Questions tagged [underground]

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1answer
54 views

How do I connect underground PVC pipe holding wire to rigid conduit?

I am planning to add a (GFCI) receptacle on a fence post, which is 45m from the garage (power feed). I plan to use NMWU 12/2 cable run in a PVC water pipe (or flexible cable protector) and the risers ...
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1answer
83 views

What size wire for a 300' run to a 60A sub-panel?

I am going to be running wire underground to my shack about 300' away. I will need a 30amp a 20 amp and a 10 amp at the sub panel at the shack so 60 amps total. I assume I am going to need a 2 pole 60 ...
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0answers
24 views

Extend underground rainwater drain pipe down hill

I need to extend an underground drain pipe. The current pipe is underground a few inches and ends at the top of a hill that's a few feet tall. The hill is angled at (perhaps) 35 degrees. The current ...
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2answers
72 views

How to find underground cavities below properry?

I purchased land in an area that was near a former mine. From geological maps, I see the official location of the mine is several blocks away from my property, however, locals told me there were ...
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1answer
137 views

Running a 50amp 240V line 300 feet to a shed

I'm looking to run a 50 amp 240v line to a shed 300 feet from my house. I have been looking around and reading a lot. Based on this website for voltage drop I need 4awg, to have a less than 3% drop ...
2
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1answer
96 views

What is this tank?

There was a spigot that was randomly in our yard when we first moved in a couple months ago. Now that the weather is somewhat warmer, I decided to finally dig it up and find the source of water. While ...
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2answers
65 views

Side penetration on an underground pull box?

Can you make a side penetration in an underground quazite pull box 25"x30"x12"? If yes or no what codes back it up?
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3answers
301 views

Wiring for outdoor GFCI receptacle in my garden

I have dug my trench. I want to use FMC (flexible metal conduit) since some of my trench is only 8-12 inches deep. I need to know what wires I need inside my conduit. Do I just need a black, white and ...
13
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2answers
4k views

What metal is most suitable for a ladder submerged in an underground water tank?

I need a ladder in my underground water tank at home, to enable easy access for cleaning and maintenance operations. The water from the underground tank is used for drinking, apart from other ...
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0answers
26 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 ...
2
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2answers
1k views

Removing pole and concrete base from yard

I debated between putting this question here or on SE Gardening and Landscape, but I think this question will be a better fit for this site... Let me know if I need to move it. So I'm now leading ...
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0answers
32 views

Running easily replaceable water line underground

I'm running a trench out to my shed for electrical. I'd like to use the same trench for a water line so I can have a spigot back there, and possibly future sprinklers. I'd also like to make it fairly ...
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1answer
50 views

PVC leak under slab in outdoor waterfall feature

I've searched the internet for a solution to my problem and I can't find anything that even references a potential fix. Maybe one doesn't even exist, but I have to try, right? So, here is my problem....
2
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1answer
109 views

GFCI and other concerns for 1500 foot wiring run

I have the following: My house with 400a service A pond subpanel 300 feet away from house fed from 100a breaker A barn 500 feet from pond subpanel currently run by a 12v offgrid solar system that has ...
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2answers
95 views

Wrong voltages on underground cable

Asking for a friend who's not too big on the internet... ;-) Background: On a farm. 1000' underground three wire power run to a well. Buried about 3 feet down. There is about 200' of three black ...
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1answer
34 views

Leak in boiler system

Have concrete slabs heated with an HTP boiler. 4 manifolds (2 supply, 2 return w/shutoffs). Had a loss of pressure and low water pressure error on boiler. I have isolated the leaks off the manifolds. ...
2
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3answers
5k views

How bad is using a 200 amp breaker box on a mobile home that only has 100 amp underground wire?

I just found out my parents breaker box is 200 amp in there mobile home but the underground electrical service line is 100 amp. The mobile home park has existed since 1979 and landlord has said ...
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4answers
2k views

Will water damage a spliced coaxial cable?

I have some R6 coaxial cable that runs from the alley underground and into my house to provide high speed internet and TV service. The line was cut by mistake while digging in the backyard. I've ...
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1answer
44 views

Inground trashcan hinge

I am trying to search for the in ground trashcan hinge. I've tried searching online for the part but don't know the correct name of it. Very hard to come by locally. The lid where it attached is about ...
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0answers
40 views

Inground trashcan missing neck

I have two in ground trash cans that are missing the neck where the hinge attaches to the lid. When it rains, water gets in and fills the hole. I have a 32 gallon plastic trash can that I put in and ...
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3answers
5k views

How to bury electrical wiring

I know I can run indoor wire underground as long as it is protected in something, but can I use a water hose to run it through instead of conduit or PVC?
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2answers
440 views

Does the NEC regulate data cable bury depth?

Technically my jurisdiction follows the 2016 California Electric Code, but it's mostly just the 2016 NEC. Table 300.5 lists bury depths for various areas and wiring methods. Do these apply to data ...
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1answer
180 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 ...
3
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1answer
406 views

Have Shed/Man Cave & Need Unground Power Advice

I have a shed which is a little less than 100 feet from my home breaker box. I currently am poor-manning it running a 100 foot extension cord out there. I have already purchased a branch electrical ...
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2answers
229 views

Placing wooden box underground; how to protect?

I'm getting ready to start working on my property this summer and instead of hauling a bunch of tools back and forth all the time, I'm going to build a large wooden box to keep all that stuff ...
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2answers
250 views

Can I use a ground rod as an equipment ground for a detached garage?

