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Table 41.1 Assumed Touch Voltage

Former Community Member
Former Community Member
I am a bit confused by this. Why do the disconnection times in Table 41.1 appear to be based on a touch voltage of 100 volts rather than a touch voltage of 125 volts?


For example, 110% of 230=  253 volts. Assuming L and PE are of the same size and material, indirect contact touch voltage is 126.5 volts. Would 0.33 seconds not appear more realistic?  


From IEC 61200-413


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Parents
  • 0
    and 2 s where TN systems have disconnection times of 5 s

    Where does 2s come from? (my copy of BS 7671 seems to say 1s for TT circuits not covered by table 41.1).

       - Andy.
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  • 0
    and 2 s where TN systems have disconnection times of 5 s

    Where does 2s come from? (my copy of BS 7671 seems to say 1s for TT circuits not covered by table 41.1).

       - Andy.
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