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  1. C

    Planning permission for 8kW commercial roof Northamptonshire

    We have the go ahead from a customer to install a 9 kW installation on a commercial building roof in Northamptonshire. The installation will be on a flat roof and the building is currently unoccupied. Will we need planning permission and if so how long does this normally take? In other words can...
  2. S

    Can't believe I'm asking a technical question at this stage...

    Hi, Can an installation with 2 x sma 1700 be submitted under g83/1 or would it be better in terms of DNO to go for dual mppt inverter in these bleak times? Thanks
  3. Energetic

    Micro inverters - Check with DNO

    I have been advised by WPD, my DNO that they are sending a letter advising all customers who notify with micro inverters that they must be disconnected untill a G83 compliance certificate can be provided for the whole install. A generic one for the unit is not acceptable. I have not done a...
  4. P

    Stage Lighting

    Hi all, Got myself some stage lighting to pat test in a small village hall. I've never done any before so I'm after a bit of advice. Is there anything I need to look out for? Do they need any sort of safety wire for example to stop them crashing to earth in the event of them falling? If so...
  5. Worcester

    AC Voltage Drop 250m run

    We've got a site where we're installing a 50kWp (3 phase) system on a barn and then feeding the main buildings 250m away. I've just gone through the BRB, and allowing for both the operating temperature and load factor, I got results of 95mm2 Cu and 120mm2 Al - this seems a bit on the large...
  6. S

    Signing off other people work?????

    Hello All I am new to this forum so bear with me. This is my situation, i hope you can help. I have an american friend who is an electrician in the states. He is here on a visa that means he can't earn money while he is here. But he is willing to rewire my house for me for free, except for...
  7. B

    Design Stage

    hi all could someone please explain to me why i need the follwing information at the design stage of an istallation - - Prospective earth fault current (I) - The value of external impedance (Ze) - Assumed current demand of the installation - Disconnection times of certain light fittings...
  8. S

    Anyone IET members?

    Just want to know if any or many on this forum are members of the IET? If so, what's the crack with it? Is it benficial/worth it? Recommended? Being a factory / automation / raggeddyarsed spark; would it benefit or promote? Just a passing interest in the cult... not the She Sells Sanctuary...
  9. S

    3 step test on ring final circuits

    hi guys n gals, just swotting up on some test procedures and im wondering how many of you do a 3 stage test on ring main circuits? i know from previous employers on a new build for instance, they just wanted me to get the end to end results and then go round to every socket and record which...

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