Wiring undercar LED

Oh and i've been there, got it quick but copping CO2 in the face for the next month isn't fun, near impossible to get rid of it all, luckily still had the car tho
 
Dont be soo sure, they are a good protective device to include in the circuit but they don't make it fire proof! For example you can get a hot joint potentially which can cause a fire even though the circuit isn't drawing enough power. Not likely with a few LEDs on 12V but possible. Other possibility is one of your joints/wires comes into contact with a grounded object but still doesn't have a high enough current draw to blow a fuse....
 
exactly what happen to me small cut in insulation grounded out and started heating up to the point of ignition. Fuse was installed.
 
naa, i thought about putting a knife it to pull one out and look closer though...lol
 
Ryan said:
Dont be soo sure, they are a good protective device to include in the circuit but they don't make it fire proof! For example you can get a hot joint potentially which can cause a fire even though the circuit isn't drawing enough power. Not likely with a few LEDs on 12V but possible. Other possibility is one of your joints/wires comes into contact with a grounded object but still doesn't have a high enough current draw to blow a fuse....
Click to expand...

if you have the correct fuse all should be well.

heat= resistance wich equals a higher current draw wich would pop the fuse. just saying.

if you duno what fuse you need divide the wattage of the light by 12(volatge). that'll give you your current draw.
 
Wouldn't a greater resistance in a wire due to heat cause lower current? I=V/R? Means a larger R is a lower I? Im just applying what I learnt in physics last year, might be wrong though
 
Joshy_morris said:
Ryan said:
Dont be soo sure, they are a good protective device to include in the circuit but they don't make it fire proof! For example you can get a hot joint potentially which can cause a fire even though the circuit isn't drawing enough power. Not likely with a few LEDs on 12V but possible. Other possibility is one of your joints/wires comes into contact with a grounded object but still doesn't have a high enough current draw to blow a fuse....
Click to expand...

if you have the correct fuse all should be well.

heat= resistance wich equals a higher current draw wich would pop the fuse. just saying.

if you duno what fuse you need divide the wattage of the light by 12(volatge). that'll give you your current draw.
Click to expand...

not sure if ryan would be the guy to argue against when it comes to this stuff.
 
what he says is correct, if saying the fuse is incorrect.

im not arguing. but considering this is my job to know this stuff, i might know a thing or 2 aswell
 
skippy said:
Wouldn't a greater resistance in a wire due to heat cause lower current? I=V/R? Means a larger R is a lower I? Im just applying what I learnt in physics last year, might be wrong though
Click to expand...
i higher resistance would cause lower current draw yeah, but it doesnt work that way with dirty terminals/bad connections as such, the connection will just get hot , wich in most cases will pop the fuse, but yeah what ryan says is correct, if it doesnt pop the fuse youve got yourself a fire.

to get where im coming from (im terrible at explaining things)

lets say youve got a bad connection on your starter terminal, if you kick over your starter its going to draw the current it needs to start yeah? even though theres now a resistance itll draw more current, thus heating up your bad connection (very common on commodores).

i hope you see what im on about lol. im trying to explain it well
 
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