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That's exactly right, many people incorrectly assume this is just for TT systems.
Discuss Zs values? in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net
even so, still put in the measured Zs in it's column, but max. as 1667.
That's exactly right, many people incorrectly assume this is just for TT systems.
1667 is for TT systems.
On a TNS system the mcb or rcbo is your method of complying with 411.3.2.2 & you use table 41.3
The rcd is for additional protection so 1667 does not come into it.
Table 41.5 is for TT systems.
Reply to Zs values? in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net
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