Search the forum,

fuses

In electronics and electrical engineering, a fuse is an electrical safety device that operates to provide overcurrent protection of an electrical circuit. Its essential component is a metal wire or strip that melts when too much current flows through it, thereby stopping or interrupting the current. It is a sacrificial device; once a fuse has operated it is an open circuit, and must be replaced or rewired, depending on its type.
Fuses have been used as essential safety devices from the early days of electrical engineering. Today there are thousands of different fuse designs which have specific current and voltage ratings, breaking capacity, and response times, depending on the application. The time and current operating characteristics of fuses are chosen to provide adequate protection without needless interruption. Wiring regulations usually define a maximum fuse current rating for particular circuits. Short circuits, overloading, mismatched loads, or device failure are the prime or some of the reasons for fuse operation. When a damaged live wire makes contact with a metal case that is connected to ground, a short circuit will form and the fuse will melt.
A fuse is an automatic means of removing power from a faulty system; often abbreviated to ADS (Automatic Disconnection of Supply). Circuit breakers can be used as an alternative to fuses, but have significantly different characteristics.

View More On Wikipedia.org
Recent contents Top users
  1. A

    Heating fuses blowing

    Hi all I have a problem with a fuse constantly blowing on the heating system. It’s only been in the last few days… the zone valves are working fine and opening as normal and it only happens after about 10 mins of running for hot water or heating. The pump is making a noise like there is air...
  2. O

    Polypipe system Zone thermostat blows all fuses!

    Good day everyone, I'm coming to this forum in the hope that the collective minds can help me. The story is long, depressing and complex so I'll try to condense the issues for you all, and hopefully you can steer me in the right direction. Thanks in advance for reading the below tale... We...
  3. Robert Tyrrell

    3.15amp fast blow fuses

    Does anyone know where I can get a few of these in a hurry? 3.15amp fast blow fuses I prefer the ceramic ones but glass will do if I can't get any ceramic. I used to get them from Maplins in town but they've disappeared and I need a couple for the van and one for Monday at least
  4. Scott_D

    fast blow fuses - universal?

    Are fast blow fuses usually universal? Called into an alpha where the 2amp fast blow fuse has gone. Plumbcentre dont stock them but they have regin
  5. jaydebruyne

    New heating controls and wiring

    I just need confirmation I'm doing this right as per my drawing.. Not sure if this is clear enough.. but... I've replaced an old mechanical timer and room stat and had to rewire as custard wanted them relocated. I was trying to do this without a wiring centre and it kept blowing the fuse...
  6. jaydebruyne

    Fuses

    Is an F2 fuse just a 2 amp glass quick blow fuse? And an F1 the same but 1 amp?
  7. M

    PCB fuses

    Where do you buy spare PCB fuses from? My local spares shop is stupidly expensive and I like to carry a few of each of the popular ones - 1.25A, 2.5A fast and slow-blow, 4A, etc. Looked in BES but they don't list them. Cheers!
  8. Riley

    Running out of fuses

    Hi all can anyone help with my Ariston query. Been called back to the same property 3 times now to look at an Ariston E-Combi 30 1st visit - changed fuse at switched spur - all good 2nd visit - changed fuse at switched spur and fast blow fuse on pcb - all good 3rd visit - changed fast blow...
  9. B

    Ferroli DOMIcompact F24B - Both fuses blowing on PCB ??

    Hi All Recently purchased a flat and i know the boiler has not been used for months as the place was unoccupied. It does power up for a few second then BOTH fuses blow on the PCB, the display shows '7' when the power is on. Could this be something simple like a stuck CH pump (Grundfoss) or...
  10. V

    PCB Fuses

    SimonG wrote: Still didn't say if you got sorted with the pcb fuses. Thanks Simon, I did get them from Plumb Center. Much as I opened up a trade account with them, I find their prices 'extortionate', so have decided to continue shopping with...
  11. S

    Was working, now it isnt lol

    Hi again everyone, back with my lovely boiler, engineer came out and gave the boiler a service, got it working all nicely, until today, was working fine this morning and then it cut out, turns out both 3.15A fast fuse and 5A plug top fuse had blow, the 3.15A was literally blown to bits lol, only...
  12. J

    Boiler spares

    Hey guys as the cold approaches and i have a few contracts with maintenance and servicing. i need to do a van stock for boilers fires etc, i know i cant carry it all but could you guys point me in the direction of what would be easy to carry, thermisters, diaphrams etc and for what boilers. I...
  13. J

    baxi duo tec pop fuses on the pcb

    just gotta a call and on my way to go look at this duo tec he that periodically pops fuses on the board. any thing i should be looking at with the multimeter. is there a common problem? thanks in advance for amy help
  14. V

    PCB Fuses

    Can anyone please kindly advice me where I can obtain PCB Fuses (2amp) from? My local Plumbase dont seem to stock them? thanks
  15. galaxy_plumbing

    Tribune Premier TP180e blowing fuses

    Hi guys, went to this water heater today. It started blowing fuses. I tested both elements for short circuit and found that top one had short circuit between live and neutral. I managed to get new element from merchant. After all the hassle when I try to remove old one I was happy to install...
  16. S

    imerssion timer dodgey electrics?

    Went to a job today, customer had no hot water. Fed from an imerssion heater. Found power to imerssion timer from switch on wall (not spur) nothing coming back out on sl to power imerssion heater. Diagnosed faulty imerssion timer. There was an old one lying on the floor and the woman said...
  17. O

    glass fuses a bit of general knowledge

    Hey guys. Been to see a glowworm ultimate tonight. The fan has jammed and as a result the glass fuse had blown. Went to a local independant merchant to see if he had any fuses in stock. Got a fuse ready to replace when I fit the fan tomorrow but the new fuse has a marking saying f1A240v but the...
  18. L

    fuses keep blowing

    hi we have an apollo 30/50 boiler which keeps blowing the 3 amp fuse it seems to happen when the room thermostat is turned i have replaced the thermostat but the problem has not gone away any ideas thanks
  19. K

    Heatline Vizo 24 fuses

    Hello Guys, I have had a recent problem with a Heatline Vizo 24 which developed a leak from the diverter valve and as a result started blowing the micro fuses on the PCB. I have had the leak fixed by uing a repair kit and have also replaced the actuator motor. The problem is the fuses on the PCB...
  20. J

    Britony Combi SE - Glass Fuse on the PCB keeps blowing!

    Hi All, I have a CHAFFOTEAUX ET MAURY Britony Combi SE boiler which is used for central heating only (shower is electric and hot water to taps is via ecomony7). It gets power via a normal wall socket by way of a 3am plug. I have checked this wall socket with a table lamp and all appears to be...
    • jackflash
    • Thread
    • blowing boiler britony combi fuse fuses glass keeps panel pcb should socket
    • Replies: 8
    • Forum: Plumbing Jobs | The Job-board
Creating content since 2001. Untold Media.

Newest Plumbing Threads

Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock