In a TT system in commercial premises with 100mA main switch , does all circuits need to be 30mA rcd protected... Can't think of the sums for this 1. But I will say yes.
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In a TT system in commercial premises with 100mA main switch , does all circuits need to be 30mA rcd protected... Can't think of the sums for this 1. But I will say yes.
In a TT system in commercial premises with 100mA main switch , does all circuits need to be 30mA rcd protected... Can't think of the sums for this 1. But I will say yes.
generally, with a TT earthing system, you are relying on RCD/s to provide fault protection as the high value of Ze prevents OCPDs operating within specified times. on commercial, a 100mA RCD may be sufficient, but with domestics, 30mA is stipulated.
Ok thanks completely understand I didn't need to ask this question but I did lol so let's take a 6A lighting circuit on 100mA rcd main switch . If there's a fault it will trip but will it trip before reaches 50v.. I do t even know what I'm asking now. What's the formulae is it uo/Ian i
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