Why since 2002, I generally do not recommend that you use neutral grounding during installation? A: 1) a new generation of self-regulatory function generator greatly enhanced; 2) the practice found that the high failure rate of lightning neutral grounding of the unit. 3) Grounding high quality requirements, the average user can not do. Unsafe working ground rather not grounded. 4) neutral grounding of the unit will cover the load leakage failure and ground fault, the original DSE7320, and these failures and errors can not be exposed to the city TV current supply situation. How to identify fake and shoddy domestic diesel? A: First check whether the factory certification and product certification, DSE7320, they are diesel engine factory "identification", the controller DSE7320, is a must have. Then check the certificate on the three number 1) plate number; 2) the serial number (the kind usually in the flywheel mechanical cutting off the plane, convex body font); 3) the pump nameplate number. Check this actual number three on the number of diesel engine, must be accurate. If there are doubts can verify these three numbered newspaper factory. Original DSE7320, deep sea (certified), DSE7320 provided by the Dongguan City, South City Zhongxin Electrical and Mechanical operation. Dongguan Nancheng Zhongxin Electrical and operating (zhongxin888.net.cn) Dongguan, Guangdong, industrial products leader, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Zhongxin Electrical and Mechanical leadership with the staff warmly welcome all inquiries negotiations to create a better future for electromechanical faithful.