disconnection | Page 6

disconnection

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  1. P

    disconnection times

    guys, don't have my regs book handy at mo disconnection time for a tns system is 0.4 sec is'nt it
  2. scotsparky

    Max Zs for sub mains

    Anybody know where the chart for a BSEN 60947-2 Btype mcb are in the BRB?
  3. K

    Testing tt system

    Hi guys did a perodic test on a house today, was a tt system, all readings were coming back 493 ohms to 503 ohms which seems a little high to me. however max zs on tt systems on various mcb is not in the regs book, so what do you guys put in for you max zs??? do the above reading seem high...
  4. E

    disconnection time permitted for protective devices?

    what is the disconnection time of the protective devices protecting : a) a socket outlet circuit b) a fixed water heater circuit?
  5. michaelw6

    REF LINKS firstly for max disconnection times.

    Im always every night of every day of every week, on my pc doing my head in QUOTES. But on this occasion im actually doing an minor works. One thing that i never have on me at home is my onsite guide or regs book so id like to know if anyone knows any links to various places for info... First...
  6. E

    Disconnection times

    On a TNCS system is the disconnection time .4 for all circuits of 32a and below as specified by 411.3.2.2 Table 41.1. I was sure that fixed appliances were rated at 5s ( lights, immersion heaters and the like). Please correct me me if I am wrong
  7. D

    Disconnection time

    Easy one for you guys! Can someone confirm what is the required disconnection time for a general 6a lighting circuit is, Thanks
  8. D

    Disconnection time - Urgent help needed

    Hi guys!, could anyone tell me the disconnection time and maximum Zs from bs 7671 for a three phase supply on a bs 88 20amp Thanks in advance
  9. N

    Disconnection time

    Is there any table on the IEE Regulations that shows you the disconnection time (TT-system) for a socket-outlet circuit and fixed water heater circuit?

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