Standards of Electrical Wiring

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Standards of Electrical Wiring

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Viewing 19 posts - 1 through 19 (of 19 total)
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  • #519787
    Michael Gilligan
    Participant
      @michaelgilligan61133

      Our son is currently in Laos, and he sent me these photos for your delectation and delight:

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      29ae0ff2-5690-41f7-9870-1c9255e6594d.jpeg

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      538ab8cd-b787-4063-853e-0679f7a19a6d.jpeg

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      7a6d03b5-cbbf-4010-87de-c1b0bae6366c.jpeg

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      The location is : 17°57'21.2"N 102°38'13.3"E

      .

      .. which you can easily find on Google Earth

      The photos show the new, upgraded, installation surprise

      Perhaps one of the experts can identify the boxes …

      MichaelG.

      Edited By Michael Gilligan on 14/01/2021 15:40:39

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      #36233
      Michael Gilligan
      Participant
        @michaelgilligan61133
        #519789
        V8Eng
        Participant
          @v8eng

          Wow I would not even walk anywhere near it!

          Can’t wait to see what it looks like when EV charging points are added to that lot. 👹

          Edited By V8Eng on 14/01/2021 15:54:34

          #519790
          Brian Wood
          Participant
            @brianwood45127

            Frightening isn't it?

            Brian

            #519791
            Tony Pratt 1
            Participant
              @tonypratt1

              Makes my efforts look positively professional.wink 2

              #519793
              V8Eng
              Participant
                @v8eng

                And there was I worrying about the strange switch positioning for appliances in our new kitchen.😉

                #519802
                Emgee
                Participant
                  @emgee

                  They seem to have left some spare cable in case the communication cables needed re-terminating.!!!

                  Only guessing now but the boxes could be metered supplies with some kind of switch/mcb positioned at the bottom behind a hinged cover.

                  Emgee

                  #519805
                  Oily Rag
                  Participant
                    @oilyrag

                    Reminds me of the roadside 'cafe' (tent!) I came across in Vietnam. They had a bottled gas cooker, a table and 3 chairs, and a luxurious Coca Cola refrigerator full of chilled water bottles and local fizzy drinks. I wandered around the back of the 'cafe' to check where the electricity for the fridge was coming from as I could not hear a 'Genny' running. I followed a cable about 30 yards to an electric pylon where the bare ends of the cable were twisted around the power lines!

                    Amazing that the excess cable length hasn't been 'salvaged' yet.

                    #519810
                    Mark Rand
                    Participant
                      @markrand96270

                      Looks good to me. It's a real pain to have to put a joint in a cable when you do some new work because you did a nice neat job the first time and left no slack for adjustments. smiley

                      #519816
                      Tony Wright 1
                      Participant
                        @tonywright1

                        Street art !

                        #519851
                        Dave Halford
                        Participant
                          @davehalford22513

                          I quite like this one, and I have seen worse from the 90's. When his eyes light up it's the right circuit.

                          iragi.jpg

                          The last one just scares me.

                          atalayar_sistema el?ctrico en irak 2.jpg

                          Edited By Dave Halford on 14/01/2021 19:23:44

                          Edited By Dave Halford on 14/01/2021 19:28:00

                          Edited By Dave Halford on 14/01/2021 19:30:30

                          #519856
                          Mike Poole
                          Participant
                            @mikepoole82104

                            I expect they just get the circuit drawing out when there is a faultwink

                            Mike

                            #519858
                            Howard Lewis
                            Participant
                              @howardlewis46836

                              Different ships; different splices.

                              "It works dunnit?"

                              Acceptable mortality rates vary according to the part of the world under consideration.

                              For centuries, the custom in Persia (Now Iran ) was for folk to sit around a table, with a clloth large enough to cover their knees as well as the table. Beneath the table was a brazier so that the fire heated everyone.

                              That custom still lingered on. In 1985, but the brazier as a heat source had been superceded by a small electric fire element (Reminiscent of the little 750 watt Belling electric fire), with the element wound along a serpentine path in a fireclay "brick".

                              When the element burned through at some point, the technique was to identify the position of the break and to stand over it dropping paper clips until, one fell and bridged the break. Switching off never seemed to be an option!

                              These were the same folk who would attempt to join any two things by screwing the parts together, seemingly irrespective of diameter or pitch "Its got a screw thread on it" was the regular response, despite threads in use including BSP, Unified and Metric

                              Howard

                              #519868
                              Meunier
                              Participant
                                @meunier

                                Back in the mid-seventies I was a frequent visitor to Tehran for installation and maint of message switching equipt.
                                With experience we removed the long-line connections to our equipment and installed connection blocks with auto type fuses before reconnection to our equipment. Instructions to the office staff that before reporting any line faults to the PTT they MUST disconnect the fuse links until the line was reported fixed.
                                This was because the PTT routinely used a Megger to test/fix line faults !
                                I narrowly missed avoided a full-time on-station Comms tech position in November 1978.
                                DaveD

                                reminiscent of the wiring shown above was the cabling atop telephone poles at the Haj terminal outside the old downtown airport in Jeddah.

