Discuss The maximum value for Zs on a TT system is 50/I delta. So for a 30mA RCd is 1667 ohms in the Periodic Inspection Reporting & Certification area at ElectriciansForums.net
agreed, but with a TT system, due to the higher value of Ze, we rely on the RCD for fault protection as well as.RCD's are additional protection.
agreed, but with a TT system, due to the higher value of Ze, we rely on the RCD for fault protection as well as.
strange that before the advent of RCDs, when the main earth was from the incoming lead water supply, we had Ze values way below what was achievable with a rod. now this is banned.?????
Only upto 30mA.RCD's are additional protection.
Reply to The maximum value for Zs on a TT system is 50/I delta. So for a 30mA RCd is 1667 ohms in the Periodic Inspection Reporting & Certification area at ElectriciansForums.net
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