Dear Raghu,
Thank you for uploading this pdf book. This is ok as it does not infringe copyright; I found the following statement at the end of the book.
"This publication may be freely reproduced, except for advertising, endorsement or sales purposes."
Dear Raghuvaran Chakaravarthy,
This will be very useful for electricians and their supervisors.
In most places reference has been made to the BRITISH STANDARDS.
It would be advisable for users to follow the relevant standard in their own country.
However in principle all the descriptive matter will be common in all standards and hence useful as such.
V.Raghunathan
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