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Underground cables and retaining wall

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  • Underground cables and retaining wall

    The plan is to one day replace my retaining wall. Currently there is a Foxtel (now NBN) and phone line in a white underground conduit running from the street under the shed and though the retaining wall to the house. The conduit is not very deep in parts. Under the shed and lowest part of the retaining wall is 200mm deep, I believe it should be at least 350mm deep. From the ground the conduit runs diagonally up thought the retaining wall to the house.
    If I do replace or remove part of the retaining wall the conduit/cabling will be to short.
    Does anyone know if Telstra or NBN would rerun the cable due to not be run deep enough in the first place (from the early 90s) at their cost or I would I have to pay for it?

    DSC_0295.jpgDSC_0296.jpg

  • #2
    Why do you think it's not deep enough?

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    • #3
      Its power cables - I think its deep enough (correct me if I'm wrong). You'd have to pay I reckon.

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      • #4
        You need to remember it’s on their site of the network boundary. They can do what they like if they decide it’s ok. There is no “no deep enough”

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        • #5
          Telstra / NBN don't normally run cable on your land, they only concern themselves with the connection at the pole/pit and the connection at the house wall.
          You would get a certified electrician or otherwise to lay the cable and then you pay Telstra / NBN to connect at either end.
          I believe that service is around $300

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          • #6
            Check with the "Dial Before You Dig" site and they will tell you exactly what depth to there knowledge the cables are at. If you say the conduit is not at that depth it will be up to the installer to rectify. There is a standard but most of the work is done by contractors and they take shortcuts. An example that comes to mind is an NBN line that was supposed to go .5 meter under a creek bed but the contractor ran the bare cable 1 meter over the creek. The contractor had to go back and make it right at there cost.
            Another example was an NBN line that was according to dial before you dig buried .5 meter beside a concrete path. It turned out the contractor buried it in the gravel beside the concrete at a depth of 50mm. The contractor had to go back with an excavator to rectify. The info dial before you dig receives is what the contractor supplys and when there are variations between what they have to what is done, they respond.

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            • #7
              Some of the above isn’t true. Here you go https://www.telstra.com.au/consumer-...network-assets

              Steve if you can get someone at dial to even know where the lead in is. And make Telstra do a free reloc of a 25 year old asset I might have to give you a job

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              • #8
                I would say you will be up for payment. Just been through all this with cabling. AS3000 states 300 (I dont have a copy and I got it quoted as that) Check out https://www.nbnco.com.au/residential...he-nbn-network That will explain what the specs should be on the retaining wall.
                Power cables must be 600mm in orange conduit. Network and/or 12/24v in white conduit can be any depth - everyone was different - I laid at 400mm) Gas - 450mm. Drainage - 400mm. To save a ton of money you can dig yourself and get inspected by electrician, cabler and plumber before you back fill - saved 1.5k. Also really important to register with dial b4 you dig and find out where your cables are. When finished have the new cabling setuo printed out and put a copy in your electrical box
                Pinball Meets...I love em

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                • #9
                  Originally posted by Autosteve View Post
                  Check with the "Dial Before You Dig" site and they will tell you exactly what depth to there knowledge the cables are at. If you say the conduit is not at that depth it will be up to the installer to rectify. There is a standard but most of the work is done by contractors and they take shortcuts. An example that comes to mind is an NBN line that was supposed to go .5 meter under a creek bed but the contractor ran the bare cable 1 meter over the creek. The contractor had to go back and make it right at there cost.
                  Another example was an NBN line that was according to dial before you dig buried .5 meter beside a concrete path. It turned out the contractor buried it in the gravel beside the concrete at a depth of 50mm. The contractor had to go back with an excavator to rectify. The info dial before you dig receives is what the contractor supplys and when there are variations between what they have to what is done, they respond.

                  We had telstra do a 50mm trench,over a dead tree and around neighbours tree

                  Lasted 2 years lol
                  you can always expect change in life..except from vending machines

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                  • #10
                    Yer I must admit dial before you dig aren't exactly the most accurate but at least if you use there info and you strike a cable, your not at fault.
                    I used there resources on the farm because there is a set of old PMG signs going through one of the pine forests. A nice line of signs all stating PMG lines laid in this area. Dial before you dig had no knowledge of any such cable.
                    Funny story, we also have a high pressure gas pipe line going across the farm in a 10 meter wide cleared evsment. By high pressure I mean this gas line supplys natural gas to the east coast of Australia from Bass Straight. Well sign posted and when the guys come to clear any regrowth, they call me and I meet them on the day to provide access. One of the guys said, what ever you do don't hit the line. It is 1.5 meters down and if you need to dig for any reason, call us and we will come out and dig for you.
                    I stupidly asked, "how much would it cost if I was to hit the gas line?".
                    The guy says nothing, no cost to you at all. I said, " How come no charge?"
                    He says, " On account we wouldn't know which of the 1000 parts you will be blown to to charge"...

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                    • #11
                      We replaced a fence a few years ago. The telstra lines were originally run along the bottom rail. Same time I replaced the old sewer pipe.I put the new conduit in the same trench. Telstra ran new cables to mine & neighbours house. There is now a pit in my path. They did it at no cost to me
                      PIMP YOUR PINS

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                      • #12
                        Dial before you dig will only give you the location of the main services. Once it leaves the mains and enters your property there is no records only the sewer. Don't bother wasting your time about the depth either with your phone cable as its done by contractors and there is no depth regulations as the cables aren't dangerous. You will have to pay to get a telstra prefered contractor to do the job.

                        Sent from my SM-G950F using Tapatalk

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                        • #13
                          Originally posted by Plong View Post
                          Dial before you dig will only give you the location of the main services. Once it leaves the mains and enters your property there is no records only the sewer.
                          Correct. We did the same to try and locate services on our front lawn and all the reports did not show a single location on our property.
                          And even still, whats on paper vs what is physically in the ground are probably different. Our house plans show main storm water drain running underneath our concrete driveway out to street, when in actual fact (thankfully) it was on 45deg angle across our front lawn, as we had to get it dug up and repaired last year.

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                          • #14
                            Thanks everyone for your input and links, I have read them all and the links very helpful.

                            I did contact Dig before you dig but they only provided where my pit was out in the street I also contacted my local council but they had no records either. To find the cables I hired one of these.
                            https://www.kennards.com.au/pipe-cab...=801-1-2-99.95
                            Worked really well. It found the cables and told how deep they were.
                            If I do start work on the wall etc. I will ask a for asset relocation and tell them about the cables not being at least 300mm underground. If they move them at no cost its a bonus but if not well it was worth a try.

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                            • #15
                              Dig before you dig

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