Changes for the 18th Edition - Disconnection times for distribution circuits in a TN system

Hi,

With reference to the post in  "Changes for the 18th Edition", what is the reason for considering 1 Sec (see snap below) disconnection time for Other circutis in TN system.

As per BS 7671:2018 Regulation 411.3.2.3 - In a TN system, a disconnection time not exceeding 5 s is permitted for a distribution circuit and for a circuit not covered by Regulation 411.3.2.2.

So is this supposed to be 5 Sec as per the BS 7671?

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