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fuse
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.
Hi all
We have a Vaillant turbomax plus 828e combi which we found powered off a few days ago. Turns out the 2a glass fuse on the PCB had gone. Replaced and it turns back on but as soon as you start the hot water or heating, it pops again within a few seconds
I have looked as the pump and can...
Hi,
My boiler, which is 3 years old, has stopped working and it turns out it was the fuse.
I had an engineer resolve the issue, but when I turned the boiler off then back on it stopped working.
The fuse that was used was anF2AL250V, that's .2A
Should it have been an F2AH....?
Also, is it 2A...
This morning woke up to no central heating, but the hot water had been on earlier in the morning.
I checked the programmer and it was indicating CH was on.
Went to the room thermostat and it didnt click when rotated, but then started clicking without any input.
I had a spare room thermostat...
Hey. Got home from Christmas with family to find boiler isn't working, no lights on anywhere.
Boiler itself is old but ok. There has been a leak from an upstairs flat and the grey square connector in picture is very wet.
Nothing has tripped on main board...I'm guessing either the connector...
Hi Guys,
Need some help. Potterton Gold H keeps blowing the spur fuse when running ether hot water or heating. System is a Y plan and 3 port valve has recently been replaced however issue has been ongoing customer has said for past 2 years.
Fuse blows within few minutes of running hw or ch...
Hi guys. First post on here. Called out to fault on Alpha HE 33. Fast blow fuse found to have blown. Faulty fan found to be problem. New fan installed and tested. Four days later and a call from customer to say boiler not working again. fast blow fuse found to have gone again. Replaced and gone...
I would like a professional plumber's advice on this attached image, which shows a mains pressure pipe with tap located above the consumer units.
Is this ok for the legal requirements in the UK?
Can someone let me know what the law is on this matter please? have a link? Thanks all.
I have a grant vortex combi and it keeps tripping the main fuse when the programmer calls for heating.
This has just started, it was working fine before.
Anybody got any thoughts
Hi all,
I have a Salamander CT30 shower pump that was installed by a plumber in October 2019 and the other day it would not start.
I checked the fuse first and it was blown so I replaced it. The second the power was switched on the pump started, (or sounded likeit did) but instantly blew the...
Freestanding cooker with 4 gas rings has had the fuse taken from the plug so no electronic ignition for the gas rings. Is the sparker a safety control?does the lack of spark make this at risk or ID?
Recently bought a house and boiler was working fine. Now wont turn on so opened up and saw the 2amp fuse looked like it had blown. So replaced with another 2amp fuse and it keeps blowing that fuse instantly. Any ideas? Im on the verge of moving into it with my family and we have ran out of money...
Hi,
A friend has s plan system, unvented how water tank, ideal logic heat only boiler and potterton programmer (was changed with like for like about 6 months ago).
It keeps blowing the 3a fuse in the fuse spur. Boilers been turned off at the front of the boiler (the control knob) and issue...
I have wired an s plan plus system. Consists of 2 hot water 2 port valves and one central heating 2 port valve. The boiler is a worcester bosch cd classic.
Problem began when i turned the boiler on first time and nothing happened! Found that the internal 2.5A slow blow fuse had blown...
Thermal fuse blown in the above boiler. No part number for it as it Comes complete with the hex. The warranty is 5 months out of date, not sure if gw will entertain this one when I call group service tomorrow.
Can anyone suggest anything....a heating company is selling them on eBay and state...
Anyone any idea where I can get a fuse holder for an Avanta 18v?
It's the 2AT fuse that sits on the PCB. It's sprung and has this silly little metal hook that holds it in place once you twist it. Tiny hook snapped off so fuse wont stay in board so boiler wont run unless you hold the fuse in.
My...
hi oil heads,
Most oil boilers that I service when I isolTe the fuse and take it out, it's never the correct size it should be 13amp most times. Should I leave it or replace it for what it says to be in the spec of boiler manual.
ive had a friend who's boiler is tripping at the fuse board when they turn on the boiler. It is a seal system but it has dropped too zero? I think the pump has stopped work or something and the boiler has over heated and activated the high limit stat too. Why would a boiler pump fail?
It's a...
Hello,
I have a wireless underfloor system controlled by altech receivers and transmitters. There is also a JG speedfit control board and distribution board. As soon as the transmitter connects to the receiver, a green light turns on and the actuator valves on a manifold attempt to turn on. As...
Hello,
A couple of weeks ago I called out a plumber to change a thermostat since the bottom one (Economy 7) wasn't working. Unfortunately the change hasn't worked and since then (due to cost of calling in the plumber again to sort), I have been using the "Peak" switch for an hour a day to get...
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