The survey found that the occurrence of the group system, installed by the electrical systems of amino acids, Brown is critical system. In the matter of security, which may be damaged if there is not damage to life and property. Therefore, make sure that the system is working properly, which is at the core of the electrical equipment required for enterprise wan system domain to electrical ground such as a capacitor, Transformer, RMU, MDB, DB, bank, generator busduct, load center device, main electrical needs famen stability there needs to be checks and care.Spinal device from damage. To check the electrical system requires the use of specialized tools and equipment, and the expertise of the technicians who install, directly trained and trained to investigate and fix. Because there is a high risk of electric main domain. There needs to be a system ground the electric grounding to reduce the risk of leakage electricity. Electric shock protection and various equipment
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