MODULE V
Electrical engineering - Basics Page 41

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6.4 Exercises

  1. What are the voltage and amperage limits human beings can be exposed to for a short period of time according to international safety regulations ?

  2. Briefly explain the four possible dangerous effects if these limits are exceeded.

  3. Explain the safety measures against dangerous contact.

  4. Explain the safety measures against dangerous body currents.

  5. Explain the safety measures against overload and short-circuit.

  6. Name and explain the area divisions for the installation of electric devices and conductors in damp and wet areas and rooms (e.g. bath rooms, shower rooms, etc...).

  7. Electric devices and conductors have special identification marks that indicate where they can be installed. Explain what has to be considered if one wants to e.g. install an instantaneous water heater in the area B1 of a bath room.

  8. Explain the following international area protection specifications: IP 34; IP X7; IP 68


 

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