[Land-speed] Electrical Wiring in Race Car

[neil at dbelltech.com]

Dave;

I agree-- switch & relay contacts, etc are rated separately for AC and DC
operation. Make sure the toggle switches are rated for high current DC
operation; using a 110VAC rated toggle switch on 12 or 24VDC will insure
early failure-- the contacts are different for AC & DC operation.

Regards, Neil   Tucson, AZ

-----Original Message-----
From: land-speed-bounces+neil=dbelltech.com at autox.team.net
[mailto:land-speed-bounces+neil=dbelltech.com at autox.team.net] On Behalf Of
Dave Dahlgren
Sent: Saturday, April 12, 2008 9:31 AM
To: Benn; Dick J; lsrlist autox
Subject: Re: [Land-speed] Electrical Wiring in Race Car

With 4 or 6 gage I would put in a 100 amp fusible link with 8 ga run a 60 
amp one..
If you need that much electricity run a alternator rated for more than the 
connected loads as well
Do not use AC rated amperage for DC it is not the same also goes for 
switches and relays...
Make sure you have grounds equal to the task as well. Every trip to the salt

change the ground wiring it will fail first, a polarity thing..
The chassis is not ground ever.. Like all roads lead to Rome in theory 
anyway I would have picked Paris for my own reasons not because it is Paris 
but because there is a 5'6" blonde hair blued eyed beauty I spend some 
memorable time with living there..LOL all grounds lead to a common point 
with large gauge wires larger than the feed as they degrade quickly..
Belden wire should have an online chart for amperage and while their wire is

not my wire of choice at least not the automotive ones you can get them at 
NAPA and know what they are rated for...
Dave
----- Original Message ----- 
From: "Benn" <karhu at california.com>
To: "Dick J" <lsr_man at yahoo.com>; "lsr list autox" 
<land-speed at autox.team.net>
Sent: Saturday, April 12, 2008 11:48 AM
Subject: Re: [Land-speed] Electrical Wiring in Race Car


> Basically it's just a matter of adding up all the potential concurrent 
> loads
> on the downstream side of the fuse panel (current draw for each motor,
> etc.).  Once you have the total amperage required, a DC chart which
> undoubtedly will be provided by someone else on the list, will provide 
> your
> answer.  I'd guess 6 or 8 ga. stranded will do the job. Since you wouldn't
> expect each fused circuit to run at the maximum rating of each circuit's
> fuse, you don't have to make the feed wire large enough to handle the sum 
> of
> all the fuses, although that would be a very conservative way to look at 
> it.
> Benn
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