Commonly used electrician meters

In addition to understanding and memorizing the basic formulas, electricians also need to be able to use relevant calculation tables. For example, commonly used physical quantities and their units, commonly used legal measurement units and conversions, commonly used physical constants, and prefixes used to form decimal multiples and fractional units.
A calculation table is a simple calculation tool that is easy to master and convenient to use. For example, this chapter introduces the "distribution network cosg value quick calculation table, cosg and tgT corresponding value table". This chapter also introduces some commonly used and professional "electricity relationship, equivalent interchange" and other calculation tables. Familiarity with these calculation tables can reduce calculation time, memorize calculation formulas, and improve work efficiency.
2-1 Prefixes used to form decimal multiples and fractional units

104 is called ten thousand, 108 is called one hundred million, and 1012 is called one trillion. The use of these numerals is not affected by the prefixes, but they should not be confused with them.