How to Install a On/Off Switch & Wiring for a Light | eHow How to Install a On/Off Switch & Wiring for a Light. A light and a switch is one of the simplest electrical circuits that demonstrate how electricity works. 120 volt electricity is provided through three wires. The black wire, which is the "hot" wire, delivers the electricity from the distribution panel to the light. The white "neutral" wire.. 4430 Master Battery Cut-Off Switch Wiring Instructions With the engine running, turn the switch off. The engine should stop and all circuits should be off. 4430 Master Battery Cut-Off Switch Function Summary. The 4430 switch has three sets of contacts: Mains (Normally Open, switch off means circuit is off): These 3/8" stud terminals break contact to isolate the battery when the switch is turned off.
Related with cut off on and off switch wiring diagram