Questions tagged [underground]

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Restoring collapsed buried pex line?

I installed a pex water line to an outbuilding several years ago, about 150' long, buried in 18" trench. The line was disconnected for over 3 years and I recently reconnected it and no water is ...
user15741's user avatar
  • 226
6 votes
1 answer
611 views

How do I repair a buried UF cable sheath?

I have a UF cable running a 20amp circuit from my house to a shed in NJ. Probably at least 30 years old, house is 50 yo. Just bought it. Today while digging a drainage trench I found out the hard way ...
Brandon's user avatar
  • 61
9 votes
2 answers
3k views

Are unions considered harmful to plumbing?

Disclaimer, I have pulled all the permits, I already passed several inspections, my jurisdiction is happy to have the homeowner do their work. I need to connect two underground PE gas lines downstream ...
Alessio Sangalli's user avatar
1 vote
2 answers
117 views

Relevant NPFA 70 sections for consideration when sizing a deep well pump

Previously I had little experience with well pumps, but after moving into a home with a failed pump in an area where a shallow pump is at 500', I'm beginning to learn a lot. Recently a pump servicing ...
mreff555's user avatar
  • 1,277
4 votes
1 answer
742 views

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 ...
Frank's user avatar
  • 346
1 vote
1 answer
148 views

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 ...
blackroses's user avatar
-1 votes
1 answer
131 views

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 ...
vr00n's user avatar
  • 101
2 votes
2 answers
117 views

Can this subpanel's feeder be used for a replacement panel?

As described in my other question about this barn's flooring, there's an electric feeder supplying an out-of-service subpanel and circuits in a barn that is hardly enclosed anymore. I want to know if ...
cr0's user avatar
  • 1,367
5 votes
1 answer
341 views

How can I repair an underground gutter drain pipe broken at the face of a concrete slab?

I can't use couplers because there's cement around the pvc pipes. Its cracked right to the curb. How do I fix it?
Bryan's user avatar
  • 51
11 votes
5 answers
2k views

Hole dug from underneath basement floor [closed]

Something has chewed or clawed its way through the basement floor. Our basement is underground obviously. What would be 5 or more feet underneath the ground and chew through a concrete floor? I found ...
Debbie Day's user avatar
0 votes
4 answers
3k views

Can I put CAT-6 ethernet in the same conduit as power wires? [duplicate]

I am going to run an underground 50 amp circuit to my detached garage for an EV charger. The distance from the house electric panel and the garage is about 60 feet. I was planning on putting the ...
Ron A's user avatar
  • 1
6 votes
3 answers
1k views

Burying multiple circuits in one trench

I'm in the process of running a circuit from the panel in my garage to an equipment area for a koi pond I built. Because of some rock at about 16 inches depth in part of the run, I'm taking advantage ...
Chris's user avatar
  • 63
0 votes
1 answer
78 views

electrical feed to fish cleaning station

I have a fish cleaning station with a light and a GFCI receptacle. The GFCI feeds the outdoor floodlight that keeps tugboats from running into the pier. Should the circuit be fed by a GFCI breaker. ...
ctaylor's user avatar
0 votes
1 answer
957 views

Is it ok to split the hose bib for underground irrigation

I'd like to install an underground irrigation system for 4 zones. There are 6 - 7 sprinkler heads with Hunter MP rotator nozzle per zone. The main poly pipe will be 1" and it runs to the most 1/2&...
Kuraudo's user avatar
2 votes
1 answer
35 views

Can I run AWG 3-way switch wire in same SCH80 conduit as my feeder cable?

I’m about to pull 200’ of 2/0 AL THHN from one of my branch panels on my home out to a sub-panel in my new backyard shop. It occurred to me that it would be a good idea to wire a 3-way switch for the ...
FixinDad's user avatar
0 votes
1 answer
118 views

Running Power to My Garage [closed]

My spring project is to install electrical power to my new garage. There is about 20 foot gap between my house and the garage. The wiring will go underground. In the garage, I am planning the ...
Rich Stringer's user avatar
3 votes
1 answer
285 views

How important are square pipe cuts in Schedule 40 PVC electrical conduit?

I have an electrician installing 2-1/2” Schedule 40 PVC conduit and am not impressed with the cuts that his crew are making with a reciprocating saw. Some cuts are out of square by roughly 15 degrees. ...
Zachary Russell Heineman's user avatar
0 votes
2 answers
2k views

Type of wire needed for 250' run from 400 amp pedestal to 200 amp shop

We are looking to run underground power for 200 amp service to our new shop that is about 250' away using aluminum wire. We are looking at running the wire in conduit. Would we use THWN-2 wire for ...
John's user avatar
  • 1
3 votes
1 answer
721 views

Suitable run type for 4 gauge copper ground wire connecting buried grounding rods?

The earth ground for our circa 1968 outdoor electrical panel in California is apparently a single maybe 8 gauge(?) solid copper wire running from a capped galvanized pipe driven into the ground (50+ ...
Armand's user avatar
  • 4,428
0 votes
0 answers
67 views

Do copper water pipes split underground?

I'm trying to figure out where I may have a water leak. This is related to this question. I'm thinking capping and bypassing pipes is easy provide they do not split underground. Do/can they split ...
Rodo's user avatar
  • 533
1 vote
1 answer
1k views

Is the hissing sound of water the source point of the leak?

