1. C

    16A device on a 15A breaker, do I need to replace the breaker?

    I'm going to have to replace my faulty EVSE car charger with a new one. The Clipper Creek one is pretty pricey, so I'm looking at a much less expensive Zencar. The concern is that it says it requires 16A. My garage has a single 15A breaker for it that's in the house, but I don't know the size...
  2. R

    Ordered new breaker and want to make sure it matches the current breaker in the breaker box that needs replacing.

    I ordered the exact breaker that is in the breaker box and they sent me this one. I want to verify that it is compatible with one in the breaker box. I took a picture of each. Thanks in advanced the company won't answer their phone so I'm kind of stuck until I find out!
  3. S

    something wrong with breaker box

    I've lived in this house for the past 8 years, never had a problem. until a few months ago the lights in the living room, oven, fridge and central air all started to stop working sporadically. checked the breakers and they don't get thrown. noticed that the light is actually getting enough power...
  4. M

    Secondary Transformer Circuit Breaker

    Hi, I'm just curious about what will happen if I use an MCB lower than the calculated current rating. I have a 1kVA 220v stepdown to 110V transformer, calculated downstream MCB current rating would be 11.3625 if i'm right I multiplied the secondary current to 125%? what will happen if I use a...
  5. M

    Do I need over current protection?

    Hi guys, i'm working on some project, do i still need over current protection if i'm using a soft starter and do I still need circuit breaker for that motor???
  6. B

    Domestic Water on electronics, no breaker drops

    Hi everyone, I rented out an outdoor space for a party and they brought a DJ. Unfortunately there was a water pipe that burst and showered the entire party as well as the DJ stand (just my luck). The DJ is now telling me that all of his equipment is fried, laptops, TV, disk players...
  7. P

    Domestic 3p breaker feeding 3 x 1p circuits

    Hi everyone. I may be blind but I can't find a definitive answer. Can I use a 3 pole breaker (originally feeding a massive 3 phase heater) to feed 3 single phase circuits? I've run seperate neutrals for the 3 new circuits and the breaker is rated for the load required - 30a per phase (I'd...
  8. P

    Domestic 45A breaker max Zs values

    Hi all, Why is there no max Zs value for a 45A type B breaker in table 41.3 of 18th edition? What value should be used as max value on schedule of test results? Cheers.
  9. J

    Circuit Breaker needed for Split Air-con with Inverter

    Hello all. I´m installing a new multi split Air Conditioning (Inverter Type) in my dwelling and I have to purchase all of the electrical parts needed for the installer. I am currently running a 63a Type-A RCCB and I was told by the electrician that I could use the Type-A with a 16a Type-C MCB...
  10. F

    Domestic Fuse box makes humming sound when off-peak water heating

    Video of issue: Hi I’ve noticed a humming from my fuse box when my nightly off-peak water comes on. When I first moved in I had a similar issue, albeit louder / more high pitched. An electrician replaced the contactor at the time. It might be worth noting that that little grey box (I think...
  11. willsie01

    Built in oven (grill) tripping breaker

    Our built in oven works fault free with all functions except for the grill which trips a breaker when switched off. Not while being used but when being switched off. There does not appear to be any visible breakdown of the element. Is it worthwhile pulling the unit out and swapping out the...
  12. T

    Spur off a power breaker

    Hi all. I currently have a double socket with 3x wires in the back. One set is going to a single power breaker ( which then goes through the wall). Not sure what it does or protects as it came with the house. I wanted to spur off to a single socket behind the tv. Would I be better changing...
  13. G

    Breaker trip after screwing light fitting back to freshly painted ceiling

    Hi, This afternoon, finished re-emulsioning a plasterboard ceiling in a 25-y-o house (so the electrics are modern enough). I had removed a circular metal light fitting - the swivel 3-spotlight type of thing - but it uses modern LED bulbs. Never ever had a problem with it. The wiring is solidly...
  14. S

    Washing machine trip the breaker.

    When my washing machine (7 year old ) was running yesterday it trip the breaker ( that one ,first on the left , RCD i guess?!) and no power in home. We reset the trip and the same happened twice more (took me a ittle while to realise it was the washing machine!). The socket is OK, and I presume...
  15. J

    Living Room MCB breaker tripping

    Hi, The breaker for my living room has been tripping since Sunday. I have physically checked all the wiring in the sockets and they all seemed fine. I then checked them all with a socket tester and the read was fine. I have used all of the appliances on a different circuit and they are all...
  16. C

    Industrial Breaker Coordination

    The trip ratings of upstream and downstream circuit breakers should be same as I was told by a senior. Why cant the downstream circuit breaker be rated less than the upstream breakers. I'm not talking about the short circuit ratings, but the Ampere trip rating.
  17. Spark40

    Domestic 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
  18. Z

    Eaton BR4040L convertible to Main Breaker?

    Hi All, I have a BR404L box and it looks like I can convert it to a Main breaker by changing the cover and adding a 200AMP main breaker where the Lugs are. Is this possible and or recommended? From what I can see you would need to swap the two main leads, is that correct? Thanks in advance
  19. Empire

    Crabtree f-60 tp&n circuit breaker bs# and short circuit capacity

    Morning All, Having spent many years gleaning information from you all as a non member I've finally needed to join because, try as I might, I just can't find the answer to this puzzle, so here goes. I've just installed, replaced really, a TP sub board that's being fed from a Crabtree 60A STD...
  20. M

    Is this the real bible eicr code breaker

    I have been told this is the bible for inspection and testing , would this be the opinion of guys in the field , it defo seems clear and easy to use and it does allow for standardised coding by all ( if everyone sings from the same page ) Any opinions on this book ? Has any 1 found any...
  21. G

    Circuit Breaker drops before Fuse

    I have underfloor heating rated at 3kW. The circuit goes through a fused switch with a 13A fuse in it. That is supplied directly from the main fuse box with a B16 circuit breaker dedicated to that circuit alone. Every time we use the system, it warms up for a bit, then the circuit breaker goes...
  22. J

    Circuit breaker for new belling oven incorrect. Should it be changed to 20Amps or 32Amps?

