Questions tagged [underground]

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13
votes
2answers
3k 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 ...
10
votes
3answers
4k 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?
6
votes
3answers
833 views

What's the easiest way to cut a chunk out of a buried railroad tie?

I'm in the process of digging holes for concrete piers (for a small deck - nothing fancy) and on my last hole I came across what appears to be an underground railroad tie (or some other huge piece of ...
6
votes
1answer
16k views

Can I run a 50 amp circuit underground?

I need to run a 50 amp circuit (120/240V) from a shed to a travel trailer that is permanently in place. The previous trailer had 30 amp 120V service running underground to a mounted/covered outlet ...
6
votes
2answers
36k views

Buying a House On Underground Spring. What to do?

My fiancé and I are under contract on a new home which we are concerned it might be built on an underground spring. There are two sump pumps in the house, on opposite corners of the house. Both times ...
5
votes
2answers
193 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 ...
4
votes
1answer
3k 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 ...
4
votes
1answer
2k 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)....
4
votes
1answer
1k views

Conduit Underground - Ways for tunneling under obstructions?

I'm running into a situation where it's increasingly difficult to bury this PVC underground 18" in some spots due to massive tree roots. Changing directions and/or destroying the roots isn't an option....
4
votes
1answer
357 views

How can I run plumbing from house to a nearby new office 1.5m away?

I am building a new office next to the house; it is about 1.5m away. I need to run, from the house's upstairs bathroom, 1 hot, 1 cold, and radiator with return (all of which I believe are 28mm to ...
3
votes
1answer
3k views

What is the best way to run underground electrical and low voltage in the same trench?

I'm putting in a couple of new electrical lines for my back yard. I have a trench dug from point A, to B, to C, etc.. I then had a bright idea. Why don't I put speaker wires and CAT6 under ground ...
3
votes
1answer
189 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 ...
3
votes
2answers
5k views

What are the code requirements for crossing a buried LPG line with an electric line?

Trenching for 1" Non-Metallic Liquidtight Conduit Type LFNC-B with 18" cover (10-3 W/G UF wire installed, 240V with 30A breaker) to serve a well. Just bumped into LPG line crossing conduit's path at ...
3
votes
1answer
752 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 ...
3
votes
2answers
2k views

How often do sewer lines collapse?

I have the opportunity to add some coverage to my insurance that would cover a sewer line collapse (amongst other issues with underground services). Is there any rule of thumb as to how long they ...
3
votes
2answers
1k 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 ...
2
votes
4answers
335 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 ...
2
votes
3answers
1k 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 ...
2
votes
2answers
93 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 ...
2
votes
1answer
112 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
votes
1answer
64 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 ...
2
votes
1answer
79 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 ...
2
votes
1answer
648 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
votes
1answer
437 views

How to prevent an exterior automatic watering system from freezing

I'm looking for solutions on preventing automatic watering systems for horses from freezing. The faucet is 150-200 feet away from where I'm building my horse's pasture. I live in New Jersey so I'm ...
2
votes
0answers
55 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 ...
1
vote
2answers
2k views

Can I build an electrical pole structure to hold a power wire into my property?

The power pole to my house is at the back right corner of the property. However, it's a little outside my property line. I wanted to run a power line straight down along the pole and into the ground ...
1
vote
1answer
101 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 ...
1
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2answers
82 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 ...
1
vote
2answers
125 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 ...
1
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2answers
316 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, ...
1
vote
1answer
166 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 ...
1
vote
2answers
322 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 ...
1
vote
2answers
561 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 ...
1
vote
1answer
495 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 ...
1
vote
2answers
5k views

What is the maximum depth below grade for termite activity?

I'm endlessly revising my perimeter footing insulation project and need to know: how far below grade do subterranean termites tunnel? These would be normal subterraneans, not formosans. For some ...
1
vote
1answer
37 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....
1
vote
1answer
82 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 ...
1
vote
2answers
88 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 ...
1
vote
2answers
1k 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 ...
1
vote
1answer
348 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 ...
1
vote
1answer
827 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 ...
1
vote
1answer
4k views

Where could the water be coming from found in this hole my dogs dug?

My puppies have been digging in our yard mainly one specific area for awhile. The other day I noticed my puppy's feet were wet. I went to the hole and found water had filled in. It is only about a 1 ...
1
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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 ...
1
vote
0answers
36 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 ...
1
vote
0answers
53 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 ...
1
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0answers
41k views

What size wire do I need for a 100amp underground 300 ft run?

I want to put in a 100amp subpanel in my garage. The run will be underground and 300ft long. I have a Siemens panel with breakers rated at 60/75 deg C. What is the proper wire size I need? I was ...
0
votes
2answers
2k 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, ...
0
votes
1answer
148 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 ...
0
votes
1answer
372 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
369 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 ...