                                Edited By Meunier on 14/01/2021 20:52:37

                                #519876
                                Robert Atkinson 2
                                Participant
                                  @robertatkinson2

                                  I was setting up a computer room at a school in Ghana few couple of years ago and I was getting shocks if I touched a computer and the metal bars on the windows (unglazed holes in wall). The wiring in the room actually looked quite decent and certainly had all the earths on the sockets connected. The teacher was unconcerned saying the students didn't mind! Further investigation showed that this newer building was wired to the main building with a length of flex supported by a wooden pole. The main building had an overhead 3 phase and neutral feed to an old MEM fuse box, No earth connection whatsoever. The school is on a sand dune so little point in even trying an earth rod. In the end I bonded all the window grilles together and to the ring main "earth" thus all exposed metal was equipotential.

                                  Went back the year before last to do some updates and found the school was suffering power outages. They thought it was the general area but eventually I convinced them it was just the scholl becuase I could see a broken cross bar on one of the power poles feeding the school but the shops across the main road had power. The school reported it, but nothing was done. I was then taken down to "explain" to the district power engineer, That got a crew on site who confirmed my diagnosis. The then put in a emegency supply. Thi consited of getting two rolls of 2.5mm2 single insulated wire, one red one black, connecting it to the feed side of a meter (on outside wall) of a shop across the road, running them across the road, connecting to a 13A socket in the middle of the pavement outside the school. No earth, no fuses. I then had an extension lead to the computer room…..

                                  Robert G8RPI.

                                  #519885
                                  Clive Hartland
                                  Participant
                                    @clivehartland94829

                                    Reminds me of Hong Kong with the side walks under the builing overhang, nice when it rained.

                                    On the ceiling of the overhang were bare 3 phase wiring so that a shop/house could connect easily.

                                    Opposite where I worked was a Rubber shoe factory and they had a fire, up comes the fire brigade and connected up the hoses and directed the water into the building and hit the 3 phase cables under the overhang, flash, bang and all the lights went out over quite an area. We could do nothing as we had a 3 mtr high fence there between us. 3 or 4 people were electrocuted. Mostly recovered whle we watched. sadly 1 girl died of smoke inhalation in the building.

                                    #519914
                                    DC31k
                                    Participant
                                      @dc31k
                                      Posted by Michael Gilligan on 14/01/2021 15:39:11:

                                      …identify the boxes …

                                      The set up is similar to what I have seen in Ghana. The box is the electricity meter. This design seems to have a breaker integrated into the lower part of it. Generally, these are pre-pay meters. You go to the local agent with the meter number, pay your money and the meter credit is sent to the meter over the ether. The fat cable going in to the right is the electricity company's supply. The skinny cables are going to the property.

                                      It is cheaper for the electricity company this way as they do not have to run their cable to each property: they give you a connected meter where they want to and you have to do the rest. Where it is situated also gives the best chance of it receiving the top-up credit signal rather than being up a narrow, dark alley at ground floor with three flats above it. It also minimises the risk of someone tapping into the supply cable before the meter.

                                      #519916
                                      Michael Gilligan
                                      Participant
                                        @michaelgilligan61133
                                        Posted by DC31k on 15/01/2021 09:13:07:

                                        Posted by Michael Gilligan on 14/01/2021 15:39:11:

                                        …identify the boxes …

                                        The set up is similar to what I have seen in Ghana. The box is the electricity meter.

                                        […]

                                        .

                                        Thanks for the info. … it starts to make sense now !
                                         

                                        Other parts of the Laos grid look considerably tidier :

                                        https://www.tdworld.com/overhead-transmission/article/20963781/laos-expands-the-grid

                                        MichaelG.

                                        Edited By Michael Gilligan on 15/01/2021 09:33:33

                                        #519939
                                        Hopper
                                        Participant
                                          @hopper

                                          I saw some good examples in Kathmandu, Nepal, two years ago. (Sigh, remember when we could go places?)

                                          Sorry about the sideways orientation of the first pic. Its ok on my computer but I cant change it. Maybe mods can?

                                           

                                          20190106_102901.jpg

                                          20190107_105740.jpg

                                          img-20190112-wa0002.jpg

                                          The streets are as hazardous as the wires above! All thoughts of renting a motorbike went out the window when I saw the combination of dealing with chaotic traffic while riding on a surface akin to a motocross track strewn with concrete blocks and boulders and potholes big enough to bust a wheel. This is actually a rare good bit with a strip asphalt down the middle to fight over.

                                          Edited By Hopper on 15/01/2021 11:28:54

                                          Edited By Hopper on 15/01/2021 11:32:53

                                          Edited By SillyOldDuffer on 16/01/2021 10:20:51

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