Clearances distances
Shortest distance in the air between two live conductors or between live
Conductors and exposed conductive parts.
14 mm for 12 kV impulse voltage
8 mm for 8 kV impulse voltage
5.5 mm for 6 kV impulse voltage
The IEC 60439-1 and IEC 61439-2 standards stipulate the minimum clearances
Required to withstand impulse voltage up to 2000 m above sea level.
Pollution degree 3.
Creepage distances
Shortest distance along an insulated material surface between two live
Conductors or between live conductors and exposed conductive parts.
16 mm for rated insulation voltage 1000 V AC and DC
12.5 mm for rated insulation voltage 750 V AC and DC
8 mm for rated insulation voltage 500 V AC and DC
See IEC 60439-1 and IEC 61439-2 table 16.
Pollution degree 3,
Material group 3a.
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