Dimensions
The Class I and II plugs' shapes are similar to the Europlug; their front profile is also a flat hexagon, but it is slightly thicker. Both plugs are 35.5 mm wide. The 3-pin Class I plug is 17 mm high, whereas the 2-pin Class II plug is with only 14 mm slightly slimmer (the Europlug is only 0.3 mm smaller). The parallel side faces are 26 mm apart, and the two pairs of side faces are orthogonal to each other. As on the Schuko plug, the live and neutral pin have 19 mm center distance and 19 mm length. However, their diameter is 4.5mm, unlike the Schuko and the Class I-lookalike Brazilian 20-ampere NBR 14136 plug, which both have 4.8mm pin diameter, while the 10A Brazilian plug has a diameter of 4mm. A further distinction with the Schuko plug is the insulating sleeve around the base of the live and neutral pin (as on the Europlug). The 3-pin version also has a round protective-earth pin. It has the same length and diameter as the live and neutral pins, but lacks an insulating sleeve. The protective-earth pin's center is offset 3 mm from the center point between the live and neutral pin.
Read more about this topic: IEC 60906-1
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