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Grounding and lightning protection requirements
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In a TT earthing system, the protective earth connection of the consumer is provided
by a local connection to earth, independent of any earth connection at the generator.
Important! Where uncertainty exists around the reliability and/or effectiveness of the
main grounding system contact Alcatel-Lucent Technical Support or the appropriate
electrical inspection authority.
In addition the following document can also be used as a general reference for
installation site grounding requirements, Grounding and Lightning Protection
Guidelines for Wireless System Cell Sites, 401-200-115.
Surge protection requirements
Having a good ground alone is not enough to minimize damage due to energy surges.
Commercial power and data facilities are susceptible to lightning surges, switching
transients of power and switching of circuit breakers in the power system under fault
conditions. Therefore power and data facilities must be also be properly protected.
A surge protection device capable of discharging the surge waveforms as defined in IEEE
C62.41 (1991), Recommended Practice on Surge Voltage in Low-Voltage AC Power
Circuits, for Location Category "C3" and "High System Exposure" must be installed in
the power panel board or load center supplying power to the installation site and must be
connected directly to the grounding electrode system. The power panel board or load
center, circuit breakers and surge protector are not supplied with the product. They must
be ordered and installed as part of site preparation by the customer.
It is also strongly recommended that surge protection devices are installed on electrical
data facilities cabling in order to protect against electrical surges that may potentially
cause damage to equipment and the cables if they were not adequately protected.
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Alcatel-Lucent 9764 MCO
3MN-01702-0001-RJZZA
Issue 5 June 2014
Alcatel-Lucent – Proprietary
Use pursuant to applicable agreements
Grounding and lightning protection
4-3
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