[Vintage-race] battery Cut off with alternator

[fastvee]

I believe my master switch failure was due to oxidation of the terminals. The plastic cut off switches are not sealed very well for racing in the rain. I was able to get it working in the paddock with contact cleaner and repeated actuation, ignored advise to bypass it, and it then failed during the race and cost me a win. Later replaced it with a sealed metal switch like these from Longacre Racing; 
http://www.longacreracing.com/catalog/catlist.asp?catid=14
John Caffrey
Fogelsville, PA

--- On Wed, 1/13/10, Ryan, Richard <RRyan at frk.com> wrote:
What causes these switches to fail?