DONT PUT A 30A fuse

23rd August 2011, 20:10

DONT PUT A 30A fuse in the bottom right hand glove box if you do, u will melt the power for the cd player!!!!! 20A max

cheers

23rd August 2011, 20:16

common sense would tell you not to put the incorrect fuse in . . .

23rd August 2011, 20:20

Theres a reason why you use differnt amp fuses for different peice of equipment, they dont just slot themin randomly.

3 from thebottom 8 from the top please carol

23rd August 2011, 20:22

Common sense would tell me to either put the same rated or lower rated fuse in anything.Otherwise in a car for example the higher rated fuse takes longer to blow & sets fire to the wiring.

23rd August 2011, 20:42

common sense would tell everyone on here that the fuse isnt the reason for the wire melting. there is obviously a fault somewhere,

23rd August 2011, 20:45

Alright alright leave him alone he may have no common sense

23rd August 2011, 20:47

Quote:

Originally Posted by monka

common sense would tell everyone on here that the fuse isnt the reason for the wire melting. there is obviously a fault somewhere,

the reason for the fuse it to stop the damage going any further.

like the dam which stops the river flooding the little village. without it, it could potentially be dangerous.

allowing more current to pass through the fuse, will allow the damage to spread to another piece of equipment, making the situation worse, and going around in circles whilst something else breaks and so forth and so on.

people just assume that a fuse, is a fuse.
no, its rated for safety. not just for a pretty fucking pattern.

also, i removed my fuses because they kept blowing...and there wasnt any faults on the system i was using, just 150amp fuses were going bang, and i couldnt fit anything bigger into my breaker.

23rd August 2011, 20:54

Quote:

Originally Posted by tonto_VTR

the reason for the fuse it to stop the damage going any further.

like the dam which stops the river flooding the little village. without it, it could potentially be dangerous.

allowing more current to pass through the fuse, will allow the damage to spread to another piece of equipment, making the situation worse, and going around in circles whilst something else breaks and so forth and so on.

people just assume that a fuse, is a fuse.
no, its rated for safety. not just for a pretty fucking pattern.

also, i removed my fuses because they kept blowing...and there wasnt any faults on the system i was using, just 150amp fuses were going bang, and i couldnt fit anything bigger into my breaker.

not really, a fuse isnt a a 'dam' as such,

if a certain peice of equipment, the stereo for example, use's 15 amps, it will use that all day long, whether or not there was a fuse inline, if you put a 30 amp fuse in, it doesnt mean that the stereo is now using 30 amps. it means that things will have to go more 'wrong' before the fuse pops.

putting a 30 amp fuse in place of a 15 20 amp fuse wont cause the wiring to melt, as if there isnt anything wrong with the wiring or compoent, you could run it straight off the battery no problem at all,

however
if the wiring from the fuse to the headunit, is only rated at 20 amps, and there is a fault with the stereo and it starts drawing 25amps, then yes, wiring will start to melt

23rd August 2011, 23:10

Thats like telling people not to put a screw wrapped in a kitkat wrapper in a plug!

They are rated for a reason, with a margin for increase. With the 2mm loom cable being rated at 25A, i think it was silly to put a 30A fuse in.

23rd August 2011, 23:25

yeah, they are rated to the component and the wiring coming out of it.

a fuse doesnt control current flow, adding a bigger fuse doesnt mean more current will pass through the fuse, it means it will take more current to pop the fuse.

yeah putting a 30 amp fuse in a 25 amp loom is dangerous, but its only dangerous if the components on the other end of the wire draw more than 25 amps, ie, if you have a light bulb on the end, and it only draws 15 amps, it wont be a problem, the problem arises when the bulb or the wiring goes faulty, and starts to draw more than the 25 amp cable can take. put a 25 amp fuse in, and it will pop, saving the wire, putting a 30 amp fuse in will mean the wire over heats, BUT ONLY IF THERE IS A FAULT

basically, your wiring is only going to melt and break if there is a fault somewhere AND you have a fuse to big. YOU CANT MELT WIRES FROM JUST USING A BIGGER FUSE, THERE NEEDS TO BE A FAULT SOMEWHERE AS WELL.

