a 400 amp service and with a 200 amp panel that feeds two sub panels and a 150 amp panel inside the main box that is currently unused. I'm looking to run that 150amp service to our shop which ...
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Transition 1 1/4" PVC conduit through soffit into an attic
I need to run 2 circuits (50A/240V stove outlet and 30A/240V heat pump water heater) as well as a water pipe bonding conductor along the outside of my house for about 16 feet. The conductors will come ...
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Can I run a travel wire back through the source conduit?
I am running a 120v lighting circuit where one of the light fixtures is between the breaker box and the switch. Can I run hot, neutral and ground to the switch, then run the travel wire back through ...
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Above ground (outdoor) UF-B cable and Conduit
We have a UF-B (12/2) cable run in PVC conduit above ground from panel onto a wall on a side of the house up to a point (fence comes then).
Then the conduit goes underground and 90-degree and emerges ...
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PG&E's Groundline distribution system [closed]
The other day I saw an article reporting how PG&E is planning to use "tech" to achieve its target to underground 10,000 miles.
They demo'ed something called a "Groundline ...
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Acceptable distance to pull four 8 gauge wires through 1 inch sch. 40 PVC conduit?
I am trying to figure out the acceptable distance to pull 4ea. 8 gauge wires through 1 inch sch. 40 PVC conduit. This conduit is carrying power from my house to my well pump. The trench has a few ...
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LB Conduit to interior wall 90 degree bend
I'm running 1 1/4" PVC conduit underground from my home's main panel over to a subpanel in an accessory structure. I'd like to have the conduit enter the structure low to the ground so it's not ...
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NEC 250.148: Can I splice separate circuit grounding wires to a junction box's grouding wire, resulting in a single grounding wire exiting the box?
Working on my first electrical project (laundry room conversion), so all of this is new to me.
I'm splicing one 20A and one 30A circuit within a steel junction box to transfer from NM-B to THWN-2 for ...
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Running conduit outside at ground level or just above it, what's allowed?
I am providing lighting and power for a pergola. A PVC conduit comes out of the ground about 18" from one of the posts, so I need to bridge that small gap.
NEC table 300.5 covers burial depth, ...
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How to terminate or transition starlink cable out of conduit
I’ve got low voltage starlink cable through conduit coming out of 1” liquid tite conduit to then wrap around a wall before coming into the house.(see pic) The conduit is too large and unsightly to ...
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Affixing conduit to vertical side of stucco parapet wall?
Need to run some conduit (likely liquid tight) across a flat roof for Starlink cable and was originally going to affix the conduit up on the parapet wall with typical cable clamps with screws but ...
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Do I need to install conduit?
I am running a new 100 sub panel about 8 ft. from the main. Do I need to run it through conduit if I am running it inside the wall?
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Can I upgrade NEMA10 to NEMA14 without replacing the NMC?
As noted previously, my stove is currently on a grandfathered hot-hot-neutral circuit. I really should replace that with one that includes safety ground.
Currently (sorry) this is fed by an NMC cable ...
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Dryer, laundry, bathroom in 3/4” flex FMC?
Can I have one 240V 30A circuit with 3x8AWG (clothes dryer) and two 20A circuits (washer and bathroom circuit, 120V with neutral each) together in one 3/4” flex SMC?
I believe so but I haven’t found a ...
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#3 / #5 THHN and 1-1/4" metal flex conduit for feeding 100A subpanel?
I'm installing a new 100A subpanel, about 10' away from the main panel (so no concerns about voltage drop). I believe all wire and terminals on the main + subpanels are rated for 75° or higher, so ...
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Do I really need to run so many parallel EMTs?
NEC gives max number of conductors for certain EMT conduit. For example, it’s 16x12AWG for a 3/4” conduit.
Now it turns out this is really not the limiting factor at all. It is de-rating.
Suppose I ...
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Electrical conduit outside house
I have a hot tub going in on my patio in back of home. Unfortunately my breaker panel is on opposite corner of home. It's a finished basement (walkout) so running cable inside to opposite end house ...
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Can you double up reducing washers?
I have a 1.25" opening in a junction box that I need to be 1/2".
Can I use a set of 1.25 to 3/4 AND a set of 3/4 to 1/2 stacked together to accomplish this (and meet code)?
Thanks you in ...
