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Electrical Installation Earthing

Ishan
What are the factors need to be considered when converting an existing TT earthing system to a TN-S earthing system?
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  • Former Community Member
    0 Former Community Member
    Depends on the location it's installed and the type of installation - is it domestic/commercial/industrial/on-street? Has it been confirmed with the DNO that it's definitely a TN-S system and doesn't convert to a PME at any point back to the origin? If it's all confirmed to be 100% good, it's generally fine to connect onto the DNO earth and continue the installation as normal and keeping in line with 7671 regs et al.


    You can always ask the DNO if you're unsure.
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  • Former Community Member
    0 Former Community Member
    Depends on the location it's installed and the type of installation - is it domestic/commercial/industrial/on-street? Has it been confirmed with the DNO that it's definitely a TN-S system and doesn't convert to a PME at any point back to the origin? If it's all confirmed to be 100% good, it's generally fine to connect onto the DNO earth and continue the installation as normal and keeping in line with 7671 regs et al.


    You can always ask the DNO if you're unsure.
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