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 78 Posts Member #: 8913 Advanced Member seaford, east sussex |
24th Oct, 2010 at 07:36:32pm
hi all, im running a emerald ecu and i want to know the best amp fuse for the following jobs:
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 824 Posts Member #: 2065 Post Whore Wiltshire |
24th Oct, 2010 at 07:53:03pm
It's an easy equasion, it's called ohms law. You divide watts consumed by voltage. So let's say you consume 10 watts. At 12VDC it's 0.83 Amps. At 14VDC it's 0.71A. At voltage increases current drops. You need to know the wattage of each bit of kit then work out the current then either at 50 or 100 percent for fuse size. On 7th Nov, 2011 apbellamy said:
Shaft seems nice and snug On 24th Mar, 2012 apbellamy said:
no no no no, you need more boost! you can never ever come on here and say I have enough boost, that's just silly. On 29th Mar, 2010 Star Mag said:
these give no problems with good head |
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 3329 Posts Member #: 184 Senior Member Melton Mowbray, Pie Country |
24th Oct, 2010 at 09:21:31pm
On 24th Oct, 2010 almichie said:
It's an easy equasion, it's called ohms law. You divide watts consumed by voltage. So let's say you consume 10 watts. At 12VDC it's 0.83 Amps. At 14VDC it's 0.71A. At voltage increases current drops. You need to know the wattage of each bit of kit then work out the current then either at 50 or 100 percent for fuse size. This is totally wrong. A fuse protects the wire feeding the device not the device its self. You need to know that size of cable you are using as that will determine the maximum fuse you can use. http://www.twin-turbo.co.uk
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 4360 Posts Member #: 1459 En-suite user Braintree, Essex |
24th Oct, 2010 at 09:42:49pm
I would of thought a ECU and injectors would only be a couple of amps at most to be honest. 25amps far too high. On 19th Jan, 2010 wil_h said:
I would start the furthest place from the finish. On 24th Mar, 2012 apbellamy said:
I feel all special knowing that I've given your mum my wood. Been neglecting Turbo'd 'A' series.............. |
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 338 Posts Member #: 1911 Senior Member Swindon |
24th Oct, 2010 at 10:05:52pm
As Ben says. A fuse is to protect a fire being started which is caused by over current on a wire so therefore you fit a fuse to protect is. For 2.5mm you run 20 amp and 1.5mm 15 amp. And so on with bigger just run a bigger fuse. |
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824 Posts Member #: 2065 Post Whore Wiltshire |
24th Oct, 2010 at 10:27:21pm
What your saying is correct for 230v AC, not DC and not 12V. Yes the fuse protects the wire but the fuse also needs to be able to blow should the device or wire go faulty. Of it doesn't the device will catch fire as easily as the wire...
On 7th Nov, 2011 apbellamy said:
Shaft seems nice and snug On 24th Mar, 2012 apbellamy said:
no no no no, you need more boost! you can never ever come on here and say I have enough boost, that's just silly. On 29th Mar, 2010 Star Mag said:
these give no problems with good head |
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824 Posts Member #: 2065 Post Whore Wiltshire |
24th Oct, 2010 at 10:34:43pm
I take some of it back...
On 7th Nov, 2011 apbellamy said:
Shaft seems nice and snug On 24th Mar, 2012 apbellamy said:
no no no no, you need more boost! you can never ever come on here and say I have enough boost, that's just silly. On 29th Mar, 2010 Star Mag said:
these give no problems with good head |
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338 Posts Member #: 1911 Senior Member Swindon |
24th Oct, 2010 at 11:22:20pm
As I said. Now that's assuming maximum current for clipped direct cables with free flowing air around. So drop the fuse sizes to what I said and your sorted. |
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78 Posts Member #: 8913 Advanced Member seaford, east sussex |
26th Oct, 2010 at 05:23:30pm
cheers for the advice just looking through the emerald wire diagram noticed it says use a 2 amp fuse (optional) the loom came from emerald so im guessing 2 amp it is, it just sounds like a very small rating.
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