Battery cut off switch capacity.
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=142939
Printed Date: 17 Aug 2025 at 5:55pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Battery cut off switch capacity.
Posted By: jerbob
Subject: Battery cut off switch capacity.
Date Posted: 28 Sep 2017 at 4:06pm
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A question for the group. Adding a Battery Cut off switch. A couple of you sent me great links for this and one for example is "Little Switch". Do I need to worry about how may amps the switch is rated for? I see some at 300, some at 250 sustained and 650 or 800 amps short bursts. Just curious. |
Replies:
Posted By: DMiller
Date Posted: 28 Sep 2017 at 4:34pm
| At least 300 minimum, would hang with higher if will fit the space. |
Posted By: R.KYLE
Date Posted: 28 Sep 2017 at 6:40pm
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JUST INSTALLED A MASTER SWITCH ON MY HD16 A WEEK AGO. I PUT THE SWITCH ON LIVE SIDE OF BATTERY. WHEN I STARTED TRACTOR SWITCH WOULD NOT SHUT OFF. I PUT THE SWITCH ON GROUND SIDE AND IT WORKS WELL. |
Posted By: jerbob
Date Posted: 28 Sep 2017 at 7:32pm
| Looked at the diagram in the parts manual and you are correct. Switch goes to the positive to ground side. How many amps is your cut off switch rated for? Curious. |
Posted By: jerbob
Date Posted: 29 Sep 2017 at 7:34pm
My thought as well DMiller. Thank you. |
DMiller wrote:Posted By: Coke-in-MN
Date Posted: 29 Sep 2017 at 8:17pm
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If your controlling a starter motor or just a solonoid for the starter motor would be the question as starter could draw up to 1200 AMP or full capacity of batteries In some heavy truck use a separate solonoid is set between starter motor and power supply - this is then controlled by key or cut off so starter motor can't be jumped or power is shut off to starter if it stays engaged ------------- Life lesson: If you’re being chased by a lion, you’re on a horse, to the left of you is a giraffe and on the right is a unicorn, what do you do? You stop drinking and get off the carousel. |
Posted By: jerbob
Date Posted: 30 Sep 2017 at 7:47am
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Thank you Coke. I had no idea ithere could this large of a draw. Many of the cutoff switch's I have found have a sustained 300 to 400 amp draw and a spike of up to 1200 amps. |
Posted By: jaybmiller
Date Posted: 30 Sep 2017 at 8:53am
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2 things.. 1) go with the highest rated one.. you NEED reliability. 2) it makes NO difference whether the switch is put in the -ve of +ve line from the battery. Jay ------------- 3 D-14s,A-C forklift, B-112 Kubota BX23S lil' TOOT( The Other Orange Tractor) Never burn your bridges, unless you can walk on water |
Posted By: jerbob
Date Posted: 30 Sep 2017 at 7:14pm
| Thank you Jay. That will be my plan. I have 30' of #00 welding cable and am replacing the cables and new batteries. 2 -12volt truck batteries. |
Posted By: Coke-in-MN
Date Posted: 30 Sep 2017 at 8:48pm
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to keep the welding cable protected I ran mine through a old garden hose (plastic reinforced 3/4" ) has stood up well and have no worry about the insulation breaking down . Seem welding cables will deteriorate under grease or petroleum products and heat is other killer . ------------- Life lesson: If you’re being chased by a lion, you’re on a horse, to the left of you is a giraffe and on the right is a unicorn, what do you do? You stop drinking and get off the carousel. |
Posted By: DiyDave
Date Posted: 30 Sep 2017 at 9:02pm
| Sunlight also makes weld cable insulation deteriorate, too, IMHO... |
Posted By: jerbob
Date Posted: 30 Sep 2017 at 9:22pm
| Good one Coke. My plan exactly. I have enough good Rubber 3/4" hose to cover all the wire cable. |
Posted By: jerbob
Date Posted: 30 Sep 2017 at 9:25pm
Thank you Dave. My old girl sleeps in the barn now. Probably first time in 40 years she's ever had a roof over her head. |