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main fuse

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  1. G

    Main fuse query

    Hi I’m planning on getting my house re-wired soon, the installation at the minute is an ancient old fuse board with all sorts going on in there! My main fuse is rated at 60 amp and my question is should I get the dno in to upgrade if needed to 80 or 100 amp! Am I best doing this before or after...
  2. R

    Main fuse keeps burning

    Hi we are currently located in Nairobi, Kenya and have UK 240V. We have a problem that the fuse in the main fuse box keeps burning. Each time we replace the fuse it lasts roughly a month. We have seen that the burning to the wire is on the inlet side of the fuse. The house doesn’t have many...
  3. M

    3 phase swa sub main fuse

    Hello All Just a quick one does a three phase 25mm sub main in swa 4 meters long have to be fused even thou it comes from a bs1361 100amp services fuse then from a standard three phase isolation switch fitted from electricity company? Being swa and 25mm in size would this be acceptable? Reason...
  4. J

    My main fuse box is right behind my front door

    Hi, I've just moved to a ground floor flat and my mains fuse box/circuit breaker box, which ever it's called, is right behind my front door at the top. I moved into the property as it is supposed to be adapted for disabled access as I have a medical condition but the wiring was done before I got...
  5. S

    Bypassing main fuse. Anyone else seen this?

    Evening all, I was doing an eicr in a flat today, it came to checking the main service fuse. Fuse pulled I proceeded to undo the case to check the amperage and was a little shocked with seeing a metal bar essentially bypassing the fuse(pics attached). After a little thought I guess there is...
  6. 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...
  7. G

    Eic main fuse question

    doing a EIC for new installation on a flat fed by a 16mm t/e. Main fuse (100A) feeds fuse switch (63A) to cu in flat. My question is; Ze taken from main fuse, Zdb taken from cu. but when filling in main switch, tails and earthing conductor, do I record what runs from main fuse to fuse switch...
  8. N

    Main Fuse is apparently ancient

    I've just moved into a 1920s house and want a new fuse box as I'm not happy to fiddle with fuse wire. An electrician looked at it and said "first you need to change the main fuse" and wandered off! So am I right in thinking an electrician cannot change this please?
  9. H

    Pulling the Main Fuse (Poll)

    So, anonymous poll - who pulls the main fuse when required (ie CU change) and who get's the DNO/supplier/whoever in to sort it?
  10. Z

    Main fuse blows when sub-box energised

    Old wylex system, main fuse box with ring & lighting and small 3-fuse sub box with shower, oven and secondary ring. All rewirable fuses. Main fuse blown when sub box powered, dno replaced bullet fuse that immediately blew again when sub box powered so dno replaced again and left sub box off...
  11. C

    Pub Main Fuse

    Hi all, just thought I would ask some of you experienced sparks out there some advice if I could! I recently got called to look at a pub which has a single phase supply with a fuse carrier with 300 amp written on it and it takes the type J style 415volts fuses. I have never come across a single...
  12. G

    main fuse blown

    was called out to house earlier where couple had returned from holiday to find they had no power. on closer inspection I discovered that the main 80amp fuse had blown, no mcbs or rcds had tripped. any ideas ?
  13. C

    Main Fuse query

    Hi, I've come across a system with no apparent main fuse. The supply comes into a metal hinged box with the words BIG Ltd on it. This is boxed inside a cupboard so I can't open it or tell if it is sealed. The tails then come out to the meter and into a double pole connector block. This...
  14. T

    BD consumer unit main fuse and right side of RCD and MCB's burning out

    God morning, I fitted a 6 waysplit BG consumer unit the other day and the right side, starting at the main 100 amp switch have burnt out, literally flames and melted the fuses!!!....it is a 3 bed house with the usual mains/lighting/10kw shower etc and they have a PV system. After the meltdown I...
  15. leep82

    changing size of main fuse

    Anybody have any idea what costs are involved if you were to ask your supplier to increase the size of main fuse? Been on a job today and the customer has said she would like a shower installed. The property currently has a 60a supply the tails wouldnt need upgrading as theyre 25mm. Im just...
  16. MerlinGremlin

    pulling the main fuse

    Evening Gents and Ladies hope all are well, just wondering if anyone can give me advice on where I could attend a training course to be qualified and authorised to remove cut out fuses. I did one many moons ago as an apprentice with the local council when I worked there, we went to Hoy Lake the...
  17. C

    Holiday Chalet Advice 30Amp 1361 Type Main fuse.

    Hi There, First post so be gentle. I've been asked to install a trip switch on a 2 bed holiday chalet, where each of the chalets is supplied from the holiday park's mains on a 30Amp 1361 main fuse cutout. However the owner of the chalet has already blown this fuse twice (at £50 a pop to...
  18. S

    Moving Main Fuse

    Hi guys I am on a job currently where a consumer unit has been extended and moved from one cupboard under the stairs to another cupboard under the stairs to make way for a new toilet. Now the lady is having the meter and supply moved as well by edf, apparently you cannot have the main fuse...
  19. D

    Question regarding instant water heater fuse and main fuse box question

    Good evening all, I have two questions for you, which I would very much appreciate input on :>) 1: I have a Stiebel Eltron DHC hydraulic instantaneous water heater in my toilet room, next to my bedroom. It has not worked since we moved in two weeks ago. It has a switch spur in close proximity...
  20. J

    BS 1361 main fuse short circuit capacity/overload at ka ratings explained.

    Hi. I am an apprentice electrician, and was wondering if anyone could help me as I'm getting confused with something that's probably quite simple. If I am correct to work out the amps running though an appliance you do w/voltage. So 10kw/240v = approx 42amps. Of I'm correct in this? My boss...

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