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  1. Hellmooth

    Roller shutter door switch

    Hi just a quick question.......I have a switch which is being used for a roller shutter door, it simply has 1 wire for common and 1 each for up and down. I belled out between common and both directions to check it was working fine which it was, so it is working how it should.........it might...
  2. S

    Fuse head blank help

    Hi all thanks for taking the time to check in. basically I'm trying to source the plastic studs you sometimes find on main fuse heads after a knockout is taken out for extra tails to a sub board then later when removed there's an exposed hole with access to the live terminal.ive looked...
    • super
    • Thread
    • blank exposed fuse these times
    • Replies: 7
    • Forum: UK Electrical Forum
  3. R

    Worst times for being in the trade

    I got laid off from a decent firm about 4 and half years ago been self employed since then and managed to scrape along. Been out of work now since Christmas. Getting hacked off with the constant battle to try and pick up bits of work. My missus says I have to leave this trade and get a new...
    • ricardo123
    • Thread
    • being employed times trade worst years
    • Replies: 22
    • Forum: UK Electrical Forum
  4. Toby Kuhnert

    Max disconnection times for 50a shower circuit ?

    Hi guys, Just doing an EIC for a recent dis board change, I also installed a 50a (type b 60898) shower circuit for an 11.5KW shower. I am looking through my regs trying to find whether it comes under the 5s disconnection time...? I know 0.4s is for circuits less than 32A and non-distribution...
  5. R

    scam warning

    BE CAREFUL IF SHOPPING IN ASDA OR TESCO'S Just had this forwarded to me...................be Carefulout there Over the last month I have become a victim of a cleverEastern European scam while out shopping. Simply dropping into Asda for a bitof shopping turned out to be quite an experience...
  6. R

    Ac dc voltage

    I am trying to measure the voltage at two wires for a brake on a motor The supply comes via an inverter and via a computer This machine was bought with the motor missing and the motor supplier has asked if the supply to the brake is ac or dc Have measured it with two different meters and they...
    • Russ3541
    • Thread
    • motor roman times voltage volts
    • Replies: 4
    • Forum: UK Electrical Forum
  7. S

    Zs on rcbo

    Hi guys had a conversation with the boss in the office after work today about a zs I got on a 32A c type rcbo bs 61009, the earthing system is TN-C-S, he said he wasn't worried I got a zs reading of 0.90 even though a type c 32A rcbo has a max zs of 0.72 his words were "it's just like a TT...
  8. C

    RCBO Trip times very strange.

    Hi when testing an rcbo trip times with 2 vapour proof fittings switched on the times were 378 on times 1 and 154 on times 5 but when i test the rcbo with the vapour proof fittings switched off the times are 21 times 1 and 19 times 5 has anyone had this before. i am using a calibrated robin...
    • cdmh electrical
    • Thread
    • connected fittings loads rcbo strange times trip
    • Replies: 8
    • Forum: UK Electrical Forum
  9. J

    Calculate the min size of cpc giving consideration to disconnection times and thermal

    Hi everyone, On the drawing it says the system's TN-C-S with declared Ze = 0,008 Ω and prospective fault current declared as 50kA When I calculate If = Uo / Zs = 230 / 0,716 = 321 A . With this value there's no way to match with 10A curve at fig. 3A6 (appendix 3) But if I calculate the...
    • JuniorSparky
    • Thread
    • calculate cpc disconnection disconnection times size thermal times
    • Replies: 28
    • Forum: UK Electrical Forum
  10. A

    voltage optimisation in industry?

    Hi I looked in the forums for voltage optimisation And saw that at home, the average saves from voltage optimisation is around 8%, Do you know, what is the average save in industry? Thanks
    • avi
    • Thread
    • industry roman times voltage volts
    • Replies: 11
    • Forum: UK Electrical Forum
  11. G

    high readings at (some) socket outlets

    I'll be pulling the circuit apart anyway.. However, Thought Id run it past the forum before I do. Been testing today prior to CU change soon. When testing one of the 2 RFC's at the house all was going well, until i got very high readings at about 4/5 of the socket outlets upstairs. I was...

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