Hi,
Up until now, the vast majority of my work has been with microcontrollers and low voltage DC circuits. I've recently started working with AC quite a bit more and have a couple of questions that I've been trying to work out in my head but I'm stuck. I was hoping someone could help get me pointed in the right direction.
1) In a 240V/120V residential application, I understand the neutral wire is connected to the ground bar in the load center which is then connected to the ground rod that is buried in the ground outside your house. I also understand the neutral coming off of the step down transformer and into the house is grounded at/near the power pole. My question is, if the neutral somehow loses it's connection to the ground rod outside the house, will you be able to be shocked by the neutral since it is no longer connected to earth? Or does the ground at the transformer keep it connected to earth? If you also somehow lost the ground connection at the power pole, could you be shocked by the neutral in that case?
2) My second question is somewhat related to the first. How is it possible for the neutral to be connected to the earth without major problems? Since the voltage between the neutral and one of the hot leads (black or red) is varying 120V AC, the "polarity" of the source is switching each half cycle. In the negative half cycle, can the neutral be considered a "hot" lead (due to polarity switch) and if so, how does connecting it to ground in that case not cause a ground fault?
Thank you
Up until now, the vast majority of my work has been with microcontrollers and low voltage DC circuits. I've recently started working with AC quite a bit more and have a couple of questions that I've been trying to work out in my head but I'm stuck. I was hoping someone could help get me pointed in the right direction.
1) In a 240V/120V residential application, I understand the neutral wire is connected to the ground bar in the load center which is then connected to the ground rod that is buried in the ground outside your house. I also understand the neutral coming off of the step down transformer and into the house is grounded at/near the power pole. My question is, if the neutral somehow loses it's connection to the ground rod outside the house, will you be able to be shocked by the neutral since it is no longer connected to earth? Or does the ground at the transformer keep it connected to earth? If you also somehow lost the ground connection at the power pole, could you be shocked by the neutral in that case?
2) My second question is somewhat related to the first. How is it possible for the neutral to be connected to the earth without major problems? Since the voltage between the neutral and one of the hot leads (black or red) is varying 120V AC, the "polarity" of the source is switching each half cycle. In the negative half cycle, can the neutral be considered a "hot" lead (due to polarity switch) and if so, how does connecting it to ground in that case not cause a ground fault?
Thank you