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The maximum permissible disconnection time is 0.4 s in TN system. Why and from where this value (0.4 s) is obtained?
Former Community Member
The maximum permissible disconnection time in in the event of a short circuit between a phase conductor and a body or protective conductor or a protective-neutral conductor is 0.4 s in TN system. Does anybody know this value (0.4 s) obtains from where? How this value is obtained?
. . . I do not know if there is any written requirement to lay rubber matting in front of LV panels . . .
It used to be a requirement of the Factories Act. Not sure if it is still in there. Out of curiosity, would anyone trust a piece of rubber matting that had probably not moved since the switchboard was installed?
. . . I do not know if there is any written requirement to lay rubber matting in front of LV panels . . .
It used to be a requirement of the Factories Act. Not sure if it is still in there. Out of curiosity, would anyone trust a piece of rubber matting that had probably not moved since the switchboard was installed?
