barmatt

barmatt

Well-Known Member
LZIR Despatch Agent
Just installing an auxiliary heater inside the disco and I need to put an inline fuse on the live wire, does it matter where this fuse is? nearer the battery or nearer the heater?

I'm sure this is a daft question but I'm gonna ask it anyway:rolleyes:

Help as always greatly appreciated :D
 
barmatt said:
Do you mean wire it so it's only live when the ignition is turned on? if so I have no idea how to do that.
Click to expand...

Find a wire that is only live when the ignition is on and use a relay to trigger the supply. Fag Lighter springs to mind. & there's a couple of spare feeds on the fuse box that only come live when ya turn the ignition on.
 
Just a bit of info, a fuse is primarily there to protect a circuit not a componant, so at the start of the circuit is where it should go, think of your consumer unit at home, if a secondary fuse is required to give additonal protection to a particular componant it should be of less value than the first to give discrimination,
Dev
 
Devlin said:
Just a bit of info, a fuse is primarily there to protect a circuit not a componant, so at the start of the circuit is where it should go, think of your consumer unit at home, if a secondary fuse is required to give additonal protection to a particular componant it should be of less value than the first to give discrimination,
Dev
Click to expand...

And according to the Geek to Landyowner translation software on me pooter he means

Put the fuse near the battery/start of wiring & if ya fit a 2nd fuse always make it smaller than the first one.. :rolleyes:
 
yep thats why appliaces have a 13A fuse and the circuit is a 32A breaker, see easy, however there are slow blow,milliamp anti surge to name a few yawn yawn
Dev
 
i well remember years ago doing something silly inside a telly and blowing the 13 amp fuse in the extension lead whist the 3 amp in the telly plug remained intact......
 
redhand said:
And according to the Geek to Landyowner translation software on me pooter he means

Put the fuse near the battery/start of wiring & if ya fit a 2nd fuse always make it smaller than the first one.. :rolleyes:
Click to expand...

Cheers for the translation pikey :D
 
Thats becuase the 13A was protecting upsteam live, you created a fault live to earth or live to neutral after the 3A, and remember all it takes to kill your self is 30 MILLI amps thats 0.03 of ONE AMP, that is why an RCD has a trippng current of exactly 30mA, I remember a old spark saying "Aye lad a little'll do ye", and the back of tellys can reach scary voltages
Dev
 
Last edited:
"
Devlin said:
Thats becuase the 13A was protecting upsteam live, you created a fault live to earth or live to neutral after the 3A,"

still dont explain why the 3 amp didnt blow.... it carried the current that blew the 13 amp






"and remember all it takes to kill your self is 30 MILLI amps thats 0.03 of ONE AMP, that is why an RCD has a trippng current of exactly 30mA, I remember a old spark saying "Aye lad a little'll do ye", and the back of tellys can reach scary voltages "
Dev
Click to expand...

clever of them to make the rcd so it blows at exactly the current that will kill you , have you never heard of factors of safety ,or safety margins....sorry yer spouting bollocks :doh:
 
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