I'm in a bit of a dilemma. The house we bought has a detached garage supplied by 12/3 UF with ground. The previous owner/handyman set this up as a multiwire branch circuit (MWBC) with a twist: one ...
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0answers
817 views

wiring up new detached garage

K.I.S.S. Keep it simple stupid. Please remember this when responding because I have very little knowledge of home electrical, mechanic by trade. My House has a 200amp service panel House panel runs ...
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0answers
73 views

Department store PT GC lumber

I'm using pressure treated, ground contact lumber like this one bought from Home Depot for an outdoor project in my backyard. Parts of the lumber are buried underground, and some of the buried ends ...
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2answers
468 views

Cabin Wiring Plan Revisited

OK, So I’ve update my wiring plan … see images. I have more details now, such a part numbers, specifications and ratings, etc. I’ve consolidated much input from a couple of forums as well as Stack, ...
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2answers
2k views

Code for Buried Comms Cable

Are there any code requirements for buried communications cable (coax for TV/Internet)? Rockdale County, GA if it makes a difference. I have some jokers contractors at my house today who are supposed ...
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2answers
4k views

Running Cable Underground in PVC Conduit - Do I bond the PVC segments before pulling the wire through?

I have the PVC segments with the flanges at one end, and a relatively short (under 50ft) run, but its very bendy at the ends. My initial thought was to pull the cable through the pieces one by one, ...
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1answer
109 views

Future underground electrical supply

We are about to start on a phased plan to landscape our back yard. Phase one calls for a driveway to be poured behind our house, which will cross the entire property and connect two shared driveways ...
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1answer
723 views

Should I install a grounding rod near my light post to protect against lightning?

We have a very old house, which has had an old run of electrical cable (2-wire) from the basement about 40ft to a lamp post that has been unused. The old cable has been disconnected, and the current ...
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1answer
441 views

Is underground electrical cable underwater capable?

Is electrical cable that is rated for installation underground, also capable of being laid underwater? Through a stream or across a pond? Also, please make sure to mention if it is possibly but not ...
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1answer
5k views

PEX vs PE coiled pipe for underground use

I couldn't find exactly a direct answer; what should be used for an outside, buried water line? I've seen mention of using PEX, but had the black polyethylene pipe recommended. I'm curious because I ...
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0answers
57 views

Spacing of underground pipes with differing freezing points

I need to run a variety of electrical and plumbing from my house several hundred feet to the site of my future pool and pool shed. Included in this is geothermal piping, connecting my house geothermal ...
3
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1answer
2k views

Found PVC while digging, what is the purpose of the pipe I hit?

So I didn't call before I started digging because I was replacing an existing fence and I just made the assumption there would be any issue in moving the post hole a little bit. As luck would have it ...
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1answer
351 views

Underground electrical to garage - burying depth?

How deep does schedule 40 PVC conduit need to be buried for 30 amp electrical service from house to garage?
4
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1answer
5k views

Seeking good method to locate short on buried AC power cable

We have experienced a failure or short in one leg of a buried 3 wire 2.0-gauge aluminum cable that runs 150’ from our house to a detached garage (2 hots and a neutral, no ground -USE-2 RHH 60 MIL XLP)....
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2answers
309 views

Reduce speed of existing well pump

My existing well pump (at 550 ft deep) is a nearly brand new (installed last July) 3 wire pump and I do not want to replace it. However, I now have a 1500 gallon underground cistern in which to store ...
2
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1answer
1k views

Can I route a drain pipe under a gas line?

I want to reroute an outdoor drain pipe (rain water) to a better location but there is a gas line that is in the path that the drain pipe needs to go. Can I route the pipe below the gas line? I'm open ...
2
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1answer
145 views

running heat ducts outdoors

I'm building a small (160 square feet) granny flat about 20' away from our main house. Our main house has a great blend of pellet stove + solar collection to keep the home warm. Rather than run ...
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2answers
2k views

GFCI breaker with GFCI outlets trip with no load

This is my first time posting here. I hope someone can give me some help. The issue I have is new construction wiring for a driveway light and outdoor outlets at the head of the driveway. The ...
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2answers
2k views

What kind of pipe nipple to use on my well pitless adapter

I am working on the water pipe that connects to the pitless adapter on my well casing. There is a 1 in black pipe nipple that is screwed into the brass female thread of the pitless adapter. I have a ...
0
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1answer
202 views

How can I run a line under a cement sidewalk

What's a good way run a length of 2" PVC underground from one side of the porch to the other. I'd use it as a culvert to route a garden hose in the long term. The cement step and walk are 4' wide. ...
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1answer
186 views

How serious is building subsidence

I own a flat in the UK, in which I live. I own it. It's part of a block of 50 flats. I have learned recently that there was a subsidence problem. A large tree has been drinking the water from under ...
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0answers
266 views

Nicked and exposed UF cable exits house underground

While digging a hole to plant a bush, I hit the cable supplying power to our lamp post. Due to erosion over the past 40 years, the cable was barely covered with earth, and is now partially exposed in ...
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1answer
609 views

Running multiple UF wires in a single trench

I'm taking power from a 100 amp subpanel in an outbuilding and running three branch circuits: two to small outbuildings for lights, one to a horse waterer that draws 1.5 amps. Two questions: can I run ...
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2answers
454 views

Help identify (abandoned?) buried line

I have a pipe of some kind buried about 6" below grade in my backyard. Photos are provided below. I have no idea what this line might be, and was hoping to solicit ideas. Whatever it is, it appears to ...
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1answer
990 views

What's the best way to track buried electrical wire that's not live?

We bought a house that has light posts in the yard, scattered across 100 feet or so. I know there is buried wiring (probably no more than 12" deep) that supplies these lights, but this is a crazy old ...