Electrical Safety Question

1
Electrical Safety Question
Start with a heating mantle such as any of these
examples.
Start with a resistive heat mantle such asany of
the examples shown
Start with a
2
1) Connect the heating mantle to a power
controller such as any of these.2) Connect the
power controller to a wall socket by way of a two
conductor cable or plug adapter.
3
Questions

• 1) Is there an electrical hazard inherent in
  this experimental setup?
• 2) What is the nature of the hazard if present?
• 3) How would the presence of any electrical
  hazard be determined?
• 4) How would a hypothetical electrical hazard be
  eliminated?

4
Clue A Variac is an Auto Transformer
Auto Transformer
5
Clue - A Coupling Transformer provides full AC
isolationbetween its primary and secondary
windings
Isolation Transformer