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Author Topic: Need to disconnect the SAI  (Read 2642 times)

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KillerWatt

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Re: Need to disconnect the SAI
« Reply #15 on: 24 November 2009, 20:29:34 »
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50A fuse removed... silence is golden ! Cheers for the advice  :y
A photo of which one would make a great guide ;)
IIRC, there is only one 50A fuse (in the fusebox next to the battery).
« Last Edit: 24 November 2009, 20:30:23 by KillerWatt »
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KillerWatt

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Re: Need to disconnect the SAI
« Reply #16 on: 25 November 2009, 08:17:52 »
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The SAI pump surly cant be 50A can it?  :-? :-? :-? :o :o
No it isn't, but the initial start up current is pretty damn close.
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Andy H

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Re: Need to disconnect the SAI
« Reply #17 on: 25 November 2009, 10:58:33 »
To avoid over stressing cables and fuses you should try and select a fuse & cable rated at twice the current you expect.

A 50A fuse is intended to blow at 50A. If you run at the limit things start to get warm and the voltage drop can cause problems.
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bigdods

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Re: Need to disconnect the SAI
« Reply #18 on: 25 November 2009, 20:59:28 »
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50A fuse removed... silence is golden ! Cheers for the advice  :y
A photo of which one would make a great guide ;)
IIRC, there is only one 50A fuse (in the fusebox next to the battery).

Correct, there was only one 50A fuse. I will take a piccy of the fusebox at the weekend and post up for use as a reference - is this something worth adding to the Technical guides ?
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KillerWatt

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Re: Need to disconnect the SAI
« Reply #19 on: 25 November 2009, 21:02:44 »
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To avoid over stressing cables and fuses you should try and select a fuse & cable rated at twice the current you expect.

A 50A fuse is intended to blow at 50A. If you run at the limit things start to get warm and the voltage drop can cause problems.
;D ;D
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Marks DTM Calib

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Re: Need to disconnect the SAI
« Reply #20 on: 25 November 2009, 21:46:30 »
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To avoid over stressing cables and fuses you should try and select a fuse & cable rated at twice the current you expect.

A 50A fuse is intended to blow at 50A. If you run at the limit things start to get warm and the voltage drop can cause problems.


Nah....I2t mate!
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Marks DTM Calib

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Re: Need to disconnect the SAI
« Reply #21 on: 25 November 2009, 21:48:04 »
Best explanation I can find is here:

http://www.circuitprotection.ca/fuseology.html

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Andy H

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Re: Need to disconnect the SAI
« Reply #22 on: 25 November 2009, 22:58:20 »
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Best explanation I can find is here:

http://www.circuitprotection.ca/fuseology.html

:y


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The SAI pump surly cant be 50A can it?  Huh Huh Huh Shocked Shocked
The point I was going to make (but failed  ::)) was that a 50A fuse is probably protecting a circuit that normally draws around 25A.
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Marks DTM Calib

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Re: Need to disconnect the SAI
« Reply #23 on: 26 November 2009, 08:36:09 »
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Best explanation I can find is here:

http://www.circuitprotection.ca/fuseology.html

:y


Quote
The SAI pump surly cant be 50A can it?  Huh Huh Huh Shocked Shocked
The point I was going to make (but failed  ::)) was that a 50A fuse is probably protecting a circuit that normally draws around 25A.

Again, it depends on the fuse type.

The circuit (with the correct fuse type) could be 40A with an in-rush current of 150A for a short period.

Also remember, a fuse does not protect the circuit, it protects the supply (as if it blows, there is already a fault in the circuit)
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