circuit breaker installation ??

[egbert]

Hello guys,

I need some help in installing this battery cut-off switch
Any pics to clarify would be great

thanks and rgds Egbert

[ejboyd5]

I guess, broadly speaking, that is a "circuit breaker," in that turning the handle will indeed disrupt the flow of electrons through a circuit. More usually, it is called a battery cut-off switch with a removable handle made by Hella. It is a very fine switch, often used in marine applications, and will give many years of use. I have the same switch installed in the so-called "smuggler's box" with the handle protruding through the wall into the cockpit area below the dashboard. Very easy to reach from the driver's seat, almost invisible (particularly if you remove the red handle) and provides a positive cut off of all the vehicle's electrics. I fabricated new cables using crimp-on connectors for connection to the battery and remember that it was a very easy installation. If I get to another computer where some additional files exist, I will attempt illustrations.

[egbert]

Thanks for the info

Yes please , some pics will help

rgds egbert

[PStey]

Egbert,

What are you trying to achieve by installing that switch? Theft protection, preventing battery discharge or for motorsport purposes (in which case you might want to consider another type).

Groeten

[kenikh]

This:

[egbert]

Hi
I need it for Insurance, theft protection
rgds egbert

Egbert,

What are you trying to achieve by installing that switch? Theft protection, preventing battery discharge or for motorsport purposes (in which case you might want to consider another type).

Groeten

[911pcars]

Hello guys,

I need some help in installing this battery cut-off switch
Any pics to clarify would be great

thanks and rgds Egbert

As a master switch (for insurance purposes), install this in series with the ground cable. That is, select a location to mount the switch (via bracket, chassis sheet metal, etc.), then extend the battery ground cable to this switch, then another length to a good chassis ground. You will need 2 ground cables with eyelet connectors to the switch, to ground and a regular clamp connector to the battery ground post.

Putting the switch on the positive (source) side of the battery is also possible, but I think it's good practice to protect (not expose) source conductors continuously, from battery to starter.

Don't use the above type switch to stop a running engine. For track applications, regs usually require a similar looking switch, but one that also contains additional circuits to open the ignition circuit and to direct alternator output current to ground through a large resistor.

[PStey]

Sound advise, only issue being that on a two battery setup there are two ground cables that need to be switched. So either use two switches for that or put one switch in the cabel running to the back of the car (starter motor).

[savaden]

My switch came with brackets that allow bolting it directly to the body in place of the ground cable. The ground cable is then attached to the other pole of the switch. I installed a cable pull from the dash to be able to disconnect it in a hurry. This is a 1966 installation, and as you know, YMMV...

SV

[egbert]

Thanks for all the info
The pic made it complete

Can anyone tell me where to get such a handy bracket?
Rgds Egbert