chewee

alright fellas,nearly finished the track car but got a few bits left to do like the switch control panel and wiring, basically im wiring in my own rad fans x2 , interior heater fan,wipers and im not technical enough to be able to work out what size circuit breaker i need for each one so if anybody could give me a size of circuit breaker for each one that would be great! going to use circuit breakers rather than fuses you see

also im getting rid of the ignition barrel and going to have a switch for ignition and a switch for fuel pump and push button starter, can anybody tell me the proper way of wiring this?? as id rather do it right the first time!!

thanks gaian guys

alcazar

iTrader: (2)

To choose circuit breakers, use the formula:

Current = Wattage of appliance/voltage,

ie: divide the wattage of wehatever you want to protect by 12.

For the starter circuit, you need to identify the two wires at the ignition barrel that do a) switch on ignition, (ie: all dash warning lights on), and b) the one to the starter, usually a thicker wire. The first needs to be atsndar, but heavy duty on/off switch, the second, a sprung switch, again, capable of at least 25 amps.

However, as with anything, if you don't know what you are doing, should you really be doing it?

chewee

I am more than capable of doing pretty much anything on anything but when it comes to electronics Im not so great at stuff like that as I simply don't have the patience or knowledge to do things properly to a high standard so I'd rather ask people who know and risk people thinking I'm an idiot than just doing it and causing a serious danger and actually proving to people I'm an idiot! If that makes sense!

I know what each of the wires are to do the starter and ignition but what I ment is should I run relays and stuff like that?

Cheers again bud

alcazar

iTrader: (2)

Not really necessary to run relays, the ones needed are there already, the ignition switch is just that: a switch.

Have a look here: www.vehiclewiringproducts.co.uk, not the cheapest, but quality stuff, including cable in all sizes/colours and in cut lengths, switches etc.

DO solder any cable joins and use heatshrink. DO solder connectors, don't use those horrid crimps, I use bare connectors, crimped, THEN soldered, with a nylon cover slid over them.
DO use the correct grade of cable, that site advises on current carrying capacity, or go one up from whatever Subaru use

Andy Murdoch

One small point mate, the c/brkr has to protect the wiring as this is likely to fry first with disasterous results if a loom catches fire. Make sure the wiring for the circuit you are protecting can take the current rating or this will fry first before the breaker pops.