overload

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  1. S

    injection testing of crompton thermal overload

    Evening All, Is there anyone that knows what tests are required when carrying out injection tests on a Crompton Thermal motor overload type CR 12 /13 model. Thanks Sparky 63
  2. F

    will x2 2400w plinth heaters overload my ring circuit?

    Hi I'm due to get my kitchen replaced and will be installing x2 2400w plinth heaters so will I require a seperate circuit or can I connect them to my ring circuit ?
    • FaLcO_1_
    • Thread
    • circuit heaters heating kitchen overload ring ring circuit
    • Replies: 4
    • Forum: DIY Electrical Advice
  3. M

    am2 motor overload

    Hi has anyone recently done the am2? I just wanted a basic calculation for setting the overload (they give you motor rating in Kw) for the 3 phase dol motor. I have tried looking this up for last few nights, but keep getting inconsistent or over complicated findings. and people at work say...
  4. M

    More overload fusebox!!

    Holiday let sleeping 8+. Gas ch (combi) and cooking. 2 x Wylex rewireable cu's, pme (6mm earthing conductor!), no rcd protection. 16mm dno supply, prob 100A dno fuse, no rating on meter but likely to be 80A 1 x cu for normal (lights, rfc's) etc. 2nd cu 60A rating with 3 x 45A fuses feeding 3 x...
  5. T

    Overload fusebox

    Wylex bs5486 4 way 60 amp max?
    • tooleystreet
    • Thread
    • attach fuse fusebox hours overload question
    • Replies: 64
    • Forum: UK Electrical Forum
  6. A

    Motor overload issues

    I have an issue with a three phase submersible pump. The pump is controlled via a 55v control panel. The panel consists of the mains isolator, the 240 - 55v transformer for the control circuit, relay, contactor and overload. The pump works off three floats, one start one stop and one high level...
  7. F

    dasy chaining boards ?

    a big hotel group has asked us that they want 2 way dbs in each bedroom feeding one socket and 5 lights all led fittings, but they want the supplies to boards daisy chained from 10mm t&e or swa feeding 4 rooms per circuit. the only way ive ever done this is sub per board, but cant find anything...
    • falcon0310
    • Thread
    • boards feeding hotel overload rooms
    • Replies: 85
    • Forum: UK Electrical Forum
  8. J

    KVa and ka and overload.

    Hi, I'm an apprentice electrican. Please could someone give me some guidance on this as I am confused? Thanks. What is the difference between overload rating ie 6amp on a circuit breaker and breaking capacity on a circuit breaker ie 10ka? I'm confused. Thanks :)
  9. O

    D.O.L With Timer Circuit

    Hi. I am new to D.O.L but have sussed them out except I have one scenario I still need help with. There is a single phase pool pump which is set to come on with a honeywell single channel 7 day time clock. I have wired the D.O.L as single phase with a 230V coil. The problem is I need the...
    • owenskinner
    • Thread
    • button circuit clock contacts overload still timer
    • Replies: 23
    • Forum: UK Electrical Forum
  10. M

    Choosing MCB for cable overload protection

    Hello. I need advice about choosing MCB for cable overload protection. I'm using BS7671:2008 Requirements for Electrical Installations. Reg 433.1.1 has 3 requirements: 1. Ib <= In 2. In <= Iz 3. 1.45Iz >= I2 I don't understand reason of 1.45Iz >= I2. And I think this requirements are...
  11. I

    protecting cable inside a distribution panel.

    Hi, Just came across something earlier that made the have a think. Distribution panel fed by 25mm cable. This goes directly in to a D50 breaker. The D50 feeds 4 6mm cables squeezed in top of the MCB that feeds small 3 phase bus bars, these in turn feed 1.5mm circuits. I have fitted MCBs to...
  12. A

    3 phase contactor with overload

    Hi all, Could some one explain the correct way in connecting a 3phase contactor with overload protection. I have the supply going into l1, l2, l3 and motor connected to the load terminals, t1, t2, t3. I also have the 230v connected to the a1 coil and neutral on a2. Just a bit confused...
    • Akanami
    • Thread
    • 3 phase contactor current motor motors overload phase
    • Replies: 19
    • Forum: UK Electrical Forum
  13. F

    nominal current rating of main switch

    hi guys if installing a shower consumer unit with a 63amp rcd main switch and a 100 amp OPD PRIMARY SUPPLY then main switch is of a lesser value than the main over current protective device how do we get around this.
    • foghorn
    • Thread
    • circuit current main main switch nominal overload rating rcd's shower switch
    • Replies: 4
    • Forum: UK Electrical Forum
  14. T

    Overload?

    Right following on from my last post. i rewired a pizza oven circuit as the oven was being moved.its done in 16mm twin and earth.protected by a 50 a mcb. guynfoned tonight saying after half an hour the circuit tripped so went up the oven is 13 kw can this be an overload?should I put a 63a mcb...
  15. D

    Rcd- mcb

    Hi guys in installing a 16mm submain with a 10mm earth and I'm going to install a 80amp time delay RCD with a 63amp MCB to protect it. Some one said I could just use a 63amp RCD to protect it? Never done this before and wouldn't think you could. Also should I just use a 63amp RCD with a 63amp MCB
    • davidcaulfield
    • Thread
    • enough mcb overload protection rcd
    • Replies: 62
    • Forum: UK Electrical Forum
  16. A

    Dual Wall Socket Overload?

    Hello, I am an IT Tech and not an Electrician so please excuse my ignorance... I have three monitors, one 860W computer and multiple other devices including printers etc.. plugged into 2 x 7 UK Power Socket Extension Cords which can be found by googling the following: Belkin Conserve Smart AV...
    • AaronHatton
    • Thread
    • computer equipment overload plugged power socket sockets wall
    • Replies: 10
    • Forum: UK Electrical Forum
  17. N

    overload

    Hi Guys I hve a ring main that keeps tripping, but it also trips the main rcd on the board, is there a possibility that it is being overloaded? There are about 6 computers a franking machine a photocopier coffee machine and a few other gadgets on this one ring of 10 sockets! Should the ring be...
  18. Darkwood

    Omission of overload protection for fixed loads.

    Been reading various threads with regards to having an mcb that exceeds the cable rating thus only providing short circuit protection, what surprises me is the negative responses that are posted if it is ever suggested. Now lets try put a translation on the regulation specifically 433-3-1 (ii)...
  19. B

    contactor / overload

    I'm probably going to get shot for this question, but when wiring a contactor/ overload does it matter wich side the supply is connected? I.E into the overload first or into the contactor and out through the overload?
  20. O

    Dimmer overload

    I'm part qualified so you'll have to forgive my tiny brain... 12 x 50w Gu10s that have munched a couple of dimmers.(a silly load for a room that's abut 8 Msq) I understand that with these halogens I may have to de rate the dimmer which would mean a 1200 watt dimmer (a bit pricy by the looks...
    • Only1harden
    • Thread
    • dimmer halogens overload rating switch
    • Replies: 10
    • Forum: UK Electrical Forum

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