Questions tagged [earth]
The earth tag has no usage guidance.
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Ground loop issue with Raspberry Pi and amplifier board
I'm trying to run a Raspberry Pi with a USB audio adaptor into an external amplifier board via 3.5mm, then running out to speakers from the amp.
Right now I'm getting a lot of electronic noise coming ...
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Questions regarding TVS-diodes and grounding
I am currently working with solutions to pass the ESD-requirements for EMC. I have used TVS (ESD)-diodes in the past to good result, but never really understood exactly why they work. Sadly, this is ...
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Substation supplies with touching MSBs
On this site we have the below setup:
We have 3 x main switchboards fed via 3 x separate transformers that are existing, this existing MSB has a connecting earth bar only and no neutral connecting bar ...
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Are common mode chokes really needed for Conducted Emission standards when there are only two terminals?
Common mode chokes make sense for power inputs when there are three terminals: power line, power return line and an "earth ground". You measure the noise of power line with reference to ...
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TN-S Earthing System
I wanted to give a good explanation about the installation that i have to examine. I want to explain that it has a TN-S earthing system.
I have conducted several measurements, and they yielded a loop ...
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Is it necessary to connect the (-) terminal to earth when connecting two bench top power supplies in series to achieve a bipolar supply?
I have noticed when researching online that it is always mentioned to connect the (-) terminal to earth when connecting two power supplies in series to create a bipolar supply. Is there any issue with ...
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how many electrodes for earthing a building
I have a building with 25~30 apartments 6 kW ~ 10 kW electricity registrations and a set of three motors for pumping water to a tank at the top, each nearly 800 W. Anybody can detail the ...
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Inverter, neutral-earth link and RCD breaker
I'm wiring an inverter in a vehicle and I would like to use a RCD breaker to protect against isolation faults.
The inverter is a Mean Well NTS-1200-224EU. The datasheet and the install manual are both ...
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Is it safe to connect AC earth to DC negative?
I'm going to use a switching mode power supply in a product. When I use no earth connection in the input, the metallic body of the PSU gives a little electric shock. (it has ~70V AC with reference ...
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To which ground should TVS or ESD diodes connect?
I am designing a circuit with both signal ground and earth. As far as I know, a TVS should be connected to the earth.
What if there is a huge voltage different between the ground and the earth?
Let ...
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Isolation transformer isolation side earthing best practices
I have been told I need my equipment to be isolated, but I want to make sure I fully understand when an isolation transformer is no longer isolated. The equipment I have clearly has an earth ground, ...
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Paintless (raw) aluminium enclosures connected to Earth: Bad practice?
I am producing a system with aluminium enclosures all connected to a central unit which is connected to Earth. All the enclosures of the system have their chassis ground connected together via cable ...
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Using a Plug-In AC/DC adapter Output's Negative as Earth GND
Now, this is not a general question about any plug-in 12V DC supply with a barrel connector output. They are all different. There are those without Eath GND wire in the AC power input, those with it, ...
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What is the exact reason for grounding (earthing) of a transformer? [duplicate]
I have some misunderstandings with the grounding of a transformer. As far as I know, the utility transformer's (the last transformer before my mains plug) neutral point (star-connected point of 3 ...
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How to determine your ground is connected to earth
I have a tester at a remote (international) site that has been having test failures. We traced the problem to a noise issue.
We were investigating the noise issues with the test/tester and ...
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