How large is the flat steel used for equipotential grounding?
According to the GB 50054-2011 3.2.15 6# responses (table 3.2.15), the distribution system of equipotential bonding conductor may be 25mm2 copper; when the 1/2PE line section of not less than the case, must use 25mm2 copper (or the equivalent capacity of aluminum or steel); according to the GB 50057-2010 5.1.2 (table 5.1.2), lightning protection system equipotential bonding conductors with 16mm2 copper, can meet the minimum section of all the connecting parts of the requirements of lightning protection device. Therefore, "lightning protection system equipotential" equipotential bonding conductor specification is greater than "distribution system equipotential" equipotential connection conductor is not necessarily established.
To divide 2 kinds of equipotential, one is the equipotential of the distribution system, and the other is the equipotential of the lightning protection system; two. The latter specification is greater than the former
3.2.15 general equipotential connection with the sectional area of protective bonding conductors, shall not be less than the maximum protection of conductor size distribution line 1/2, protective bonding conductor cross-sectional area of the minimum and maximum value shall comply with the provisions of table 3.2.15.
