Mayf;
I'm not an official but I see no problem with using a relay to switch off
the fuel pump as long as the relay is a NO (normally OFF) type. Inertia
switches can be tested by whacking it with a big rubber hammer. Hmmm... with
mallets aforethought?
Regards, Neil Tucson, AZ
-----Original Message-----
From: land-speed-bounces@autox.team.net
[mailto:land-speed-bounces@autox.team.net] On Behalf Of drmayf
Sent: Saturday, May 16, 2009 12:43 PM
To: LSR
Subject: [Land-speed] Inertia Switch for Electric Fuel Pump Cutoff
Thumbing my way through the book, I again see that the 2010 season will
require an inertia fuel pump cut off for electric fuel pumps. So, I have
a question regarding the preferred wiring. Anyone on the safety
inspection crew listening? Dan? Here is the question: the inertia
switch can be located in two different manners. One, it can interrupt a
relay control signal and turn off power that way, or two, it can be
mounted in the fule pump power lead directly to turn it off. The
absolute safest woul dbe in the power lead but the other way is also
pretty satisfactory. In that case I would just put the inertia switch
in line with the power switch which turn on the relay. A final
thought...will it need to be tested or is the owner's word good enough
that it worlks? After all we don't fire the safety system to see it it
works, lol...
Any thoughts or comments on this, especially from an inspector type?
mayf
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