    Dear all, I recently bought a new under counter belling bi70fp oven. 4.5kw at 240v. I have a circuit breaker on the main switchboard for the oven at 40Amps. I was told this needs changing to a 20Amps. The specification on the oven stated 32Amps. I am confused to the advice. What is the...
  23. jimmy gunstone

    please help! wired a 2.5kw ac into a oven circuit and breaker. is this ok?

    I just installed a new hitachi 2.5 kw ac and wired it into an old cooker switch which goes to a breaker of 32amps. the unit Hitachi Summit RAK-25PEB 2.5kW Inverter Split Wall Mounted Air Conditioning System | discount portable air conditioning, fixed air conditioning, easy install...
  24. B

    Eaton Breaker Date Code

    I am trying to determine the date of manufacture of the subject breaker. Can anyone help me with that. I am not sure if the date code is shown. The face of the Eaton breaker has the following: Eaton Type BR260 Type C260 120/240 V - Cu/Al HACR Type 2 Pole J969 E7819 - T LR43556 Disj A guess...
  25. B

    Eaton Breaker Date Code

    I am trying to determine the date of manufacture of the subject breaker. Can anyone help me with that. I am not sure if the date code is shown. The face of the Eaton breaker has the following: Eaton Type BR260 Type C260 120/240 V - Cu/Al HACR Type 2 Pole J969 E7819 - T LR43556 Disj A guess...
  26. Y

    Need Help with Breaker Sizing 3 phase

    Good day to all. Please correct me if im wrong and also want your professional inputs. I am servicing a pump motor rated at 415vac 3 phase 11kw power. The breaker is at 20amperes. The complain is everytime the motor automatically stop when the tank is full the breaker always trip during the...
  27. 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...
  28. Malcolm

    Trying to locate a RTC Dual Breaker

    Hi all. Would anyone be able to tell me where I would be able to locate one of these. It is for a transformer and each mcb is for one double socket. As you can see the one on the left hand side is damaged. Thanks for any help. Malc
  29. martinwood333

    Domestic Breaker Tripping under unusual circumstance...

    Hi there all. First off would just like to introduce myself real quick. My name is Martin and I live in Airdrie, Scotland! My Wife and I have lived in our house for a little over 3 years. For the past year or so, I've been experiencing a rather odd issue (which has gotten progressively worse)...
  30. Nick Grant

    Grill Door Trips Breaker

    Hi, Bit of a strange one this, our oven of 8 years is causing the power to shut off when ever you open the grill door. Everything is fine with the Oven and the hobs. If the oven is still switched on at the wall (Red Switch) and the grill is turned off on the oven, it still trips the electric...
  31. U

    Flat communal stair lighting breaker box key

    Hi all, Does anyone know where I can find a key that would fit a lock like that shown in the attached image? This sort of 2 prong lock is on an electrical cabinet in our communal stair and houses the circuit breakers for the lights. I want to cut the relevant circuit so I can change the...
  32. G

    Breaker size for Double Oven.

    Your comments appreciated please: New Neff Double Oven - 28A total load. Oven tail 4mm 3c butyl HO7 35A rated. Feed 6mm T&E, to a 40A oven switch with 13A socket. Circuit breaker - 40A or 32A ? thanks, John.
  33. tank

    Multiple circuits in breaker approach

    Doing an eicr on a landlord board, in a small 1940s block of bedsits, found a type 2, 30amp socket ring breaker with 5 x 2.5mm cables in it. I assume that 2 of the wires came from an empty adjacent 30 amp heater ring breaker that had been damaged (screwdriver busbar metal board bang) and the 5th...
  34. O

    Does a fuse/circuit breaker blow easier when there is high load on the grid?

    Short version: When there is a high load on the power grid in general, does it make it more likely that my fuse will blow? Full version: I'm renting an apartment in Rome, where we are currently experiencing a heat wave. When running the air conditioning unit on max, the circuit breaker will...
  35. J

    Mitre saw tripping main breaker - Help!

    Hi all I've just signed up to the forum as I'm at a loss with what the problem is - I've asked the (sort of) electrical guy at work and he is also out of ideas. I myself have next to no electrical knowledge, so please bare with me.. My SIP 12" Mitre saw is being problematic. 2000 w, 13amp...
  36. S

    Maximum breaker size for DB (solar PV)

    Hi, Can anyone point me in the direction of the regulation / code for the max solar MCB size when connecting into a spare way of a local distribution board ? Eg. Is it possible to connect a 100A breaker into a 100A board ?
  37. Techgenius

    Earth likage circuit breaker

    Hi Guys!I have question,why is the E.L.C.B connected outside the resistance area of any parallel path to the earth? And also I would need the full wiring diagram of the E.L.C.B if anyone has an access to it.Thank you
  38. E

    EICR Main Switch/circuit breaker

    Morning guys, I'm just after a bit of advice. I carried out an EICR on a commercial premises yesterday (no periodic since 1995). 3 phase out of the meter into Henley blocks then split between 3 distribution boards. Two single phase (one old 7 way rewireable wylex board and one single way...
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