S
simtrinity
Hi all,
I am a female technician at uni with no electrical background knowledge. I just did a two day PAT testing course and the exam is next week. There's a sample question that I do not quite understand, so if any of you could help me out it would be appreciated.
The question is:
Q: An electric shock through failure of basic protection (direct contact) occurs when a person touches
A) the metal casing of a Class I appliance made live by a fault
B) the earth terminal of an appliance in operation
C) the phase terminal of an appliance in operation, which has its outer covers removed
D) an exposed-conductive-part made live by a fault
I have the answers and I know that the correct answer is C. But initially I went for A, as the casing is live. But I guess if everything is earthed correctly then I won't get an electric shock. Is that right?
And I figured the same applies to Answer D.
Does 'earth terminal' refer to the earth pin in the plug? Either way, I figure that since the earth terminal has an electric potential of zero, I would not be able to get an electric shock. Correct?
So if C is the correct answer, where is the phase terminal? Inside the appliance or does it refer to the phase pin in the plug top? Probably sounds silly but I am confused. Does touching the phase terminal bypass the protective earthing and that's why I would get en electric shock?
Thanks a lot for your help!
simtrinity
I am a female technician at uni with no electrical background knowledge. I just did a two day PAT testing course and the exam is next week. There's a sample question that I do not quite understand, so if any of you could help me out it would be appreciated.
The question is:
Q: An electric shock through failure of basic protection (direct contact) occurs when a person touches
A) the metal casing of a Class I appliance made live by a fault
B) the earth terminal of an appliance in operation
C) the phase terminal of an appliance in operation, which has its outer covers removed
D) an exposed-conductive-part made live by a fault
I have the answers and I know that the correct answer is C. But initially I went for A, as the casing is live. But I guess if everything is earthed correctly then I won't get an electric shock. Is that right?
And I figured the same applies to Answer D.
Does 'earth terminal' refer to the earth pin in the plug? Either way, I figure that since the earth terminal has an electric potential of zero, I would not be able to get an electric shock. Correct?
So if C is the correct answer, where is the phase terminal? Inside the appliance or does it refer to the phase pin in the plug top? Probably sounds silly but I am confused. Does touching the phase terminal bypass the protective earthing and that's why I would get en electric shock?
Thanks a lot for your help!
simtrinity