Battery Disconnect Switch

Wouldn't cables of the same color be more proper? I'm clueless on things electrical but just think one color per run would be the way to go. Bob
I installed a cut-off switch last winter. Article is at http://www.cedarcreekas.org/TechTopics/CutOffSwitch.pdf Switch is in the ground line as it should be, it is placed so that the lever extends above the carpet just under the front edge of the seat where it is easily accessed but pretty much out of sight.
 
I have one of the switches with the green plastic knob that screws a contact down onto the neg battery terminal or lifts it off the terminal to disconnect the battery from the circuit in my car. Never had an issue with it and see no evidence of arcing or burning or melting. Is this the one that is called junk and considered unsafe ?


I have had bad luck with those green switches. (two went bad)
Mine were pot metal that breaks after being tightened and loosened too many times and fails open.
I replaced mine with the heavy brass switch through the firewall that I turn off and on with my toe.
 
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