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close this bookProtective Measures against Hazardous Contact Voltage - Course: Basic skills and knowledge of electrical engineering. Instruction examples for practical vocational training (Institut für Berufliche Entwicklung, 15 p.)
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View the documentIntroduction
View the documentInstruction Example 4.1. Preparation of a Potential Equalitation
View the documentInstruction Example 4.2. Testing of the Protective Measure of ''Protective Insulation''
View the documentInstruction Example 4.3. Testing of the Protective Measure of ''Protective Conductor System''

Instruction Example 4.1. Preparation of a Potential Equalitation


Potential equalization bar,
Pipe clips of the required size,
Potential equalization lines of the required lengths and cross section

Working tools

Screw driver, wrench, round-nose-pliers, wire brush, cable stripper, soldering iron or blow lamp for soldering

Measuring and testing tools

.Folding rule

Auxiliary means

Cable fixing clips, cable eyes, flux, tin-base solder, flameproofing tape, insulating tubing or winding tape, anti-corrosive grease

Required basic knowledge

Knowledge of the necessity of potential equalization, measuring, application of pipe clips, working at, fixing and connecting of lines

Sequence of operations


1. Finding out which parts, building constructions and plants have to be included in the potential equalization

All conductive parts, such as pipe systems, heating systems, metal jackets, other metal constructions etc.

2. Application of the potential equalization bar

3. Determining the path of the potential equalization lines

4. Application of the pipe connecting clips

Gas and water meters in pipe systems have to be bridged!

5. Application of the cable fixing clips

6. Laying the potential equalization lines

7. Connecting the potential equalization lines

8. Testing the potential equalization

Visual inspection, measuring

Preparation of a potential equalization