Articles, Publications, Guides, The Missing Link
View and download our articles, publications & guides
These documents provide information about electrical safety, technical and reliability requirements of codes and standards
THE MISSING LINK
THE MISSING LINK (No.1):
National regulations and standards advocate TN-C-S system with PME for public electricity distribution. However in practice, a sort of TT system is used in more than 80% of the consumer premises, but with the earthed neutral conductor in distribution, which is an unestablished electrical network. (i.e., a TN-C-S network with PME, but with a missing link between N and PE at consumer installation).
THE MISSING LINK (No.2):
Protective equipotential bonding is a recognized mandatory fault protective measure. This is achieved by linking MET and extraneous conductive parts (such as metal pipes, ducting, etc). The rules for making this mandatory protective measure is explicitly explained in IS standards. However, it is missing in 90% installation. Unawareness within the engineering community about this mandatory protective measure is shocking.
THE MISSING LINK (No.3):
TN-S systems are supposed to be used in industrial and commercial installations following the rules in IS standards. However, regulations are generally misinterpreted, Neutral of the transformer (and DG) are earthed separately in soil (resembles a TT) and is called as TN-S. Here the link between exposed conductive parts at the installation and earthed terminal of the source is missing. Earth fault loop impedance will be high due to this missing link, resulting in non-disconnection of supply during fault and an accident.
These MISSING LINKS and lack of "misinterpreted associated knowledge" are the main reason for electrical accidents. In the first missing link, a few centimeter of wire is required, while in the second few meters of wire are required and in the third missing link, few 10’s of meters of wire are required. Hence, we name this guide as THE MISSING LINK
THE MISSING LINK
explains the necessary improvements in a Low Voltage electrical installation to ensure safety and reliability. This technical handbook has already become a reference in electrical safety discussions. Due to the preparation of second edition of THE MISSING LINK, only printed copies are available. The book is available at free of cost. Write to us with your official address to get a free copy of the book.
Few articles published during 2020 and 2021 are only available in this web page. More information can be found on