Simbologia Electrica Americana Y Europea.pdf Portable Jun 2026

| Component | American (ANSI) | European (IEC) | Key Difference | | :--- | :--- | :--- | :--- | | | Zigzag line ($\wedge\wedge\wedge$) | Rectangle (□) | IEC uses a fixed, boxy shape; ANSI uses a zigzag. | | Coil / Relay | Circle or semi-circle | Rectangle with parallel lines | IEC emphasizes a clear "box" for control elements. | | Contacts (NO) | Two parallel lines converging | Line with angled break (∠) | IEC often includes a cross or slanted line for switches. | | Ground | Stacked decreasing lines ( ) | Solid horizontal line with three downward vertical lines (┴) | IEC ground is more schematic; ANSI resembles a chassis or earth symbol. | | Fuse | Rectangle with a line through it | Rectangle with a curved "sag" or simple rectangle | IEC often shows a melting element. | | Transformers | Two semi-circles adjacent | Two full circles or rectangles with parallel lines | IEC style is more angular; ANSI is curved. |

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| Component | American Symbol (NFPA) | European Symbol (IEC) | | :--- | :--- | :--- | | | A circle with the letter "M" inside. | A circle with a line crossing the supply wires. | | Overload Relay | A curved heater element in series with a switch. | A square with a wavy line inside. | | Timer (On-Delay) | A relay coil with a small "live" arc. | A rectangular block with "t" and a rising ramp (⬈). | | Pushbutton (NO) | Plunger pushing against two terminals. | A pendulum-like line returning to center. | | Ground | Three decreasing horizontal lines. | A vertical line with one horizontal line (and sometimes a triangle in older DIN). | | Component | American (ANSI) | European (IEC)