Grounding Definition and 131 Threads

Homework Statement A demonstration device consists of two parallel metal plates separated by an insulating support. The device is placed on top of a negatively charged van de Graaff generator. In between the plates are several Stryofoam balls covered with metallic paint. a) Describe what...

I get an electric shock whenever I connect my digital camera or camcorder to my TV. The shock occurs whenever I touch the camera. The TV plug has only 2 pins. So my first thought is to provide a ground return for the TV power. The shock hazard occurs only with the 2 pin plug equipments like...

I'm trying to refurbish a Heliostat and utilize a computer to control the three phase motors that came with the device. However, I'm having an issue with my control circiut for the three phase relays I've purchased. I'm using two Struthers-Dunn 645RT series SS motor reversing relays which...

Trying to get a link that works. http://news.google.com/?hl=en-GB Qantas grounds A380s after engine blast The Australian - Steve Creedy, Peter Alford - ‎1 hour ago‎ Firefighters surround the Qantas superjumbo after it made an emergency landing at Changi airport in Singapore following an...

Do you use a grounding strap when working on electronics? http://en.wikipedia.org/wiki/Antistatic_wrist_strap I'm going to start working more on upgrading and replacing parts in computers at my job, and I'm wondering if I should get one of these. I don't see our techs wearing them, though.

if I have 2 spheres A and B initially neutral, isolated from ground and in contact with each other, when I bring a negatively charged rod near to sphere A, I understand that positive charges will be induced on A and negative charges on B. Suppose I were to ground the sphere (a wire either...

So, I've heard it said that when you use a hand-held radio, your body acts as a ground. Let's say I wanted to go on an adventure with my homemade flying machine (lawn chair and weather balloons). Obviously, my friends would like to know how the world looks and feels from that height. I choose...

Hi, My main question is how to ground a 2-prong if the electrical utility originally was a 3-prong, but the grounder fell off? The story is that I went to this new music studio and played the electric guitar while singing in the mic. The mic shocked me. I guess something wasn't properly...

Hi all. I have a nice little PIC-based system built onto a breadboard. It has ADC and USB capabilities. I wish to connect a function generator to one of the ADC input pins of the PIC to feed it a sine wave. The board is powered by the USB. However, whenever the three grounds are united...

Hi, I have a question about grounding. Everything's relative right? Take two power supplies, each at 15+ DC and link one to the other (in series). Connecting to the circuit you will have a zero point (ground), a +15 VDC, and a -15 VDC. Reconfiguring the circuit and calling -15 VDC ground you...

What stops current from flowing through the grounding wire? How come it can flow through once another part of the circuit breaks?

Grounding is used for dircharging.. In case of charging by conduction,let a sphere having excess negative charge is brought in contact with a neutral sphere..Half of the negative charge goes into neutral sphere..But when the former sphere having excess negative charge is grounded,why it becomes...

hi gents, need ur assitant in finding the current carrying capacity of grounding strap (braided cable) if the cable size is one inch or 25 mm, how can I know how much current can it handle? your help is highly appreciated. Regards,

Hello. I am searching some E-books,projects about switchyard grounding like how can we calculate,periodically check etc. Can anyone help me to find some materils..Thank you..

Hi all. In the building I live in, some people I know have removed the ground plug from their three-pronged appliances in order to plug them into the house's older, two-wire setup. There is only a limited number of 3-conductor outlets in the house. I've urged them to stop doing this because...

I have a quick silly question for a first-timer at assembling circuits. I have a circuit with a photodiode input and a BNC/coaxial output to a scope. The circuit diagram is below. In assembling this circuit, I'm not sure where to ground to. I've put it in a metal enclosure. One book says...

Hi all, I want to use a 0 ohm resistor for single-point grounding to connect analog/digital ground together. Since the current could be pretty large (several hundred mAs), I'm considering how to choose the resistor for its power consumption. Yes it's "0 ohm", which makes it seem that any size...

what are the advantages and disadvantages of different types of transformer grounding -with regard to system protection and fault current reduction? we have the following grounding types YN - YN YN - Delta Delta - YN Delta - Delta where can i find a good resource that explains this?

Hi I need an explanation of the Earth grounding in electric courses I can't appreciate the role of an Earth grounding does the Earth surface really act as a common node for all Earth grounded systems? Can we then send a signal using one wire only?? thanks in advance?

Hi all. We're moving to a new lab and I need to have a reliable ground for ESD protection, e.g. connecting the ESD mat safely. My questions are: can I just use the ground in the power outlet, or I need to request a different ground? Do I need to connect a resistor between the mat and the ground?

do ‘grounding’ and ‘earthing’ point to a same thing? Is there any difference between them?

The electronic control systems in one power plant are digital base and separated "one point" grounding system is considered for it. In that power plant, the separated hole of electronic grounding is located far from control room, therefore the used cables for suitable interconnection between...

Here is a question I ponder sometimes: Does anyone know how they ground electronics in space? I was thinking that they might use a virtual ground. Does anyone know how it is done, for sure?

In my physics book it says that friction between cars and air can cause a build up of charge on the vehicle's body and that's why a rubber strip is often connected from the body of the car to the ground - to ground the car. Since the tyres which are rubber are connected to metal which is...

I'm not sure of the proper term here, but I'd guess it is either earth, ground or grounding resistance. The task is to compute this grounding resistance for a sphere electrode (radius a) in a ground (conductivity sigma). The definition given for grounding resistance "between the surface of the...

I designed and built a portable wash and work station for my friend who is in the beatifcation business. its a four foot long folding table with folding metal legs and has a small wash basin and one 120 volt GFI outlet that is pluged into the house power source. My quest is to ground this unit...

In a recent electronics lab, we designed a simple circuit consisting of only three resistors and a battery. After recording all the relevant data for the system (I, V drop, R, etc), we then grounded it by attaching a wire from one of the resistors to a metal bolt attached to a nearby water...

I've just added a log cabin on my property. It came prewired and all I have to do is add the lights, outlets switches and run a service from my house. The building has 3 circuits as follows: Ckt #1 = (4) 15A outlets #12/2 wire with a ground Ckt #2 = (4) 15A outlets #12/2 wire with a ground...

Hi, I would like to ask a question about grounding conductors. Suppose we have concentric spherical thin conducting shells (consisting of an inner conductor and an outer conductor). Suppose a charge of +Q is placed on the inner conductor. If we ground the outer conductor, my understanding is...

OK, so we have a coaxial cable that consists of a solid cylinder at the core and two concentric cylindrical shells. All the components are conductors. The outer surface of the outer cylinder is grounded and the inner solid cylinder has a linear charge density of lambda. Disregarding the...

If a very large amount of power was grounded say in house and all the taps for example were connected to the same circuit would somebody touching a tap get any sort of eletric shock. I have heard that some peoples TVs etc explode when their house gets hit by lightning even though they have...