Questions tagged [grounding]
Problems related to the connection of circuits to ground or earth references. Can affect safety, accuracy, reliability and interfacing.
1,326 questions
2 votes
1 answer
241 views
What is the correct way to deal with circular PCB ground planes
Let's say I have a 2 later circular PCB with some components on it. Nothing high speed. I want to have ground plane on it with proper stitching. In proposition A, there is a continuous ground plane on ...
-2 votes
0 answers
41 views
3-phase TT system with generator [closed]
It is a simple concept TT system (each phase is 240 V). Please mention any mistakes/problems in this system. I talked to some local electrician and they said it's ok.
- 31
-3 votes
2 answers
92 views
Should I use a ground rod at the generator? [closed]
Should I use ground rod at generator or not? My transfer switch also cut off neutral from mains. Lightning almost never occurs in my area. My main concern is electric shock protection from appliances.
- 31
4 votes
3 answers
983 views
What is the need of foundation rebar earthing?
What is the need of equipment foundation earthing in the substations? This is not a usual requirement which all our customers are looking for. It's a unique requirement from some of our customers, so ...
- 41
0 votes
2 answers
128 views
How do I connect a power supply to this 4" CRT TV screen?
I have this adorable little 4" CRT TV screen, like this... I am trying to work out how to connect up the power supply. The circuit diagram... ...says that three of these four pins... ...are ...
1 vote
3 answers
251 views
How to connect Mounting Holes in a PCB? I'll expose my case
We are implementing an aeronautical system that's powered with a 28 VDC source and consumes around 20 W. There is an FPGA and many communication interfaces, such as CAN or RS485. We are a bit confused ...
- 71
0 votes
1 answer
102 views
How can I reduce noise and improve femtoampere sensitivity with the SR865A lock-in amplifier?
I'm measuring (or at least trying to) low-level currents using the SR865A lock-in amplifier. My sample produces a DC current modulated by a mechanical chopper at around 1 kHz, so the signal appears as ...
- 11
0 votes
1 answer
74 views
Proper Grounding in a Multi-Voltage Circuit
I need a little help understanding how I could implement star grounding (or any other type of good grounding technique) in my circuit. I want to create a project where there would be a Raspberry Pi, ...
- 13
1 vote
1 answer
67 views
Grounding loop questions
I need some help to better understand these grounds. I am not sure why these grounds are labeled separately or why would one need a zero ohm to tie in the grounds. The circuit is AC to DC. I know ...
- 11
4 votes
1 answer
233 views
Connection between frame and GND on a robotic system
I am developing a mobile robot that has a battery with a nominal voltage of 24 VDC. According to a relevant norm, there shall be no electrical connection to the frame of the robot, though there are ...
- 748
1 vote
1 answer
351 views
MOSFET driven by MCU ceases to function when powered via battery, works fine when powered via USB
I've made the following setup for the classic task of "switch high-voltage Motor on/off with a 5V mcu". The RPI acts as the motor control signal generator (hardware PWM, not via GPIO library)...
- 144
2 votes
2 answers
537 views
Does earthing health monitoring have any relevance?
I have been assigned an Earthing Health Monitoring project for my final year. Does this project really make sense in practice? In residential or small buildings, we rarely see hazards caused by bad ...
- 29
2 votes
0 answers
63 views
EMC best practices for Eth lines
I am trying to understand and pass CISPR 32 / 35 for a unit I am making, I have the general idea mostly down but I would like clarity on the best practices for attaching my ETH isolation transformer (...
- 99
23 votes
2 answers
3k views
Why did all my surge protectors smoke when my home became ungrounded?
I live in North America and the ground/neutral wire between the utility pole and my home was severed. When this occurred, all my surge protectors fried. Why would this happen?
- 351
0 votes
1 answer
76 views
Earthing Body capacitive coupling
Your body can be capacitively coupled to mains 60Hz. If you ground to earth. Can it be lessened? If yes. What is the explanation. Like perhaps the electric field in your body can be shunted to ground? ...
- 1,093