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Old 01-25-2019, 12:29 PM   #1
SeaSlugs
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Default interesting cutoff switch

found this while looking for work related stuff:
https://www.mpja.com/Battery-Cutoff-...info/34780+SW/
cant say ive ever seen one with a lever. Might make for a hidden rod operated one, easier to kick on off with a foot, might be easier to operate in a push pull fashon for people with arthritis.

$15 and flat rate $6.95 shipping... they sell all sorts of electrical stuff for cheap.
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Old 01-25-2019, 01:39 PM   #2
1931 flamingo
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Default Re: interesting cutoff switch

Interesting
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Old 01-25-2019, 01:53 PM   #3
BRENT in 10-uh-C
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Default Re: interesting cutoff switch

Am I correct in thinking this is probably rated at 100 amps at 24 volts, ...or about 50 amps at 12 volts which is equivalent to about 25 amps on a 6 volt system??
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Old 01-25-2019, 02:10 PM   #4
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Default Re: interesting cutoff switch

Quote:
Originally Posted by SeaSlugs View Post
found this while looking for work related stuff:
https://www.mpja.com/Battery-Cutoff-...info/34780+SW/
cant say ive ever seen one with a lever. Might make for a hidden rod operated one, easier to kick on off with a foot, might be easier to operate in a push pull fashon for people with arthritis.

$15 and flat rate $6.95 shipping... they sell all sorts of electrical stuff for cheap.
Just don't use it in California! As soon as you cross the state line, this device will give you cancer! The official know-it-all State of California says so!!
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Old 01-25-2019, 04:20 PM   #5
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Default Re: interesting cutoff switch

Quote:
Originally Posted by BRENT in 10-uh-C View Post
Am I correct in thinking this is probably rated at 100 amps at 24 volts, ...or about 50 amps at 12 volts which is equivalent to about 25 amps on a 6 volt system??
yea im betting thats the continuous rating, not the peak rating and for as little as a starter is used your gonna burn up the starter well before this guy.

https://www.harborfreight.com/batter...tch-97853.html
thats rated for only 125A continuous but 500 peak.
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Old 01-25-2019, 05:23 PM   #6
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Default Re: interesting cutoff switch

This is what I am using.. It was given to me by an Auto-electrician friend of mine.. Turn left to isolate battery, turn right to connect.. Very discrete and hidden.

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Old 01-26-2019, 06:37 AM   #7
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Default Re: interesting cutoff switch

Steve: I used one of those and have a friend who did as well. We both had a real power loss due to the tiny contact area when switch was on. At 6 volts you can't stand much loss. Got worse over time too. Hope yours works for you. Bill
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Old 01-26-2019, 06:51 AM   #8
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Default Re: interesting cutoff switch

It is bulkier than the usual switch. As far as the capacity, fwiw, it says it is for heavy duty and it only has to cut off the full current once to do its job!
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Old 01-26-2019, 11:35 AM   #9
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Default Re: interesting cutoff switch

I do not like the idea of an overall cutoff switch because of the added electrical resistance. The key to a successful 6 volt electrical system is to use the heavier gauge wire as originally prescribed and ensure the connections are tight and the insulation is good.

Because the ignition switch carries only the ignition current, the concern may be (if the electrical system is properly maintained) to have a separate "accessories" switch to ensure there is no current drain when the car is parked. I refrain from using an accessory switch and just ensure the wiper and lights are off.

My biggest concern was the reluctance in early automotive days to use separate lower amperage fuses for lights, wiper and horn. Two or three 15 amp fuses would suffice. I ended buying and installing in my '29 Tudor an early Volkswagen Beetle bakelite fuse box because it looked "period". I use it to separately insert fuses for the lights, horn and wiper much like a later car.

Because a reliable electrical system is essential for enjoyment of the car, I am curious as to your thoughts on this?
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Old 01-26-2019, 12:09 PM   #10
BillLee/Chandler, TX
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Default Re: interesting cutoff switch

"Because a reliable electrical system is essential for enjoyment of the car,"


Avoiding burning your car to the ground because of an electrical short qualifies in my book for "essential for enjoyment of the car".



In any case, the cut-off MUST be placed in the GROUND line, and it MUST be placed so that it is easily accessible, not hidden under the floor or inside the hood or some-such.
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Old 01-26-2019, 01:05 PM   #11
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Default Re: interesting cutoff switch

Quote:
Originally Posted by BRENT in 10-uh-C View Post
Am I correct in thinking this is probably rated at 100 amps at 24 volts, ...or about 50 amps at 12 volts which is equivalent to about 25 amps on a 6 volt system??
It would be rated 100 amps at up to 24 volts.
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