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Electrical schematics are an electricians road map. When troubleshooting electrical faults in control circuitry, upon opening the control panels door you are faced with a massive amount of wiring that seems to go everywhere. The schematic has a pictorial assessment of where each and every wire goes and what it is connected to. It allows you to trace circuit voltages without having to physically start at one end of the wire and see where it goes to. Reading the schematic you can read what the circuit is designed to do and where the voltage path should go if the system is working properly. A schematic is the main tool for troubleshooting electrical control circuitry. Without it troubleshooting can take up to four times the length of time it takes to find the fault.

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Q: What are electrical schematics used for?
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