curve

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  1. A

    Fridge & Freezer Radial - B or C curve on RCBO?

    Hello, Please help settle a mental ponderance. What is the collective opinion on curve ratings on a 20A RCBO feeding two Radial feeds in 2.5 T&E, one going to a dedicated under counter socket (via DP isolator above counter) for a Freezer and the other doing the same but for a full height...
  2. G

    RCBO curve

    I’m probably going to look stupid here, but it will be worth it if I get the answer 😆, as I can’t fathom it out. I’ve never really thought of it before, but….. A circuit breaker comes in curves B, C, and D. Now we all know it’s mostly to do with the in rush of current ( layman terms) but the...
  3. Jasack

    Acorn 180 curve batteries

    I have the above chair lift. It only moves a few inches before cutting out. Then must be hand wound back to charging port. Once there it's only a minute or so till the lift shows full charged. I have switched off the mains the charging port. It's only a matter of minutes till alarm stop's and...
  4. G

    How does a D curve breaker work

    Hi all I have a bench saw which is tripping a 100amp breaker on a workshop spread. The question i have is how does a D curve breaker work? I know it has a longer trip time to deal with the start up of a motor. On this occasion a single phase saw with 14amp running load. Does the breaker stop...
  5. A

    Course question help B/H curve

    Q - Using the above graph, comment on how the material affects the B-H relationship for cast iron and mild steel I have no idea what is required here its online course and do not get help. Do they want me to describe what is happening for example Cast iron , flux density B increases quite...
  6. spud1

    1mm cable on a C curve 6amp mcb ?

    So I was chatting with a friend tonight (also an electrician) and we were talking about disconnection times of C curve MCBs (as you do) and he was convinced he had a distant memory that 1mm t&e cable couldn't effectively be protected by a C curve 6amp mcb but couldn't give me a good reason. I've...
  7. J

    Selecting which breaker trips first by trip curve

    Hello i'm in the EU and i will be getting 230v 40A service in my holiday house (previously was 3ph) My issue is that the mains come in at the pole just outside the property and i'm required to have a 40A breaker there (so far so good) The wire then comes to my house which is about 70 yards away...
  8. Spark40

    Schneider Electric Acti 9 iC60L MCB Mini Circuit Breaker 4P, 40 A, 10 kA, Curve C

    i have being using my multometer 4023 model on my mcb and its reading 309.3A but to my calculations it should be below 4 amperos can anyone lend me a 320A fuse would be delightful
  9. M

    nothing like being thrown a curve ball

    I was asked to change a light fitting in a neighbours house easy job help out a neighbour I thought. I had my 2nd oldest son with me so thought it would be good to show him how to work safely ie how to use a voltage indicator and work safe. normal procedure prove indicator using proving unit...
  10. DrewGil

    Advice on getting ahead of the curve

    hey guys, As a new trainee just started my course, I was wondering if there is anything that I should be doing or learning to help me get the best out of this course, other than when I just get to that section in a book. any advice would be welcome.
  11. SibertSolar

    IV curve tracing

    Just curious - anyone interested in being able to use IV curve traces when commissioning, testing etc? Very useful from a post-install troubleshooting or O&M point of view. Sent from my iPhone using Tapatalk
  12. a-z electrics

    Curve (Denmans) RCDs

    Anyone had problems with these rcds? Control Gear Direct, 30mA, 63A 2 pole.. I recently bought two 10-way dual rcd boards from denmans.. first one had an rcd which didnt trip on test button, even with load removed. Second rcd didnt trip under 300mS, but button worked. Swapped them for the...
  13. I

    Curve Dual RCD Boards

    Good evening, has anyone fitted these recently?? If so have you experienced any high Zs reading. We have fitted 2 recently and on 2 ring circuits our Zs reading were above accepted tolerances. We done al the checks and could not find e problem when we tested the RCD it was high on 2 different...
  14. G

    B2 Tripping curve?

    Hi Guys, I cannot see B2 in the tripping curves for 60898 in the BGB, any of you guys know the answer before I ask the manufacturer. Thanks in advance Gary
  15. K

    D curve breaker

    I have been asked by a customer to solve a problem, he has a 3 phase 20A D curve breaker supplying 3 single phase breakers 2 x 6A and 1 x 2A. The 6A breakers are supplying 2 pumps with a load of about 4A each. When 1 of the pumps are turned on, the 20A trips. Any ideas why? The earth loop...
    • kzzam
    • Thread
    • breaker breakers cable curve problem pumps table
    • Replies: 13
    • Forum: UK Electrical Forum
  16. robd

    Curve (Denmans) consumer unit...any good?

    Hi All, Just quoting on board change for customer, looking at doing 13 way board, main switch, 10 RCBOs and 1 MCB, got prices through on Crabtree (my usual preference), Proteus (I always usually avoid!) and Curve which is a Denman's own make I believe. Cost is significantly less on Curve...
  17. C

    curve cu

    as anybody ever used the curve cu's from denmans, never heard of them before and from what i can gather they use a mcb made by basics never heard of them either lol, had them on the phone to me trying to sell them £51 + vat for a 10way fully loaded with whatever mcb's i want dual rcd, been using...
  18. S

    Denmans Curve - RCBOs

    Hi ALL Going to fit a denmans curve CU over the weekend. What RCBOs do they supply for them? i'm guessing steeple? If so what are the quality like of the Steeple RCBO or curve RCBO? Thanks
    • SKY
    • Thread
    • curve electricians' talk rcbo rcbos
    • Replies: 1
    • Forum: UK Electrical Forum
  19. brs73

    WYLEX C Curve plug in mcbs??????????????????????????????

    do they exist i'll be a happy chappy if they do. ???????
    • brs73
    • Thread
    • aus curve electricians' talk mcbs plug wylex
    • Replies: 10
    • Forum: Australia
  20. G

    'C' curve MCB

    A recurring problem I've found with halogen mains voltage down-lighters is that if 1 bulb blows it tends to take the whole circuit down and trip the MCB. There must be a millisecond of overcurrent sensed when the bulb decides to go 'belly up' trips the circuit. Would I be right in thinking that...
    • glen.mason
    • Thread
    • aus curve electricians' talk mcb
    • Replies: 2
    • Forum: Australia
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