The values stated in the table apply for 3 and 4 pole fixed mounted devices with an equal load distribution.
On 4 pole devices the current in the N-conductor is equal to zero.
The total resistive load is the measured value for a 3 pole or a 4 pole switch.
The total heat dissipation is the value measured at In, 50/60Hz for a 3 pole or 4 pole switch.
The heat dissipation can be calculated with the formula: P = 3 × R × I²