Calculation of Touch Voltage
Calculation of the Touch Voltage Limit ΤΤ Earthing System, with RCD: ΤΤ Earthing System, without RCD: ΤN Earthing Systems: With: And with:

Verification of the Touch Voltage Limit The software, in accordance with regulation 411.5.3, verifies that the touch voltage does not surpass the allowable limit: Where:
Note:
Note: The value of ZA is verified that is less than 200 Ω, as recommended in the ON SITE GUIDE, Section 10.3.5. 