There are cases in which equipment connected by a plug or cord do ...

[armygirl]

There are cases in which equipment connected by a plug or cord do not have to be grounded. What are these exceptions?
 
  What will be an ideal response?

Question 2

List four of the major sources of electrical hazards in the workplace.
 
  What will be an ideal response?

[ju]

Answer to Question 1

There are cases in which equipment connected by a plug or cord do not have to be grounded. These exceptions are as follows: 1) when they receive power through an isolating transformer that has an ungrounded secondary of 50 volts or less, and 2) properly labeled portable tools equipped with a system of double insulation.

Answer to Question 2

The major causes of electrical shock are as follows:
 Contact with bare wire carrying current. The bare wire may have deteriorated insulation or be normally bare.
 Working with electrical equipment that lacks the UL label for safety inspection.
 Electrical equipment that has not been properly grounded. Failure of the equipment can lead to short circuits.
 Working with electrical equipment on damp floors or other sources of wetness.
 Static electricity discharge.
 Using metal ladders to work on electrical equipment. These ladders can provide a direct line from the power source to the ground, again causing a shock.
 Working on electrical equipment without ensuring that the power has been shut off.
 Lightning strikes

[armygirl]

Excellent

[bdobbins]

Gracias!