What's the difference between NEMA & IEC?

Fun Fact: In 1930, the IEC developed the following international standard units of measurement, also known as the “Giorgi System,” or “Système international“; “SI” for short:

• Hertz (Hz): the unit of frequency
• Ørsted (Ø): the unit of magnetic field strength
• Gauss (G or Gs): the unit of magnetic flux density
• Maxwell (Φ): the unit of magnetic flux
• Gilbert (Gb): the unit of magnetomotive force
• Var (VAr): the unit of reactive power
• Weber (Wb): the practical unit of magnetic flux

In 1930, the IEC developed the following international standard units of measurement, also known as the “,” or ““; “for short:

We have Lord William Thomson of Kelvin (Kelvin referring to the River Kelvin which flowed near Thomson’s laboratory) to thank for the study and standardization of electrical units, “‘when you can measure what you are speaking about, and express it in numbers, you know something about it.”