Learn how to wire a SPST switch with a helpful wiring diagram. Find step-by-step instructions and tips to complete your electrical project.. Easier to setup and wire too Less required cabling Not a common design Mechanics of the SPST Switch The SPST mechanical switch has two terminal connections - the NO (Normally Open) and the C (common). When the switch is actuated, the circuit is closed (or made) and current flows from the common terminal through to the normally open terminal.
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This article will guide you in connecting relay wiring diagram of different relays, like 4-pin (SPST), 5-pin (SPDT), and 8-pin (DPDT) relay to a circuit.. Single pole double throw & single pole single throw automotive relays. Numbered terminals refer to the coil, common, normally open and normally closed contacts.