2.2. Preparation of the Teaching Aids
For theoretical instruction, the trainees should have a writing
place. Recommendable is a room equipped with blackboard, desks and electric
If instruction takes place in the workshop or at the workshop
place, clean pads should be put on the working tables for the trainees to put
their papers on and take notes.
For demonstration purposes, a working place with the following
equipment should be prepared:
On the necessity of taking protective measures:
Devices and parts of plants showing
- natural ageing
- destruction due to inexpert
- premature ageing caused by the influence of moisture, chemical gas,
Illustrations showing people who had accidents caused by lacking
or not functioning protective measures.
On potential equalization:
Here, the thing to do would be on the spot to show plants and
parts of plants which require the measure of potential equalization or where
potential equalization has already been created.
On the individual protective measures:
- Visual aids from which the mode of functioning can
- Equipment and accessories required to put the individual
protective measures into practice.
- Also here, it would be convenient to
show the respective plants on the spot.
The "Trainees' Handbook of Lessons" - protective measures
against hazardous contact voltage has to be destributed according to the number
Tables and switching diagrams are drawn on the blackboard before