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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932 views

Narrow conduit with 90 degree elbow - three thhn wires

Currently the narrow conduit (1 inch outside, so inside maybe 3/4 inch) has 2 wires (hot and hot switched). I want to include one neutral so I can change to a light switch outlet combo. It is an old (...
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1k views

interpretation of conduit vs raceway wet location vs outdoor vs NM NM-B

eventual question: for a sealed PVC conduit external to house, does that qualify as a wet or damp location preventing use of non metallic (NM or NM-B) indoor type wire? And does underground feeder (...
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2answers
11k views

EMT or PVC Conduit For Exterior Above Ground Electrical Run

I'm installing a garage on the side of my house furthest from the electrical box. I don't want to trench the entire distance (60 ft), so I am planning on running conduit along the exterior of my home ...
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356 views

Installing vertical EMT conduit crossing a horizontal eletrical run

The room i want to install some vertical EMT (for data cables) has a horizontal electrical wire (romex or something like it), about 8 or 10 inches from the floor, going across the entire wall as near ...
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1answer
806 views

How should I repair a broken exterior PVC outlet body?

We bought our new house back in June. I was doing some mouse-proofing this weekend and found this beauty: The wires are going out to our pool. Any suggestions on how best to approach fixing this? ...
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2k views

How do I install EMT conduit for an outdoor 6/4 power run?

I need to run NEMA 14-50 50A outlet from the breaker show to the garage (approximately 30') . From the red line, I plan to run 1" EMT conduit as show in the picture, four #6 wiring inside, 50A breaker ...
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1answer
515 views

Is there a way to find rebar in concrete walls?

I was wondering if there is a way to find the tie rods and also plastic electrical conduit in concrete walls. In Ecuador all walls are made from poured concrete and plastic conduit is run. But it all ...
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1answer
5k views

Any issue with running 240v and 120v THHN in the same conduit and can they share a ground?

Im running electrical for a mini split which requires a 240 line and there has to be a GFCI outlet near by so I'm running that too. The only way to get it there is through conduit (not buried) so I ...
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317 views

What should I do about damaged electrical conduit?

I'm adding an electrical line to my outdoor pool breaker box. I was digging near the box with a pickaxe (yeah, I know, stupid) and was trying to be careful, but I was not careful enough. I don't ...
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80 views

#8 THHN in Conduit for 50 amp circuits

I am installing a new electric point-of-presence hot water heater which requires 3 240v 50 amp circuits (6 hot wires, 1 earth ground). The water heater is roughly 50' from my panel. I would like to ...
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45 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 ...
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44 views

Type of conduit box to use for a Ring doorbell + keyed entry

I have a powered gate at the front of my property and its well overdue to replace/upgrade the intercom system. I would like to install a ring doorbell system and a keyswitch to open the gate. The ...
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2answers
579 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 ...
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1answer
64 views

how to replace surface conduit for a two-wire lighting circuit?

I have an old house with unswitched knob-and-tube running to a ceiling fixture. Previous owners ran surface conduit to a wall switch and to a second light fixture over the sink; none of this was ...
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1answer
2k views

125amp feed from garage to house, required wire size, PLUS a separate 3-way light switch

I recently built a detached garage with its own 200amp service. I made provisions to run a 125amp feeder from the garage to an addition we are now building on the house. My questions are: What size ...
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1answer
2k views

Code compliance - how do I pass EMT conduit through an interior wall?

I live in Fairfax, Virginia. I need to know how to pass 1/2 inch EMT conduit through an interior wall while complying with code. In more detail, I have a subpanel in an attached garage. From that ...
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1answer
113 views

How do I couple IMC underground?

The title, more or less, sums it up. I plan to bury some THHN/THWN-2 feeders, and my jurisdiction allows a 6" bury depth if I use IMC or RMC. I plan to use IMC, which comes with both a male and female ...
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1answer
1k views

Fastening THHN cable in junction box

I am installing an electrical subpanel in my garage and have a 2" PVC conduit run up approximately 5 feet from the panel through the ceiling to the garage attic. In the conduit i ran 2 12/2 NM romex ...
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2answers
116 views

conduit and wire size needed

Looking to hook up a new 20KW generator to an existing manual 200A transfer switch. What size copper wire do I need (2 hot legs, 1 neutral and one ground) and what size PVC conduit do I need for all ...
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685 views

Running wires through conduit on outside of house to feed garage sub panel

My electrical panel is in the basement on the west end of the house and my garage is on the east end. I had planned to run a 6/3NM-B cable along the joists and through the rim joist to get into my ...
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1answer
2k views

Ground wire with 1/2 EMT Conduit

Do I need to run a ground wire with conduit? I have installed a line of lights using 1/2 EMT and tied into another circuit that is grounded coming off the panel. There are about 7 lights in a ...
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1answer
412 views

Is it okay to use an LFNC whip to connect air conditioner where subject to physical damage?

I have seen many air conditioners at ground-level in multiple cities near me that are connected using liquid-tight non-flexible conduit (LFNC) whips. Example: http://www.southwire.com/products/whip-...
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1answer
52 views

Running 8/3 along strongback

I'm running a 220(240) 8/3 line for a table saw in my garage. I can fish the 8/3 to the box. I need to run the line to the other end of the garage. The other lines are run down the 1.5" side edge ...
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1answer
112 views

Adapting an outside wall outlet to suface mount conduit?

