device

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  1. J

    Using BS7671 to select protective device?

    Sorry for the vague title:rolleyes: Is there a table in the big red book listing the types & ratings of protective devices available? I usually just use table 7.1 in the OSG & I've had a trawl through chapter 5 & appendix 4 but can't find one:o
  2. D

    shower protection help.

    Hi all I am new to this so please be patient with me.. I have a 10.5 kw Shower with a supply of 230 v The power triangle equates that a 45.65 A protection is required. The shower is wired in 10mm t&e approx 10 meters from the cu. The problem i have is that the volex board i have only...
    • deano12929
    • Thread
    • aus cable current device help protection question shower
    • Replies: 10
    • Forum: Australia
  3. S

    Pressure relief valve and pressure relief device

    What is the difference between transformer over pressure relief device and transformer over pressure relay?
    • speedtronic
    • Thread
    • aus device pressure valve
    • Replies: 2
    • Forum: Australia
  4. M

    800amp main switch

    hi,folks i need some help i have a 800amp main incomming over current switch with a bolt on earth leakage current relay,that seem to be tripping in bad weather ie when lightning is around,the site has 12 other sub boards none of which have the same device. my question is does anyone else think...
    • mazo
    • Thread
    • canada current device earth lightning main main switch other switch
    • Replies: 3
    • Forum: Canada
  5. M

    Primary supply over current device

    Hi,, Can any one help me out.. Primary supply over current device rating 60A no other details on it..... is it 1361 or BS88? Pllease can also explain max demand on 60A and it's breaking capicity as well as type. Many Thanks:confused:
  6. N

    Supply Protective Device

    You come to fill in the section of a PIR entitled "Supply Protective Device" but the supply protective device is sealed. Do you: a) Break the seal to examin the device? (you are not allowed to break the seal!) b) Take a guess, but in that case do you enter 60, 80 or 100 for the rated...
  7. S

    Primary supply overcurrent protective Device

    While completing the Elecsa certificate, it asked for the nominal current rating and short-circuit capacity of the primary supply overcurrent protective device. The system is a TNC-S and there is nothing written on the fuse at all to say what rating it is. Also it is riveted and it cannot be...

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