Defines standard voltages for AC and DC systems (low, medium, and high voltage).

The IEC standards list uses a specific numbering convention.

| Standard Number | Title & Scope | | :--- | :--- | | | Audio/video, information and communication technology equipment – The replacement for the old IEC 60950 (IT) and IEC 60065 (AV). This is the modern safety standard for laptops, TVs, and routers. | | IEC 60601-1 | Medical electrical equipment – General requirements for basic safety and essential performance – The mother of all medical device standards. | | IEC 60617 | Graphical symbols for diagrams – Standardized electrical symbols for schematics. | | IEC 61340 (series) | Electrostatics – Essential for cleanrooms, flammable atmospheres, and electronics manufacturing. |

Detailed standards for low-voltage switchgear, such as circuit breakers and contactors.

Founded in 1906, the IEC is the world’s leading organization for the preparation and publication of international standards for all electrical, electronic, and related technologies. Unlike local bodies such as the ANSI (USA) or BSI (UK), the IEC provides a unified global language. A product designed to meet an IEC standard can be sold in virtually any market, reducing technical barriers to trade.

| Standard | Title | |----------|-------| | | Safety requirements for electrical equipment for measurement, control, and laboratory use | | IEC 61010-1 | General requirements (overvoltage category, pollution degree) | | IEC 61010-2-030 | Circuits for testing and measurement (CAT II, III, IV) | | IEC 60751 | Platinum resistance thermometers (Pt100) | | IEC 60584 | Thermocouples (type K, J, T, etc.) |

These foundational standards are essential for the design, installation, and maintenance of electrical systems and power infrastructure.