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  1. T

    DNOs and G83 limit

    Guys, can I ask you all to reply to this thread with details for each DNO that you have had dealings with and their approach regarding the G83 16A limit - plus any info if you have seen that this has changed over time. The ENA have confirmed that the correct value to use for the G83 limit is...
  2. i=p/u

    single phase and 3 phase

    Q1.in most domestics its 230v and 100A main fuse. is there a limit on how many amps can be drawn when on 230v??????? could there be 500A drawn if cables are large enough Q2. as with 3phase 400v is there a limit on how many amps can be drawn??? maybe stupid question but just thinking , yas...
  3. T

    time limit on designs to 16th before being brought into service in 17th

    hope somebody can help ? i am wondering if there is a time limit on a new domestic installation designed to the 16th edition before it is installed and completed. 17th edition regs only state that all installations designed after 1st july 2008 must comply with 17th edition. but what about what...
  4. W

    Cable length limit from table 7.1

    Evening all Hopeully someone can help me get my head around this. I'm looking at table 7.1 OSG. For the 1361/3036 45A radials on a TN-S system the limiting factor is sc, which means its limited by the line to neutral loop impedance (short circuit). But the TNC-S it isn't. Can't see what the...
  5. O

    immersion high limit cut out

    Watched the NIEC DVD on periodic testing and he mentioned the immersion does not have a high temperature cut out fited. Can anyone give me some clarification on this as the average immersion heater has a control stat fitted but not a combined control/high temp stat. So if for example you come...
  6. B

    2391 practical time limit?

    hello, could anyone tell me if there is a time limit between passing the written exam for the 2391 and passing the practical because i passed the written in april 2006 but failed the live tests on the practical but now i am doing the 2330 (i know it's all back to front!) and when i am doing the...

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