Neutral Wires: Potential and Safety

AI Thread Summary
The neutral wire is typically at ground potential, but this can vary depending on the grounding point and the current flowing through it. Touching a neutral wire is not safe, as it may carry a return current that could create a potential difference. The grounding point may not align with the potential at the point of contact, posing a risk of electric shock. In AC circuits, understanding the positive and negative aspects is essential for proper analysis, especially if a DC offset is present. Therefore, caution is advised when dealing with neutral wires in electrical systems.
v_gurucharan
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Is neutral wire at 0 potential??
Does that mean we can easily touch it??
 
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Take a read through the following threads:

Neutral Wire:
https://www.physicsforums.com/showthread.php?t=221836

Simple Electrical Question:
https://www.physicsforums.com/showthread.php?t=251095

Neutral wire is usually at ground potential, but since the point at which your system is grounded (earthed) might have a different potential from the point at which you're standing, and since the neutral wire may be carrying a large return current (which means the point at which you're touching the wire may not be at Earth potential), you should refrain from needlessly touching the ground wire.

And yes, when analyzing AC circuits the + and - help facilitate your analysis. Unless there's a DC offset somewhere.
 

Thread '3-terminal device external modeling'

Very basic question. Consider a 3-terminal device with terminals say A,B,C. Kirchhoff Current Law (KCL) and Kirchhoff Voltage Law (KVL) establish two relationships between the 3 currents entering the terminals and the 3 terminal's voltage pairs respectively. So we have 2 equations in 6 unknowns. To proceed further we need two more (independent) equations in order to solve the circuit the 3-terminal device is connected to (basically one treats such a device as an unbalanced two-port...
View full post »

Thread 'Two capacitors, etc.'

suppose you have two capacitors with a 0.1 Farad value and 12 VDC rating. label these as A and B. label the terminals of each as 1 and 2. you also have a voltmeter with a 40 volt linear range for DC. you also have a 9 volt DC power supply fed by mains. you charge each capacitor to 9 volts with terminal 1 being - (negative) and terminal 2 being + (positive). you connect the voltmeter to terminal A2 and to terminal B1. does it read any voltage? can - of one capacitor discharge + of the...
View full post »

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