Birty Dastards Jeep Club

Tech Forum => Workshop => Topic started by: YT on October 13, 2014, 02:34:31 PM

Title: One for electrickery practitioners.
Post by: YT on October 13, 2014, 02:34:31 PM

Short and easy for those in the know.
450w on a single switch, sub 45A draw, heavy duty 100A relay. What size fuse ? :D
Thanks in advance.

Title: Re: One for electrickery practitioners.
Post by: georgen on October 13, 2014, 03:13:42 PM

Depends what size wire your using too

Title: Re: One for electrickery practitioners.
Post by: jay140285 on October 13, 2014, 04:14:02 PM

A big one, it won't blow then!


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Title: Re: One for electrickery practitioners.
Post by: YT on October 13, 2014, 05:53:19 PM

It's running a 30a at the minute, but they've only been running for short periods (couple of minutes) without blowing, was thinking of a 40a. Ideally, I want to run a fuse that's easily picked up from halfruads.

Wire used is matched to the gauge on the bars, (the 20,30&40" all use the same gauge) some fancy double shielded stuff allegedly.

Title: Re: One for electrickery practitioners.
Post by: Dave69 on October 13, 2014, 05:59:58 PM

keep it simple..... watts divided by volts = 37.5. closest is 40 amp fuse any lower and the fuse will stand a chance of blowing more often. wire guage to suit to prevent the cable from overheating.

have a look at what they sell and obviously the holder as well, you could look at operating them from a fused relay which then save the draw on the loom running through the car

Title: Re: One for electrickery practitioners.
Post by: jay140285 on October 13, 2014, 06:10:56 PM

Sounds similar to what I said


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Title: Re: One for electrickery practitioners.
Post by: Exdecuk on October 13, 2014, 06:13:50 PM

I assume this is being run directly from the battery and totally seperate to your existing loom?

Title: Re: One for electrickery practitioners.
Post by: YT on October 13, 2014, 06:40:04 PM

Yeah, it's completly separate from the loom, and the 100A relay was used as it was cheaper than a 50a :)
There's a standard size blade fuse holder in place.

Title: Re: One for electrickery practitioners.
Post by: bigjeepzj on October 13, 2014, 06:59:58 PM

Use a large blade fuse like the large ones used in the jeep

Title: Re: One for electrickery practitioners.
Post by: Dave The Sparky on October 13, 2014, 08:39:32 PM

You could use more than one fuse and one relay and just feed the relays coils from the switch.
That way you can have smaller fuses with less chance of an electrical firework display and also have a bit of redundancy built in if one packs in.

Title: Re: One for electrickery practitioners.
Post by: Dave69 on October 13, 2014, 08:42:36 PM

As worded by the sparky...build in redundancy

Title: Re: One for electrickery practitioners.
Post by: Dave The Sparky on October 13, 2014, 08:45:59 PM

I assume these are for light bars in which case deffo do them separately and then you can impersonate the space ship in Close encounters of the third kind....

You will also need some sort of keyboard rigging up at the same time to play the tune as well though :icon_winkle:

Title: Re: One for electrickery practitioners.
Post by: YT on October 13, 2014, 09:21:28 PM

Haha, hadn't thought of that. :D

Title: Re: One for electrickery practitioners.
Post by: j33pky on October 14, 2014, 07:35:59 AM

Quote from: Dave The Sparky on October 13, 2014, 08:45:59 PM

I assume these are for light bars in which case deffo do them separately and then you can impersonate the space ship in Close encounters of the third kind....

You will also need some sort of keyboard rigging up at the same time to play the tune as well though :icon_winkle:

Or a knight industrys 2000 controller?