GB 51120-2015 通信局（站）防雷与接地工程验收规范（英文版）

4.1.14 The earthing resistance or the size of earthing grid shall meet the engineering design requirements.The earthing resistance shall be tested with the method specified in Appendix A.

4.2EarthingLead

4.2EarthingLead

5 DirectStrokeProtectionSystem

布线标准6EquipotentialBonding

6EquipotentialBonding

EarthingBusbarandMainEarthingOmnibu

6.3Earthing Conductor

.1Permanent marks shall be set somewhere close to the terminal of the earthing conductor, rk shall also indicate the position of the other end. 2It is strictlyforbidden to install any switch orfuse in and between earthing conductors.

EarthingandProtectionofCables

ZlFeeder Line

earthing conductors, the metal sheathes of vertical cables or the vertical steel pipes shall be earthed to the nearest lightning strips or earthing conductors atbothends at least. 7.2.8Cables entering the equipment room from the roof and feeder cables of solar cells shall be armored cables,and their armor layers shall be welded and connected to the nearby lightning strips at the entrance.

SurgeProtectiveDevice

9 Acceptance

AppendixAMeasurementofEarthingResistance

the earthing resistance is measured with the triangle method,the circuit shall be connected in e with Figure A.0.4.The distance,di,between the current electrode and the earthing grid shall the distance,d2,between the voltage electrode and the earthinggrid,and they shall be greater 2times themaximum diagonal length of theearthinggrid.The included angle is about 30°

0.5In the measurement of earthing resistance of earthing grid,the current and voltage electroo Il be guaranteed to be earthed reliably, and the measuring instruments shall be connected w ulatedwires.Earthing resistancemeasurement shall notbemade immediately after rain

B.o.2Inspection and acceptance forms for earthing connection 1Acceptanceresult.

节能标准规范范本2Inspectionrecord

B.0.5Inspection and acceptanceforms for equipotential bonding 1Acceptanceresult

B.0.6Inspection and acceptanceforms for earthing andprotection of cables 1Acceptanceresult.

B.o.7Inspection and acceptanceforms forpower supply surgeprotective devices. 1Acceptanceresult.

防火标准规范范本B.0.8Inspection and acceptance forms for signal surge protective devices 1Acceptanceresult.

Explanation of Wording inThis Code