For reduction of influence of external hindrances by the equipment connected to network of power supply, reduction of electromagnetic radiation and also for exception of defeat of the person the capacity current uses grounding. But, alas, grounding is not everywhere. To be sure what at inclusion in the socket of electric equipment will not knock you current, surely check grounding availability.
It is required to you
- - hammer;
- - ohmmeter.
Instruction
1. Before starting grounding verification, pay attention here to such fact: there are planimetric and portable dividers. Their differentiation is defined by the location of the ground wire on the relations to the building. Electrodes of portable ground wires are located out of the building, planimetric are evenly placed on building contour. All grounding conductors being out of the building are laid in the earth. The same which are located in the building pass on the walls (as a rule, they are laid at the height of 25 centimeters over floor height).
2. Carry out visual examination of connections between ground wires and grounding devices. After that legonechko tap the hammer of the place of connections and attentively examine whether there are no gaps. Then by means of ohmmeter measure transition resistance (resistance rate at working order of grounding is 0.05 Ohms).
3. Figurative grounding are provided by the clips intended for accession to the grounded devices. However certain requirements are imposed to such grounding: the design of clips and feature connectors has to be reliably executed, that is, is bolted or welded. Besides, each grounding has to have special label with the indication of the registration number and area of cut of ground wire. Perform inspection of figurative grounding for the purpose of definition whether there corresponds the ground wire to this characteristic.