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integrity

  1. Zdb

    High integrity earthing

    Only time I've done this has been using the two separate CPCs of a RFC using different terminals inside the D.B as per 543.7.1.204 I've been asked to test a load of high integrity radial circuits with two separate (different sized) CPCs. My question is, in the box which asks for the CSA of the...
  2. E

    High Integrity Earthing

    Hi Guy's, Need your take on a commercial office IT environment. I am getting earth leakage total of 26mA, okay, spread over 22 workstations & 4 Server & ups IT devices, not bad. The power RFCircuits are fortunately spread over a split load board / 2 RCD's. No nuisance tripping reported. Subject...
  3. GBDamo

    High integrity earthing.

    i understand the need, as I see it any circuit with a likelihood of more than 10 mA earth leakage should be subject to high integrity earthing. This requirement can be achieved by many methods and I can see the sense in some. Using RFCs instead of radials gives two paths so in the event of a...
  4. W

    IP Integrity question

    Hi , just after a bit of advice. A customer is asking me to put a small opening in the front of an IP 65 enclosure. He wants a clear lid (like what’s on front of a RCD enclosure) so he can just flip the lid up and adjust something if he needs to. I seem to remember seeing some spring loaded...
  5. B

    Creating high integrity ways in stacked cu

    Hi, just wondering if my plan is any good or if you've got a better way! I've got 2 10mm SWA sub mains going to outbuildings, currently fed from rcd protected ways on a stacked Hager CU. New boards in outbuildings all Rcbo units, so don't need or want RCD protection at house end. Main switch...
  6. DaveyD

    Rcbo

    Hi everyone. Im an electrician but I don't install PV I am doing some works and changing a cu. The customer already has pv fitted. There is no room to add a separate board and they have put a 16a mcb on the rcd side if the 16th edition board. TNC-S earthing arrangement. The cable is buried...
  7. R

    lack of high intergrity earthing on computer socket radials

    hi this installation was carried out in the 1995 ish advice please on what code should be issused for a server room and also floor sockets (althought server room and floor room are on sepearate circuits) wired in 2.5 / 1.5 TW&E as radials with no high integrity earth i.e only one earth...
  8. C

    Computer circuits please help

    Hi I'm new so sorry if in wrong section, I have been asked to wire up a test rig, the customer wants to put power in for a test rig with 40 double sockets to test computers, till systems and kvrs anyone any recommendations on best way of doing it...
  9. M

    High Integrity Earthing for computer sockets.

    Hello i have attached a picture of how i think a high integrity earth should be wired for computer sockets in a ring. I have a few questions to ask if possible please: 1) Is the additional 4mm earth necessary if the circuit is wired in a ring? If so does the additional 4mm cable need to be...
  10. T

    Rcbo and high integrity earthing cop out

    Would normally expect when wiring ring mains nowadays for data serving equipment to use high integrity earthing. Is the following true: If the following applies you don't have to do it: 1.Use of a Rcbo as long as the Rcbo is 30ma rated and the earth leakage current expected will not be greater...
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