23rd August 2011, 23:37

Quote:

Originally Posted by monka

yeah, they are rated to the component and the wiring coming out of it.

a fuse doesnt control current flow, adding a bigger fuse doesnt mean more current will pass through the fuse, it means it will take more current to pop the fuse.

yeah putting a 30 amp fuse in a 25 amp loom is dangerous, but its only dangerous if the components on the other end of the wire draw more than 25 amps, ie, if you have a light bulb on the end, and it only draws 15 amps, it wont be a problem, the problem arises when the bulb or the wiring goes faulty, and starts to draw more than the 25 amp cable can take. put a 25 amp fuse in, and it will pop, saving the wire, putting a 30 amp fuse in will mean the wire over heats, BUT ONLY IF THERE IS A FAULT

basically, your wiring is only going to melt and break if there is a fault somewhere AND you have a fuse to big. YOU CANT MELT WIRES FROM JUST USING A BIGGER FUSE, THERE NEEDS TO BE A FAULT SOMEWHERE AS WELL.

ok so you run you 2000w amp for example on 8gauge wiring with a 40amp fuse. you turn it up too loud and blow the fuse, try again and get the same thing so then you put 60amp fuse in, turn it up to the same volume and it works and then overloads the cable causing it to melt/catch fire. is there a fault somewhere else??

theres no fault elsewhere as your using cable not capable of doing the job

23rd August 2011, 23:52

ok, take fault, and read fault/unsuitable wiring.

but its not because your putting a bigger fuse in that the wire melts, its because your not using a big enough wire.

24th August 2011, 05:06

lol at Monka. Reminds me of one of them Jesus people readin jesus script from the bible to transform people.

24th August 2011, 06:46

Quote:

Originally Posted by Kyza

lol at Monka. Reminds me of one of them Jesus people readin jesus script from the bible to transform people.

and how? being that i've been into electronics for 12 years.

its not the fuse that cause's the wiring to melt, its the fact that the wiring is to small for the intended purpuse, or there is a fault somewhere. having a fuse too big simply means that rather than the fuse popping, the wire gets hot and melts, but its not because of the fuse that it melts, yes it allows it to happen, but its not the cause of the problem.

24th August 2011, 07:02

if anyone would like to tell me where exactly i'm wrong with the following explaination, please let me know, although only if your good with electronics, as obviously i need a few pointers

in the above diagram, the wire is rated to 20amps,
bulb B draws 10 amps.
fuse A is a 15 amp fuse.

no problem, circuit will work fine, you could replace fuse A with a 25amp fuse, it will still work, you can replace it with a 40 amp fuse, the circuit will still work fine, wiring wont melt, as the bulb is only using 10 amps, so long as the wire and bulb stay in good condition, the circuit will only ever draw 10 amps.

how ever,
introduce a new bulb, that draws 30 amps,

your original 15amp fuse will pop.
put in a 40amp fuse, the bulb will work, how ever it will be trying to draw 30amps through a 20amp wire, this wire gets hot and melts.

it doesnt melt because of the fuse though, it melts because the circuit wasnt designed to work with a 30amp bulb, it was designed for a 10amp bulb, this is the problem, not the fuse.

if anyone with a background in electronics would like to tell me where i'm going wrong, please tell me.

24th August 2011, 12:52

Quote:

Originally Posted by monka

if anyone with a background in electronics would like to tell me where i'm going wrong, please tell me.

Thats correct, the idea of the fuse is to protect the device and the wiring. But its a Lamp not a Bulb

24th August 2011, 15:18

Quote:

Originally Posted by monka

and how? being that i've been into electronics for 12 years.

its not the fuse that cause's the wiring to melt, its the fact that the wiring is to small for the intended purpuse, or there is a fault somewhere. having a fuse too big simply means that rather than the fuse popping, the wire gets hot and melts, but its not because of the fuse that it melts, yes it allows it to happen, but its not the cause of the problem.

Cause you keep going on and on lol

Could get a job as a Church Bible reader person that stands in the middle of a town reading torys over n over again quite easily.

24th August 2011, 15:51

Monka clearly knows his stuff, (just got my dad to check everything he said haha) He's a chief electrical engineer.

Lets not argue with him!

24th August 2011, 22:46

well this is all obvious isnt it, like sticking a truck engine in a saxo the chasise and struts would be fU cKed