Grounding of lightning protection and electrical installations. Scheme, description

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Lightning protection. Grounding of lightning protection and electrical installations

Encyclopedia of radio electronics and electrical engineering / Lightning protection

Grounding, in all possible cases, is carried out in the form of a closed ring contour around the perimeter of the building at a depth of 0,5 meters. Performance material - galvanized steel (hot galvanizing method). All connections in the ground are made using special fasteners made of galvanized steel and insulated with an anti-corrosion bandage.

This grounding provides a number of advantages.:

a closed circuit at a depth of 0,5 meters significantly reduces the risk of injury to a person as a result of the occurrence of step voltage.
lightning protection down conductors, lowered to a common circuit, have the same grounding resistance, which ensures uniform division of the lightning current between the down conductors.
a large number of conductors in the ground provides a low ground resistance, which, in addition to the obvious advantages for the successful operation of the lightning protection system, allows, in most cases, to use the circuit for re-grounding the electrical installation.
the implementation of the contour of anti-corrosion materials using non-welded insulated joints ensures the durability of such an important system for the safety of the house as grounding.

Grounding can be made of copper or stainless steel. Also, the system can be equipped with grounded inputs or inspection hatches for instrumental examination of the grounding condition.

Author: Koryakin-Chernyak S.L.

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