Creepage distances and clearances s

Creepage distances and clearances shall not be less than the values in millimetres shown in Table K.1. The clearances specified do not apply to the air gap between the contacts of thermal controls, overload protection devices, switches of micro-gap construction, and the like, or to the air gap between the current-carrying members of such devices where the clearances vary with the movement of the contacts. Creepage distances and clearances also do not apply to the construction of battery cells or the interconnections between cells in a battery pack. The values specified in Table K.1 do not apply to cross-over points of motor windings.The values in Table K1 are equal or larger than the values required by IEC 60664-1, when– an overvoltage category II;– a material group III;– a pollution degree 1 for parts protected against deposition of dirt and for lacquered or enamelled windings;– a pollution degree 3 for other parts;– inhomogeneous electric fieldare applied.For parts of different polarity, clearance and creepage distances less than those given in Table K.1 are acceptable if the shorting of the two parts does not result in the tool starting.NOTE 1 The risk of fire due to spacings below the required values is covered by the requirements of 18.1.Table K.1 – Minimum creepage distances and clearances between parts of opposite polarityFor parts having a hazardous voltage between them, the sum total of the measured distances between each of these parts and their nearest accessible surface shall not be less than 1,5 mm clearance and 2,0 mm creepage distance.NOTE 2 Figure K.1 provides clarification on the measurement method.Compliance is checked by measurement.