Water Spurting from the cable ends via capillary action from the ground water.
The earthing cable is embedded in the structural column.
Normative lightning and surge protection requirements
Design and Application Standards：
IEC 62305:2010 (Part 1/2/3/4 )
IEC 60364 (Part 1/4/5)
Requirements & Testing Standards：
IEC 62561:2012 (Part 1/2/3/4/5/6/7)
IEC 61643:2011 (Part 11/21)
Lightning protection standard
Connection between the various parts of IEC 62305
Class of Lightning protection system (LPS) based on IEC 62305-1.
The discrepancy between latest IEC standards and UK standards
BS EN 62305 = IEC 62305
BS EN 50164 = IEC 62561
to supersede the previous standard, BS 6651:1999
The UK lightning protection standard which was Hong Kong followed, BS 6651 has been withdrawn in August 2008, and now BS EN/IEC 62305 is the recognized standard for lightning protection.
Above information extract from seminar given by
Tero Du 杜天良
DEHN + SÖHNE
DEHN SURGE PROTECTION
(SHANGHAI) CO., LTD
Member of the meteorology society of China
Seminar made possible by Society Of Operations Engineers (Macau Region)