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  1. Rockingit

    Lead times for new OpenReach connections in London?

    Anyone have any recent experience on how long it takes from first phone call to actual installation for new phone connections to new build complex's in central London? Trying to give a ballpark to a client.
  2. D

    0.4 seconds or 5 seconds

    Just a quick question. This might sound like a stupid question so apologises. I'm slightly confused with the regs 18th edition when it comes to disconnection times. So I was taught in college that in the 17th edition that when a circuit is less than 32A then the maximum permitted time is 0.4...
    • David345
    • Thread
    • 18th disconnection disconnection times regs seconds times tripping times
    • Replies: 21
    • Forum: UK Electrical Forum
  3. B

    Disconnection times not met

    Three questions haha 1. 160A MCCB the max Zs for this particular switch is 0.25 ohms all tested and I’m getting 0.44 ohms its a 95 SWA outgoing which feeds another panel which has its own outgoing circuits would I be right and say that would be a code 2? As I can’t meet disconnection time on it...
  4. Mark Wright

    Disconnection Times Again! Fig 3A4

    Looking at Fig 3A4 Type B 60898 unless I'm getting it wrong once we In*5 our device there is no way of telling if our disconnection is 10s or 0.1s unless im missing something although this seems quite important??? as our Disconnection time needs to be at least 0.4 seconds and for doing our...
  5. Gavin John Hyde

    Advertising and cutting back in these times

    This isn't about the pros and cons of the various job lead and advertising sites. Had an email from checkatrade saying that during April and probably future months you can either pay a reduced 50% monthly fee or become associated member which means you won't appear in general search results but...
  6. gazdkw82

    Tough times. A little help

    If anyone is local to Leicestershire and is struggling to buy eggs, feel free to message me. I have ducks and hens and will gladly help anyone who is struggling.
  7. Pete999

    How times and practices have changed

    During the later days of my apprenticeship and early days as an Electrician, I was sent to report to the Electrical Foreman on the site of the now Hilton Hotel in Bath, my task "Bond all the Bathrooms on the site H to C to Bath with no testing in those days, got quite fast at it towards the end...
  8. D

    18th edition RCD max disconnection times!!

    Hi all. I am seeing different figures here all over the net, table3a (p363) states a 30ma RCD has a trip time of 300ms max. So at 5x is the maximum 60ms? I seem to recall 200ms and 40ms for a 30ma and these are the figures I am seeing over the net... Please I just want the correct figures for...
  9. C

    HORSTMANN VMK 7D SRS economy 7 times

    I really hope that someone can help! I've watched some YouTube videos and searched online but nothing really helps. We have a Hortsmann VMK 7D SRS, in a rented property. What I need to know is: * What time is the cheaper rate (economy 7) set for * Do we get an extra cheap rate boost between...
  10. S

    Mitsubishi colt

    Hi, my daughter has a mitsubishi colt 1.1 litre 56 plate. Her car beeps 3 times and then changes the radio station. This has baffled me. Does anybody have any ideas please. Thank you.
  11. C

    Maximum Disconnection Times

    What is the reasoning behind having a 0.8 disconnection time for up to 120 volts Uo, but it then jumps to 0.4 seconds as soon as you go over it? Wouldn't it be better 0.8 seconds for 150 volts Uo and under, 0.4 seconds 150 volts and over Uo?
  12. D

    How times have changed...

    Back when I started out a simple board swap to a nice new plastic 16th Ed split board would set you back £400 all in including labour , maybe even a bit less. I have just seen a quote from a well know utility provider for a consumer unit change for £1656.82 WOW
  13. G

    Disconnection times, some clarification

    Evening, just revising for 18th update course and wondered if someone can just clarify something. (I might just be confusing myself, too long staring at the BBB) Reg 411.3.2.2 ii) does that also include luminaries? I understand 411.3.4 applies. Do notes 1 & 2 of 411.4.4 mean that the use of an...
  14. Pretty Mouth

    Short circuit disconnection times

    Could someone shed some light on the following please? 411.3.2.1 implies that the 5s / 0.4s disconnection times only apply to earth faults. I've not found anything else in the regs that suggests they apply to short circuits. 435.5.2 says faults should be disconnected before the fault current...
  15. S

    RCD disconnection times on 2018 forms

    Evening all, happy Friday! On the new forms there is only one column for RCD disconnection times. I understood you would just record the highest of the 5x readings but on looking around to confirm I found this article on Professional-Electrician: "The model forms in Appendix 6 have been...
    • S P
    • Thread
    • disconnection disconnection times forms rcd times
    • Replies: 11
    • Forum: UK Electrical Forum
  16. C

    Max disconection times

    Having a debate on site as to disconection times on a TN system, does the 18 addition say 0.4 up to 32amp and 5 after and 5 for distribution circuits?
  17. M

    air bag light comes on at strange times

    My niece has a 2004 Mazda Tribute with a strange air bag light problem. She can make a 40 mile round trip without the light coming on if there are no high load devices on, but if she turns on the heater or lights the air bag light comes on a few seconds later. To me this means the problem is due...
  18. J

    Changes to the requirements on recording RCD disconnection times

    Hi everyone, long term visitor to the forum but first time posting a question... be gentle This question is with regards to the changes to the 18th edition certificates, which only require one disconnection time recorded. When recording the highest value taken when carry out RCD tests, Reg...
  19. Blehstor

    Tachometer reading four times as normal

    Hello everyone. I installed a new instruments panel with a tachometer for my old car (Fiat Uno) the board is for a Fiat Palio but the connections are the same and the panel fits perfectly. The only problem is the tachometer, it displays 4000 rpm when the car is turned on but idle, and goes all...
  20. gazdkw82

    Ax disconnection times 32A+

    I don't know why I've not noticed before but the disconnection time for final circuits greater than 32A is 5 secs on a TN earthing arrangement. Does that mean a shower has a disconnection time of 5 secs? Although this circuit would also fall under protection of an RCD?? Also, cooker circuits...
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