30 Essential Electrical Letter Symbols
Live wire — LNeutral — NProtective earth — PEAlternating current — ACDirect current — DCNormally open — NONormally closed — NCPush button switch — SBSelector (rotary) switch — SAIsolator switch — QSAC contactor — KMIntermediate relay — KAThermal overload relay — FRFuse — FUCircuit breaker — QFForward — FWDReverse — REVPositive — VCCGround — GNDMotor — MStart — STStop — STPRun — RUNClose — ONOpen — OFFTransmit — TXReceive — RXInput — INOutput — OUTGenerator — G
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