I have a water leak (I think) but no water leak anywhere in my condo. I heard the hissing noise a week ago and still no water anywhere. My condo is upstairs and my garage (and neighbor garage) below. ...
Rodo's user avatar
  • 533
4 votes
2 answers
617 views

What material pipe to carry water to a detached garage

Location: California. The water service to my house arrives with some sort of plastic material pipe (I would assume this is the original material used in the 70s when this house was built). I now plan ...
Alessio Sangalli's user avatar
1 vote
2 answers
8k views

UFB cable in conduit?

I have about 200' of UFB cable to run to a barn. Does it require conduit, and does it have to be grey electrical conduit or can it be 3/4 black plastic water pipe?
AKG's user avatar
  • 101
0 votes
1 answer
156 views

Should an open circuit underground UF cable show resistance?

There’s an underground 10-2 UF cable running to an old pump on my property. I was thinking about reusing the cable to run power to a light. Both ends of the cable are disconnected and I put a toner on ...
Kyle Reed's user avatar
24 votes
4 answers
11k views

Can I pour concrete over a PVC sewer pipe without damaging it?

I'm currently in the process of digging a hole in my front yard to install a flag pole. The dimensions of the hole are 16" deep and 24" in diameter. Once I reached my 16" depth, I ...
Randy's user avatar
  • 241
0 votes
2 answers
176 views

3 way switches / multiple buildings / no neutral or ground in conduit

I am installing two 3 way switches to control lights in my shed. I have 3/4" conduit in the ground between the two locations. I DO NOT want to run ground or neutral through the conduit. ...
Matt's user avatar
  • 1
0 votes
1 answer
605 views

Using 1.25" SCH 40 PVC pipe to protect hose for irrigation

I'm setting up a simple irrigation system on my farm to deliver water to my fruit trees. What I want to do is to run a hose (a simple garden hose) through 1.25" schedule 40 PVC pipe to protect ...
Dan's user avatar
  • 1
1 vote
1 answer
2k views

running underground electric service to shed on concrete slab

I've been searching for information on how to bring electrical service underground to a shed that will be sitting on a concrete slab 12" thick at the perimeter. The shed will sit about 6" in ...
mr blint's user avatar
  • 1,840
0 votes
1 answer
587 views

2 cables in same conduit

I am needing to run 2 underground 12/2 UB (gray wire) cables for a 20 amp pool pump and a 20 amp gfci socket. Can I run both cables through a single, buried 3/4” schedule 40 conduit?
Ian's user avatar
  • 1
12 votes
5 answers
3k views

Can I have utility location done well in advance of a fence project?

Disclaimer: Before any work is done I'm going to have all utility companies come out to properly mark the utility locations. I'm looking to get a fence installed by a fence company. However, in order ...
William's user avatar
  • 559
0 votes
2 answers
3k views

What kind of conduit should I use with UF-B to reduce depth of burial?

I currently have a 50' length of 14/2 UF-B. I only need to dig a 40' trench, but I know it should be buried 24" deep. That seems like it will be a lot of work to bury it that deep. It seems like ...
Andrew's user avatar
  • 337
0 votes
0 answers
71 views

burying 3 core cable in metal conduit

what is the BS7671 code for running 3core flexible cable in metal conduit that is buried underground. because the environment that i am in is sand. i know in the US they run PVC conduit when running a ...
Stephen Fincher's user avatar
1 vote
2 answers
261 views

Can I backfill without inspections using sight tubes?

What code section is it where you can use sight tubes in the trench to determine the depth of your installed conduit so we can backfill without inspection??
al boggess's user avatar
0 votes
3 answers
116 views

Precautions for a subterranean level

Although our house build is still several years away, we’ve started making decisions about it. I live in a tropical climate and have always felt a subterranean level makes great sense in terms of ...
Rob de Jonge's user avatar
5 votes
5 answers
4k views

What is this cable popping out of my lawn?

There's a black cable cutting diagonally across one side of my front lawn (askew to my house, not going towards it, also not going towards the local electric transformer or my neighbor's house). The ...
Foo Bar's user avatar
  • 392
0 votes
2 answers
868 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 ...
Nemo's user avatar
  • 31
1 vote
1 answer
7k 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 ...
dakota gavin's user avatar
2 votes
0 answers
48 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 ...
user1071847's user avatar
0 votes
2 answers
190 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 ...
Village's user avatar
  • 1,055
0 votes
1 answer
20k 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 ...
OFFLINEX's user avatar
2 votes
1 answer
102 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 ...
Jimenemex's user avatar
  • 105
0 votes
2 answers
441 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?
Lydia's user avatar
  • 11
0 votes
3 answers
4k 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 ...
Jason Good's user avatar
13 votes
2 answers
7k 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 ...
Bharat Khatri's user avatar
1 vote
0 answers
36 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 ...
NoTown Like Motown's user avatar
2 votes
2 answers
4k 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 ...
Steve-o169's user avatar
0 votes
0 answers
40 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 ...
Drew's user avatar
  • 911
1 vote
1 answer
81 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....
Jeff's user avatar
  • 11
2 votes
1 answer
243 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 ...
crazyjncsu's user avatar
1 vote
2 answers
216 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 ...
Mike Smith - MCT's user avatar