Battery cutoff switch

I cannot seem to find an answer, so ill ask.

The naskart was designed to have the main kill switch accessible by a strapped in driver. That makes sense to me. 

However, i cannot seem to find rules on a track worker accessible switch. 

Goals are scca time trials, hillclimbs, nasa tt, etc. So i want to build to the rules.

I just can't seem to find them.

I don't anything wrong with having two in series, so that either one will kill the vehicle. 

I doubt a tech inspector would have a problem with another one outside the vehicle, there is no unfair advantage to be had here.  Usually on the cowl, aren't they?

Would a traditional full disconnect in the rear for the track workers plus an ignition cut off in driver's reach work?  Asking because yeah that was my plan.

On my old Lemons car, we just ran a choke cable from the main kill switch, mounted within reach of the driver, to the cowl. Worked great, cheaper and simpler than two kill switches, one less thing to fail.

In reply to Stampie :

It would. Woth a rear mounted battery like the suprang has. This one, where the battery is, wouldn't make sense. 

However, on ghe cowl would. Drivers or passengers side? Id think passengers for packaging....

obsolete said:

On my old Lemons car, we just ran a choke cable from the main kill switch, mounted within reach of the driver, to the cowl. Worked great, cheaper and simpler than two kill switches, one less thing to fail.

Oh E36 M3. That the answer right here. 

Clamp the sheath near the kill switch end so it operates, make sure no kinks or sharp bends, mark the external end.

obsolete said:

On my old Lemons car, we just ran a choke cable from the main kill switch, mounted within reach of the driver, to the cowl. Worked great, cheaper and simpler than two kill switches, one less thing to fail.

This is what we did for Lemons as well. Switch on the drivers side at the A pillar with a cable to the passenger side A pillar. There were labels on both doors. 

Dusterbd13-michael said:

obsolete said:

On my old Lemons car, we just ran a choke cable from the main kill switch, mounted within reach of the driver, to the cowl. Worked great, cheaper and simpler than two kill switches, one less thing to fail.

Oh E36 M3. That the answer right here. 

Clamp the sheath near the kill switch end so it operates, make sure no kinks or sharp bends, mark the external end.

A T handle type hood release cable like older Fords had would be perfect for an external kill switch pull.  Just need to paint it bright red or whatever the rules want you to do.

In reply to Pete. (l33t FS) :

Just found some on Amazon with a 7 foot cable for $12. On their way. 

So, would the handle be best in the passengers window opening or on the cowl? Again, i never found the rules despite looking, so i don't k ow what the sanctioning bodies want. Other than a kill switch that shuts everything down on the positive side. 

The Lemons rule didn't specify beyond being in reach of the driver and safety workers IIRC.

I don't think they required 2 locations either. 

No clue what the GCR says. 

My Lemon has the switch mounted at the driver A pillar. Easy for driver and track worker to access

Most road racing rules only specify accessible by driver and safety workers.  For outside I like driver's side A pillar, cowl or B pillar.  The safety workers tend to try and get to the driver first and I don't want them to have to run around to the other side of the car to kill power.

I have one switch on the cowl and another one on the dash. This actually the way the NISMO prep manual says to do it.

obsolete said:

On my old Lemons car, we just ran a choke cable from the main kill switch, mounted within reach of the driver, to the cowl. Worked great, cheaper and simpler than two kill switches, one less thing to fail.

I do the same.  It reduces potential electrical points of failure, which can contribute to additional fire risk and reliability issues.  It all comes down to what is specified by the sanctioning body though.

From the SCCA General Competition Rules (GCR):

All cars shall be equipped with a master switch (per GCR Section 9.3. Master Switch) easily accessible from outside the car. It should be located in the rear window just behind the “B” post on the right side. 

Just to make it confusing, the GCR later says:

1. Closed Sports Racing Cars, Production Cars, Improved Touring and GT Cars–In front of the windshield on either the cowl or on top of the fender, but close enough to the windshield to be accessible if the car is overturned. Alternatively, it may be mounted below the center of the rear window or on a bracket welded, clamped or bolted to the roll cage or dash, easily accessible through the open window. (Drilling of holes in roll cage to attach the bracket is prohibited.)

As discussed above, using a cable to connect two switches is pretty common so that the driver can operate the switch as well as a corner worker.

Edit: Added second GCR statement just to make it more confusing .