Nema Symbols

Ohmmeter symbols.

Nema symbols. Frequency meter symbols. Ammeter symbols. Nema system symbols. Here below the cross reference of common schematic wiring diagram symbols used throughout various parts of the world.

Comparison of nema and iec schematic diagrams general with the increasing emphasis on globalization many industries are now looking to all parts of the world to produce market and sell their products. There is an equivalent to an rcbo which is a gfci breaker. But for us the equivalent to an rcbo would be an equipment arcing ground fault breaker ie 30ma gf trip. The following tables describe the device and show the symbol by area of usage.

Electric clock symbols. Diagrams device designations and symbols published by national electrical manufacturer. Thus the iec international electrotechnical commission was established in 1906 originally tasked with defining international symbols electrical component standards nomenclature and overall ratings of electrical machinery and apparatus. Wattmeter symbols.

Electrical test control equipment symbols. Today iec works closely with the international organization for standardization iso and the international telecommunication union itu to define global. Electrical manufacturers are no exception. Nema standards publication ics 19 2002 industrial control and systems.

Nema publishes more than 700 electrical and medical imaging standards and technical whitepapers that cover millions of member products. I don t think the symbol changes just a notation next to the symbol stating the trip level. Electrical schematic nema iec electrical symbols comparison. Since the electrical standards adopted by various nations may vary the markings and symbols used.