Max Zs for TT
complete
D
Dave
Max Zs in Part 11 uses Table 41.3 to automatically populate the cell regardless of what type of earthing system has been selected. Could it instead take into account whether a TN or TT system has been selected so it can adjust Max Zs values as necessary?
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M
Michael Adrian
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complete
M
Michael Adrian
This should now be implemented. Once you select the earthing systems for the installation in step 3 under System Configuration & Earthing, it will calculate the Max Zs values based on the TN/TT system selected. For TN systems, it will use the table 41.3 values, and for TT systems, it will use the table 41.5 values that will populate the Max Zs values based on the RCD IΔn (mA) added.
Everything was tested this morning and deployed successfully.
Enjoy, and thanks for submitting this!
M
Michael Adrian
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in progress