This was a previous question with some great answers. How can I adapt a wall outlet to suface mount conduit? One answer was: "There are collar boxes available that have conduit KO's (knockouts). Just ...
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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 ...
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861 views

In the UK, what type of flexible conduit should I use for electrics in shed that run underground and emerge through the concrete base?

In the UK, what type of flexible conduit should I use for electrics in shed that run underground and emerge through the concrete base? I see various standards quoted such as IP66. Would this be ...
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243 views

Can the sheath of nonmetallic cable be removed prior to entering electrical metallic tubing (EMT)?

Can 2 romex cables be stripped before entering an EMT to allow more conductors in a 1/2" EMT? How would you transition from Romex to individual conductors going in or out of the EMT? Or is that ...
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103 views

150A for outdoors kitchen - wire size

I am working with the city to get the permits to build an outdoors kitchen with its own sub-panel. I decided to place it 100ft from the house. In my list[*] I have an electric tankless water heater, ...
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1answer
52 views

What is the purpose of this black felt on end of oven conduit?

I bought an oven which I am installing (reference this post for details) and I'm confused by the black wrap at the end of the conduit shown in the picture below. Is the wrap there just to prevent ...
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1answer
116 views

How can I pull cable through wood and metal framing without damage?

I had to install a new wire for my water heater (higher amperage/bigger wire), and was drilling through the wooden top plate to snake the wire down the wall to the pass-through. Everything seemed ...
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186 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 ...
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22 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 ...
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3answers
163 views

How do you keep bugs/dust out of electrical conduit which terminates in the open?

Though it isn't specifically stated in the code, I try to protect cable that is installed less than 8 feet from the ground with conduit. This tends to be accepted by inspectors as "protection from ...
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269 views

Electrical code - Conduit requirements for 50A copper cable through outside wall

Can anyone advise what (if any) sized conduit one has to use per code to have a 50A copper cable run from inside through an outside, concrete, wall? I live in Maryland, USA, if that is helpful. Would ...
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253 views

When do you use an aluminum vs PVC service entrace cap (weatherhead)?

When installing an overhead power service entrance, you can choose between metal conduit with a metal weather-head, or PVC conduit with a PVC weather-head. Is this 100% a matter of preference, or are ...
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2answers
77 views

How to connect steel posts to build a shelf unit?

The posts or conduit needs to be galvanized as I'm using this for growing herbs. Im not sure if I would have to get this welded or if theres a simpler way to put something like this together. (...
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256 views

Is ideal clear pulling lube okay for pvc conduit

I'm pulling NM 6 gauge 3 conductor (plus ground) through a 1 inch pvc conduit. I'm wondering if Ideal Clear pulling lube is okay. It says it's okay for all wiring types, but not if it's okay for all ...
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908 views

How should I secure electrical wire to a cinderblock wall in a crawl space?

I just purchased a house that was built around 1995 and has a cinderblock foundation that is exposed under the deck. There is a detached workshop that is about 100ft from the house that gets its ...
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2answers
78 views

3-side punched steel channel (strut), image in the post - can't find any equivalents

I'm looking to install a hoist system mounted to garage ceiling. I was originally going to attach some 2x4s to the ceiling joists and attach pulleys to those, but then decided to go with steel ...
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6answers
892 views

3" conduit with many bends - is it worth to build it?

I am working on sending some cables (RG6, Cat5 and speaker cables) from basement to the attic. This is a typical 2-story house. After reading some posts found over the Internet, I am now considering ...
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2answers
104 views

Where can I find conduit bends less than 90degrees?

I'm about to run some conduit underground, and due to various obstacles can't do a dead-straight run. I certainly don't want to add 90degree turns due to the extra drag when pulling a cable though. ...
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4answers
1k views

Using PEX as wire conduit

I have some 1/2" PEX-AL-PEX left over and thinking about using it as conduit for ~20' ethernet or phone cable. Pipe is appropriately orange. Will the aluminium layer provide RF shielding? (assuming I ...
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3answers
117 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 ...
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1answer
78 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 ...
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1answer
92 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?
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2answers
2k views

What Size Conduit for 4AWG

I'm running a 60 amp circuit to provide power to my garage. It is about 70 ft in length, so I think I need to go with 4AWG to counter any resistance loss. I'll be pulling 4 wires (R,B,W,G) thru ...
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54 views

What is the cross-sectional area of solid, 14 AWG THHN wire?

I have found that stranded 14 AWG THHN is 6.258 sq mm, but I am having a hard time finding the value for solid 14 AWG THHN. I keep seeing 2.08 sq mm, but I find it hard to believe that the cross-...
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2answers
70 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....
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2answers
226 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 ...
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2answers
65 views

Can I use standard electrical cable from a waterproof junction box when replacing an exterior light

I am replacing a faulty exterior light with a waterproof (IP66) LED one with a PIR sensor. There is an existing conduit through the wall, but it is a thick stone wall of an outbuilding and the ...