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Can I use flexible conduit on a basement pole?
I am working on installing a 220 outlet on a metal pole in my basement. I’ve run the 4-wire yellow Romex over to the top of the pole (used a running-board attached under the joists). Can I use non-...
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what type of connector should i use to go into an outdoor electrical box from a 1/2" threaded pipe coming out of the ground?
what type of connector should i use to go into an outdoor electrical box from a 1/2" threaded pipe coming out of the ground?
There are two pipes coming out of the ground - The thread is on the ...
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PVC conduit termination with a junction box
I’m running two 3/4” conduits coming in from the front yard into the house. I suppose I could use two lb conduit bodies for each conduit run but could I use an empty junction box (say 4x4x2) instead? ...
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Options for routing UF-B from exterior wall to interior load center
I have three 10/2 UF-B cables on an exterior wall that I'd like to route to my interior load center on the other side of the wall. I intend to bring the UF-B cables into the interior wall cavity and ...
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EMT fill capacity and derates mixing 14ga & 12ga
I have an existing 1/2" EMT conduit that has three switch runners, a hot for an unswitched outlet, a neutral and ground, for a total of six wires in 14ga THHN, all for the same 15 amp circuit.
I ...
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Solid or Stranded #10/2 THHN/THWN-2 for underground 120v branch ckt
We're just going to run a simple 120v 20amp branch circuit to a shed. 1/2" PVC conduit should be sufficiently large enough for #10/2 plus a #10 EGC. The shed is 140 ft away from a new 240v ...
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Can I run 6-3 Romex through 2ft. of 1” flexible non metalic conduit out of wall to EV charger?
Can I run 6-3 Romex through 2ft. of 1” flexible non metalic conduit out of wall to EV charger in garage? Romex will run from end of flexible conduit to 50amp breaker. Is a GFCI needed if charger is ...
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Accidentally dropped a screw down conduit
As part of my basement finishing project I installed a 100 amp sub panel by running 3-3-3-5 copper SER cable through 1.5" PVC conduit. After finishing the installation I accidentally dropped a ...
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How to paint outdoor conduit?
I want to paint my conduit on an old brick house entryway so that it blends in more - ideally a oil-rubbed brass or brown color to fit the historical character.
How would I apply the paint - does it ...
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How disconnect bathroom exhaust fan from conduit?
I'm trying to remove an exhaust fan from the 1950s which is connected to some conduit. I'm used to having a box that things are connected to so I have never removed a direct conduit connection. I have ...
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How to safely terminate old wiring
I have old wiring going to the garage I want to remove. The wiring runs through old metal conduit in my basement, up the wall on my house and then crosses over to the garage..
I'd like to remove the ...
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Upgrading panel; running conduit from panel and transition to NM vs only NM
I'm in the planning phase of upgrading a 30 breaker panel to a 42 breaker panel (and re-doing all the circuits), and I'm trying to decide if it would be a better move to run conduit from the garage ...
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Is this the right grounding bushing for EMT? Am I using it wrong?
I was introduced to grounding bushings in this answer to a previous question of mine, but couldn't actually find them anywhere for weeks. Finally I bought this one off Amazon, and it arrived this week!...
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Best way to bring wire from flush-mount panel to surface-mount conduit
I often see people with a flush-mount panel in their garage who want to install some EV charger or NEMA 14-50 receptacle that requires new wiring from the panel.
Unless the desired charger / outlet ...
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Are there disadvantages to using aluminum instead of malleable iron conduit bodies with galvanized rigid conduit?
I've noticed that aluminum conduit bodies for rigid conduit are cheaper than malleable iron. Are there disadvantages to using aluminum conduit bodies instead of malleable iron ones with galvanized ...
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Size of conduit for two 4 gauge THHN and one 10 gauge ground wire
what size of FMC conduit I can use if I have two conductors that are 4 gauge THHN and one 10 gauge wire?
Thanks!
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Securing conduit to edge of stud
I’m looking for advice on how to bring this conduit run up to code, 2 issues in particular:
Securing the conduit to the end of the stud, which I believe is required within 3’ of the box. Are nail ...
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So just how hard is it to pull new wiring into a typical switch loop?
I'd like to install more home automation. Unfortunately at least half my house is wired with old switch loops which have no neutral in the box. I also have ceiling fans with lights on switch-looped ...
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