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10-18-2021, 02:20 PM | #1 |
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Power shut-off switch
My car came with a shut-off switch mounted to the firewall just above the clutch pedal. I didn't like the looks of it, so removed it and welded the holes closed. I expect to still want a shut-off, but not in that location. Are shut-offs always on the power cable? Is there any reason why they can't be on the ground side?
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10-18-2021, 02:34 PM | #2 |
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Re: Power shut-off switch
I have mine on the ground side and believe that is the preferred way.
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10-18-2021, 02:34 PM | #3 |
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Re: Power shut-off switch
We'll see what the "experts" say, but my understanding is that anywhere in the battery circuit would do the job...
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10-18-2021, 05:07 PM | #4 | |
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Re: Power shut-off switch
Quote:
My opinion regarding disconnect switches for what its worth. When disconnecting a battery you should always disconnect the ground first, or so my auto shop teacher said way back when. If you start with the power side and the wrench slips and touches ground, instant arc welding. Same applies to the shut off switch. Have it on the ground side. If you switch the hot side everything before the switch can potentially make contact with ground with the resultant spark. Again, JMO.
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10-18-2021, 05:20 PM | #5 |
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Re: Power shut-off switch
The switch can be mounted either way, but, the ground cable is preferable.
I like them in a handy location, like in the seat riser. |
10-18-2021, 06:10 PM | #6 |
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Re: Power shut-off switch
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10-18-2021, 06:21 PM | #7 |
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Re: Power shut-off switch
Mine is on the ground side and is located here on my ‘31 coupe
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10-18-2021, 06:25 PM | #8 |
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Re: Power shut-off switch
I think you will find the majority use the ground side, I’ve personally not seen one on the power side. Mine is located on the floor at the seat riser.
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10-18-2021, 07:04 PM | #9 |
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Re: Power shut-off switch
IIRC at least one of the major race sanctioning bodies require that the disconnect switch be the hot side.
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10-18-2021, 07:50 PM | #10 |
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Re: Power shut-off switch
I have 4 Model As and every one of them has the switch on the earth side. Just where is the best place to mount it is a personal thing but in my Tudor, it is accessed through a slot in the carpet between the two front seats. It is mounted on the crossmember and you have to look carefully to see the slot where I poke my finger through to throw the switch. All of the others are on the seat riser between my legs. To do that, I have had to buy longer cables to get from the battery across tot he RHS of the car but so what.
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10-19-2021, 06:40 AM | #11 |
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Re: Power shut-off switch
If you have an extra ground cable, make sure it is switched !!
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10-19-2021, 06:57 AM | #12 |
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Re: Power shut-off switch
When I mounted my kill switch I went to Snyder's and bought two cables that were a perfect fit. My switch is in the ground side and is mounted in the seat riser. Then I built a small wooden box around the switch so anything under the seat (jack, tools, etc.) will not slide around and hit the business end of the switch.
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10-19-2021, 08:38 AM | #13 |
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Re: Power shut-off switch
Bruce from MN has a very nice installation!!
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10-19-2021, 09:18 AM | #14 |
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Re: Power shut-off switch
Just make sure the switch you use will not open with a bump from your foot, a tool, or etc accidentally. Remember, the battery is basically the voltage regulator on an A. Remove the battery and the voltage from the generator will burn out bulbs etc in a big hurry!
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10-19-2021, 10:05 AM | #15 |
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Re: Power shut-off switch
[QUOTE=Bruce of MN;2067925]Mine is on the ground side and is located here on my ‘31 coupe
Is that one of the switches w/a removable handle? That would make a good security feature.
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10-19-2021, 03:14 PM | #16 |
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Re: Power shut-off switch
All good input. Thanks to everyone.
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10-19-2021, 08:14 PM | #17 | |
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Re: Power shut-off switch
[QUOTE=katy;2068119]
Quote:
https://www.fordbarn.com/forum/album...ictureid=43950 |
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10-19-2021, 09:59 PM | #18 |
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Re: Power shut-off switch
How big of a hole is needed?
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10-19-2021, 11:43 PM | #19 | |
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Re: Power shut-off switch
Quote:
Chris W. |
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10-20-2021, 05:07 AM | #20 |
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Re: Power shut-off switch
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