K.26 Provision for earthing
This clause is not applicable.
K.27 Screws and connections
K.27.1 This clause of the standard is applicable except as follows: Paragraph 6 and the accompanying
note, which refers to earthing conductors, is not applicable.
K.28 Creepage distances, clearances and distances through insulation
K.28.1 Creepage distances and clearances shall not be less than the values in millimetres shown in Table
K.2. 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. Creepages 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.2 do not apply to
cross-over points of motor windings.
For 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.
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