All Questions
20 questions
1
vote
1
answer
112
views
Grounding Lug Straight To Chassis
Connecting some thicker gauge cable to my trailer to ground neutral for the 12v DC system. The current 8AWG wire uses a receptacle style lug where the wires are inserted and the that receptacle is ...
- 125
0
votes
1
answer
64
views
Neutral grounding resistor
How does neutral grounding resistor in power generation side, see and link up with grounding fault at the secondary side of a transformer?
0
votes
2
answers
1k
views
Do neutral wires go back to transformer via ground?
I have heard that transformer connects to house only via phase(s) - neutral from house is actually grounded, as well as transformers and they connect via earth. Is this true? What is resistance of ...
- 1,049
0
votes
1
answer
242
views
Correct configuration for adding an earth terminal block?
I have a small motor controller test board setup like the diagram below:
A few loads such as a motor controller, and some switches are connected to the live and neutral terminal blocks for power. ...
1
vote
2
answers
105
views
Is there any way to easily gain access to "actual ground" in an IT grounding system?
As the title asks, is that possible? By "easy access" I mean through some connection I can find inside my home, rather than burying my own grounding electrode and running wires from it to ...
- 186
4
votes
2
answers
1k
views
What is the purpose of the 1 Mega-ohm 1/2 watt resistor between neutral and ground, in a vintage audio amplifier (SONY model STR-7800SD)
I own an old SONY radio / amplifier, model STR-7800SD. I opened it and I saw a resistor between one of the AC lines and the chassis. The funny thing is that it has a REVERSIBLE 2-prong plug! So, I ...
- 41
0
votes
1
answer
256
views
Is high earth to neutral voltage in single phase power supply system indication of high earth resistance?
In a single phase power supply system, if I measure the earth to neutral voltage, can I use it to indicate the health or status of the earth resistance i.e. if E-N voltage is high, is it due to earth ...
- 111
3
votes
2
answers
2k
views
Why do we connect neutral and ground at the transformer? [closed]
Why do we connect neutral to ground at the transformer, why can't we just connect that neutral to the ground at our house?
- 57
0
votes
3
answers
4k
views
What's the use of neutral wire in single phase home supply? [duplicate]
I am aware that the neurtal wire provides a return path for the current to the power source. But that neutral wire too, is connected to the ground at somewhere between the load and the source.
My ...
- 57
0
votes
1
answer
224
views
Running a long 120VAC line without a neutral
Source is a home 120/240VAC with pole transformer. I want to direct bury a 500 foot 120V line to run some battery chargers and dont need more than 10 amps. Why cant I only run a single large ...
- 11
1
vote
3
answers
2k
views
Line to ground faults
I am having a trouble understanding the concept of line to ground faults,and ground in general.
In this simple single phase circuit, does current reach the load and the circuit operates normally? ...
1
vote
2
answers
626
views
Question on ground/neutral connection for 220V equipment
I sketched the following schematic from a motor controller board that has to be operated at 220V from L1 to L2. The earth wire is connected to the chassis of the machine.
Where I live, it's common to ...
user115094
9
votes
2
answers
30k
views
Why is neutral wire connected to ground at the transformer?
I understand the use of ground wire at the home appliances but why is the neutral wire connected to ground at the transformer? Why doesn't the neutral wire go back to the power generation plants.
I ...
0
votes
2
answers
1k
views
480v delta/400v wye with Neutral ungrounded
I have a European machine using a 480/400 volt three phase transformer. The neutral conductor is used to power some devices at 230 volt. The manuf. insists that the neutral must not be solidly ...
2
votes
3
answers
669
views
Earth and neutral voltage detection
Can someone suggest me a circuit to detect the earth to neutral voltage? I would like to trip a relay coil using a microcontroller if the earth to neutral voltage exceeds 3 V.
There are RCB and RCBO ...
- 61
0
votes
1
answer
194
views
How does circuit completes when physical ground(earth) is used as neutral? [duplicate]
In my locality, there is no neutral wire. Our transmission company runs only 3 wires (all lines/phases) and no neutral (4th wire) at all. Out of three, one runs to our houses. I know it sounds ...
- 101
2
votes
1
answer
950
views
Grounding conductor has a non-zero voltage (i.e. with respect to "true" ground). Why?
We're building a new house and I'm not confident with the skills of the electrician who installed the receptacles. In our country, residential structures are supplied with 240 V, 60 Hz (single phase).
...
0
votes
3
answers
4k
views
50 Volts on the Neutral (180 Volts on the Live) bad or safe?
We have an off-grid UK home on occasion powered by a generator (MOSA GE 6000 SX/GS).
Due to the design of the generator, it has two modes: centre-tapped-earth 110 V, and 230 V. When running in 230 V ...
- 225
3
votes
4
answers
2k
views
Hot and neutral have similar voltage to ground - finding the problem
I have an APC battery backup and surge protector for my computer. It has a light, labeled "Building wiring fault." This light is on, and my computer will not start. I am unemployed and my landlord is ...
- 161
40
votes
5
answers
38k
views
Why don't we use neutral wire for to ground devices and earth wire for closing the circuit?
I know that the neutral point of a distribution transformer is connected to the grounding (earthing) wire, so I think they are the same.
Can I use the neutral wire for protecting metal-cased electric ...
- 3,854