Editing Preferred number (section)

==E series==
{{Main|E series of preferred numbers}}
[[File:E12 values graph.png|thumb|right|Graph of two decades of E12 series resistor values, which gives resistor values from 1 to 82 [[Ohm|ohms]] (Ω)]]

The E series is another system of preferred numbers. It consists of the [[E1 series (preferred numbers)|E1]], [[E3 series (preferred numbers)|E3]], [[E6 series (preferred numbers)|E6]], [[E12 series (preferred numbers)|E12]], [[E24 series (preferred numbers)|E24]], [[E48 series (preferred numbers)|E48]], [[E96 series (preferred numbers)|E96]] and [[E192 series (preferred numbers)|E192 series]]. Based on some of the existing manufacturing conventions, the [[International Electrotechnical Commission]] (IEC) began work on a new international standard in 1948.<ref name="IEC_60063_1952"/> The first version of this [[IEC&nbsp;63]] (renamed into [[IEC&nbsp;60063]] in 2007) was released in 1952.<ref name="IEC_60063_1952"/>

It works similarly to the Renard series, except that it subdivides the interval from 1 to 10 into 3, 6, 12, 24, 48, 96 or 192 steps. These subdivisions ensure that when some arbitrary value is replaced with the nearest preferred number, the maximum relative error will be on the order of 40%, 20%, 10%, 5%, etc.

Use of the E series is mostly restricted to [[electronics|electronic parts]] like resistors, capacitors, inductors and Zener diodes. Commonly produced dimensions for other types of electrical components are either chosen from the Renard series instead or are defined in relevant product standards (for example [[IEC 60228|wires]]).