One of the basic prerequisites for guaranteeing safety on any residential or industrial electrical is to provide an earth electrode. If there is no earth/ground electrode, people's lives may be endangered and electrical installations and other property may be damaged. An earth/ground electrode alone, however, is not enough to guarantee total safety. Only regular inspections can prove that the electrical installation is operating correctly. There are many earth resistance measurement methods available,.
197600
339800
709300
800200