times | Page 3

times

Recent contents View information Top users
  1. R

    Disconnection times for finals

    Just received a completed test sheet from an installer on a TN system with the max permitted disconnection time column filled in for the lighting circuit and 20A heater circuit as 5secs, surely 0.4
  2. P

    Disconnection times help

    Hi all just a little bit of advice at the company i work has just had a condition report done and they have marked down excessive zs for a 63a type d breaker but they have put it at 0.4 disconnection time it is a permanent fixed compressor I thought this would have been 5 sec it also has a b.s...
  3. John Lundrigan

    I'm confused about Type C Breaker Disconnection Times

    Hi All, When I consult Table 41.3 for a Type C Breaker rated 16A I see s max Zs of 1.37 Ohms. However this value is defined for both a 0.4s AND 5s disconnection time. This is obviously correct so I am missing something. Fig 3A5 also shows the table 0.1s to 5s. Can anyone explain please...
  4. W

    No bonding!! How many times?

    Just wondering what other sparkys experiences are on this. Whether I am carrying out an EICR , or installing a new circuit in a premise ( usually domestic) I would estimate that main and supplementary bonding is not in place around 20% of the time . Whether that is its never been in place or...
  5. haptism

    RCD testing times BYB vs OSG

    Happy new year folks; just been looking at trip times as i need a photocopy for a client. Anyhow, in the OSG (page 112) for a general RCD, it states "with a leakage current of 100% the device should open in less than 200ms". However in the BYB (Table 3A, page 318) the table says device should...
  6. DomB78

    TYPE C RCBO Fails to trip on 1 Times RCD Test

    Hi Can anyone help ? Recently fitted 2 separate Eaton 32a Type C RCBO, on the RCD test it fails to trip on the 1 times test and gives result as >400ms. It trips fine on 5 times test in 7.1ms. Using Megger 1552. They are fitted on 2 new 6m2 radial circuits with Blue commando sockets. IR results...
  7. M

    3 rcbos tripping at different times

    My mates asked me to go and help find some faults at a house. Rcd tripping so he put 3 socket rings on 3 separate rcbos. Now he says they are all tripping at different times. . Says he's tested ir and it's about 6 meg on one ring. If they are separate why would they trip. . Good Ze in board ...
  8. Dave Jenkins

    Why are the RCD trip times for I and 5I 300ms and 40ms

    Is there any particular reason why the trip times for RCDs at I and 5I are the values they are (300ms and 40ms). Is there some particular medical reason why?? I'm just curious, no particular reason but may weave that into the conversation next time I'm in the pub!!
  9. T

    Just had to post this! Western power replace main fuse twice and it popped both times

    Called to inspect power completely off. As title suggests main fuse had popped and DNO said call an electrician. You will not believe this job! The boxes are rotting away. The cables full of verdigree and corrosion. Soaking wet. All at a chinese take away. The cellar has no light. The only way...
  10. Pete999

    Pete's Videos How many times have you been on site and watched a builder try and fit a plug top

  11. C

    AC fan stays on at all times?

    Hello, I have a 1988 Toyota Celica Alltrac (4WD Turbo) and ever since I've owned the car, the front secondary fan (mounted on the front of the radiator and blows into the engine bay) stays on all the time at low speed when the key is turned to the start position (engine off and engine on). Also...
  12. Pete999

    Workwear how times have changed, what do you wear to work?

    Just harping back to when I started, herringbone jacket, flannel shirt with matching tie, bib and brace overalls an polished shoes, bits of bog paper stuck to your face where you cut yourself shaving in cold water, catch the bus, get to the office to find out what your next job was, none of this...
  13. G

    Newbie from South Africa

    Hello everyone. Just a heads up, English is not my native language. I rely heavily on the the spellchecker to help me correct my words. So some of the words may not have the meaning that I intended. I am from South Africa, a white male, 44 years old and one of an identical twin (we shared one...
  14. Lou

    Marks Electrical Services

    Marks Electrical Services offer a complete service in both domestic and commercial sectors in Cambridge and the surrounding areas. Run by Dean Marks, a Cambridge man with 20 years of experience, Marks Electrical Services will undertake to provide quality workmanship that you can trust. We pride...
  15. codger

    RCD operating times

    Hello. Just a quick query please lads. Operating times for RCDs, (non-delay) on 100% of rated residual tripping current. Is the maximum operating time 300 or 200ms? Guidance Note 3 states 300ms, but various other publications say 200ms. I was under the impression it was 200ms. Just trying to...
  16. telectrix

    puppy times.

    just to lighten the atmosphere before i go to my pit, here's an employer we'd all like to work gor. Brewdog gives staff a week off when they get a puppy | Daily Mail Online - http://www.dailymail.co.uk/news/article-4232802/Beer-company-gives-staff-week-puppy.html
  17. Pete999

    Pete's Videos How many times do you need telling? volt sticks are OK

  18. Edtwozeronine

    Homework help

    I'm looking for the section in my on-site guide that covers disconnect times for circuits over 32a. In my regs class my homework features a circuit with a type B 45a RCD. EDIT: oops never mind I now see it says anything exceeding 32a must not be more than 1 second. I thought there was a more...
  19. polo1

    Exceeding max adjusted Zs on a board change.

    Testing during a board change, a RFC on a 32A 60898, with rcd protection, you find that the max Zs is exceeded by 0.1 ohms using the no trip setting on your mf tester On the EIC do you - A) simply record the actual measured value B) record the actual measured value and note the position under...
  20. B

    Maximum disconnection times

    Hi does anyone know max disconnection times on tn-s system for: 16A radial 6A lights 32A distribution Cheers

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

YOUR Unread Posts

This website was designed, optimised and is hosted by untold.media Operating under the name Untold Media since 2001.
Back
Top