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  1. T83

    Electrical engineer with HVAC difficulties,Help plz!!

    Hello, Thank you guys a lot,I didn't know this thread was still going,I ended up contacting the mechanical people & they sent me the electrical data,it turned out they just put numbers without backing them with anything,I mean usually I am either given a table with minimum specifications of the...
  2. T83

    Connect many TV together

    Hello, I have a question, what do I need if I want to broadcast the channel on TVs at the same time & when I change one they all change like in a TV store. What is the connection? I mean are they all connected through a splitter to a DVD? or how it works? This is something I am asking out of...
  3. T83

    Electrical engineer with HVAC difficulties,Help plz!!

    Hello again, I just found out that I can convert the BTU/hr to ton & then use an estimate of 1.5 to 1.7 KVA/ton for a good estimation. So can somebody simply answer at the first part of my post. Thank you!
  4. T83

    Electrical engineer with HVAC difficulties,Help plz!!

    Hi !! I need some help,I am a fresh electrical engineer & I have been given a drawing for HVAC & I am having some difficulties. First of all, if I have a compressor written next to it "2 Nb. compressor" & it is feeding two Evaporator mini split,then does it mean I have two air conditions here...
  5. T83

    Pole Mounted Transformer

    Hello, I have a question can someone guide me to a website or pdf that talks about the pole mounted transformer ? What I am looking for is the following,I want to see if I have 400V phase to phase I want to know how many feeders I can have on a 160KVA pole mounted transformer & how the current...
  6. T83

    Underground cable,Road crossing,& Regulations

    Hello, dpc thank you for your input,I see where you are going with the cable being a utility & 7anoter4 I checked table 300-5 from the NEC 2008,according to the table I can install a cable at a depth of 600mm (24 inch). Guys I bought the NEC 2008 & the BS7671,do you recommend any material or...
  7. T83

    Underground cable,Road crossing,& Regulations

    Hello, I would like to know what are the regulations or requirements on the following issue,it can be related to any code none specific.In the case of a buried underground cable I have read once(can't remember where) & saw on many drawings that at a road crossing cables are installed in PVC...
  8. T83

    Outdoor Light Projectors & Earthing

    First of all,Thank you all for your replies!!!!Really appreciative!! ScottyUK I am sorry for not specifying,I live in the Middle East & the projects that we take here not only in my country but other Middle Eastern countries they don't care which code you are using as long as you are using...
  9. T83

    HELP Steet Light Design(Cable Size,Pole Out of Reach,Earth Pit)

    Thanks a lot 7anoter4 as usual,you basically replied to everything,I would like to ask you one thing,what do you think regarding the grounding of lighting poles with the armoring of the cable?
  10. T83

    Splitting a cable?

    Hello, Thanks a lot for the replies I understand what both of you are trying to say regarding the protection of the cable,but what is confusing me is the following;let's say the underground cable 2x10mm2 reaches a point where there is one load to the right and many loads to the left,according...
  11. T83

    Splitting a cable?

    Hello, I know this might sound silly to the majority,but let's say there is a buried underground cable of 2x10mm2,ok,now I want to split the cable into 2x2.5mm2 & let's say 2x4mm2,ok what is supposed to be available to split the cable,I often see the manhole then the cable goes in a T shape on...
  12. T83

    Outdoor Light Projectors & Earthing

    Hello, I would like to know if somebody installs outdoor light projectors on the boundaries of their building,do they need to be earthed? If yes,can they be earthed with the armoring of the cable or do they need an earth conductor? Thanks
  13. T83

    HELP Steet Light Design(Cable Size,Pole Out of Reach,Earth Pit)

    Hello & Merry Christmas to you all!!! For the first time ever I am working on a street light design and I have some questions and I will be extremely grateful to those that will help,I am gonna briefly explain about the project and I am going to attach a sketch for it so that you can further...
  14. T83

    Hydraulic Panel & Cathodic Protection sealine ???

    Hello ScottyUK and Slavag, ScottyUK and Slavag reagarding the cathodic protection it is as you both said for the prevention of corrosion on the pipeline I guess the square drawing in the substation is a Cathodic Rectifier,and Slavag I will also ask regarding corrosion in the appropriate...
  15. T83

    Hydraulic Panel & Cathodic Protection sealine ???

    Hello, There is a drawing of a substation in front of me for a liquid to gas plant.The plant is by the seaside and there are two equipment in the substation that I am clueless to what they are & I don't have any specs about them,I hoope you can help me out and guide me to some catlogs or data...
  16. T83

    HV/LV substation design,help

    7anoter4 Thank you a lot for your post time and the correction,I really appreciate it !! Have a nice day !
  17. T83

    HV/LV substation design,help

    Hello, I am a fresh graduate and I am faced up with the preliminary phases of a substation design,I am not really going to submit something myself,but still I have myown input.I am looking into a substation design from HV to LV and I would like to know the required equipment for such a design...
  18. T83

    RMA (Remote Alarm Module) ?

    Hello, I am not sure if this is the proper place to post,but I was looking at the drawing schematics of a fire alarm system and I saw in the pump room a RMA (Remote Alarm Module) it seems that the strobe light and alarm bell are connected to it,can somebody explain to me what is a RMA ? and...
  19. T83

    Lightning protection for LNG facility

    First things first,Thank you guys for your time ! Second of all,I got me a short summary of the NFPA 780 and it was really useful,there is a guy who suggested for me the "Lightning Protection Guide" from dehn you can find it at www.dehn.co.uk the material is for free,you will find in their...
  20. T83

    Lightning protection for LNG facility

    Hello, I have some questions regarding lightning protection for a LNG facility,I am a fresh graduate and don't worry I am not designing the project but still I want to know some stuff. Ok here it goes,I came across the drawings of a LNG project and they want to make a lightning protection...

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