times

  1. 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...
  2. 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...
  3. B

    Maximum disconnection times

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

    RCD tripping times exam question

    I sat the 2394 written exam tonight and one of the questions was about testing a 30mA RCD. It asked which tests you would carry out and the permitted tripping times. I answered that at 30mA and 150mA it was equal to or less than 300ms and 40ms respectively. Which I believe to be within those...
    • Dave the spark
    • Thread
    • don't exam question rcd rcd tripping tests times tripping tripping times within
    • Replies: 11
    • Forum: UK Electrical Forum
  5. polo1

    MEM 63A, 30mA revs, A63HE

    Hi all, I'm looking for the above. Not keen on fleabay, can anyone assist? RCD obviously & sorry for the two pics!
  6. F

    Failed indicator stalk

    Good morning, everybody. I have just registered on these forums in order that I might seek some advice re a car electrics issue. I am not an electrician so I have not bothered introducing myself on the welcome page. Hopefully this is acceptable. I am trying to help an elderly friend get his...
  7. A

    Becoming self employed - is it really that easy?

    Morning all. Woke up and realised I've just about had enough of being cards in. I'm working for a great company and I get payed a decent wage but I can't stop thinking how easy it looks going it alone. I get quite a few emails and phone calls from recruitment agencies asking me to do contract...
    • ant_daley
    • Thread
    • becoming being employed going really self self employed times working
    • Replies: 9
    • Forum: UK Electrical Forum
  8. S

    joined at last meaning to do so for years

    my name is Steve I am a maintenance manager at a plastic injection moulding company and have been doing the job for 25 years I started as a young apprentice technician in the late 70s and followed that with a 10 year spell in the REME now I deal mostly with service and inspection of plant...
  9. Pete999

    Connections 60 years

    According to the NICEIC who posted an advertisement in 1966, they make a point to householders that it take 5 years to train as an Electrician, the same as it does to train as a Doctor. The organisation also introduces measures to ensure that rural district councils are aware of the benefits of...
  10. L

    Cable bending radius

    Hi, Is anyone got a table that shows minimum bending radius for cable. I wanted for HV armoured cable bending radius calculation? Regards, Laxmi
  11. Y

    Switching a fan...

    Afternoon chaps, Currently workingOn the design for a reasonably up market hotel. The clienthas decided upon having baths in the bedroom, Partitioned off by a half heightwall (It’s all the rage, apparently). We require vent for above the bath and Iwas trying to figure the best way to switch it...
  12. Mark42

    One three-phase breaker, supplying multiple single-phase loads. OK or not?

    I’m fitting a single-phase car lift in my own workshop. New three phase sub-main panel 10m from the lift, 16A TP MCB (with TP 30mA RCD upstream) feeding car lift control panel the in middle of the concrete floor, via existing underground (non-ducted) 4c SWA. Is it OK to mount the following on...
  13. A

    does this RCD need replacing

    hi everyone a second opinion would be appreciated was called to a house in February as RCD was intermittently tripping. some times 3 times a day sometimes none. during my initial look i discovered when the oven was ran for more then 5 minutes the RCD tripped. my inspection then found a...
    • Andystraughan
    • Thread
    • clear rcd replacing times tripped
    • Replies: 16
    • Forum: UK Electrical Forum
  14. telectrix

    Easiest Fault Ever!

    got a call this a.m. @ 08.10. "can you come out, no electrics at all in the house". "OK, 30 mins, what's the address?" 30 ish year old installation wylex metalclad with an added upfront RCD (tripped and won't reset). tripped as soon a rfc1 MCB was energised. while i got the lid off...
  15. G

    How Do You Fit Additional Immobilising Relay to Car with Start/Stop Fuel Saving?

    Hi, Is it possible to fit an extra immobilising relay* to amodern car loom with start-stop fuel saving? (in addition to the manufacturers standard immobilisingsystem) This is the logic that I’d like = Initial turn of key = only start engine if fitted securitysystem is happy to start AND...
    • geraintv
    • Thread
    • additional calibri car fit relay roman saving times
    • Replies: 9
    • Forum: Auto Electrician Forum
  16. gazdkw82

    Sources of guidance/reference books

    Hi all, I’m having a little trouble understanding whichbooks/reference guides/onsite guides etc to refer to when I’m looking forinformation. Is there a general rule of thumb for which sources ofmaterial will provide what information? Obviously some are self-explanatory (wiring regs...
  17. S

    France - Advise wanted with CU and MCB's for a barn rewire

    Bought a holiday home in France and the barn has very oldwiring eg. Brown Bakelite light switches with 2 pin holes for a power plug inthem. Cabling is old and rotted, fuses are white porcelain with some chickenwire inside as a fuse. Terrible!! So I am doing a rewire. All easy access toEDF meter...
    • sorton
    • Thread
    • advise calibri france mcb's not uk rewire roman times wanted
    • Replies: 6
    • Forum: UK Electrical Forum
  18. gazdkw82

    Earth fault loop impedance

    Iv been given the scenario: 6 circuit earth fault loop impedance values were recorded. Each circuit has type B cb. referring to the maximum values, show by calculation if these values are acceptable. so I can't do zs =ze+R1/R2 because they've not provided me with ze. doing some research it...
  19. M

    Galaxy 16 plus burglar alarm stuck in walk test mode?

    Hello Any thoughts appreciated on my problem with my Galaxy 16 plus burglar alarm. I recently powered it down, mains and battery, to do some decorating, as part of which I unscrewed 2 pirs, the control panel and the internal alarm box (not sure if this is the right term) to paint behind them...
  20. W

    Disconnection times

    Hello I understand why you need to find out the pfc to ensure breaking capacity is adequate. But I'm struggling to understand minimum fault current. Tncs e.g 230/0.35 =657 amps I think it's if the system has enough fault current to trip the breakers in time e.g a ring would be 3-5 times 32...
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