Problems with multiple ground connections

[The_Lobster]

Homework Statement

What are some problems that can occur if two pieces of equipment both are connected to mains earth?

Homework Equations

The Attempt at a Solution

If they are connected to common ground, ground loops or low impedance loops can occur. Ground loops can cause stray currents, the circuit will be unbalanced, hazardous voltages can occur, and the system will be sensitive to pick up interference from mains wiring which will introduce noise and can also cause malfunction or damage to the equipment..

Is this sort of right? Any thing I missed?:-)

 

[KataKoniK]

Yes, you are correct. Some other potential problems that can occur if two pieces of equipment are connected to mains earth include:

1. Grounding issues: If the ground connection is not properly installed or maintained, it can lead to unreliable grounding which can result in electrical shocks, equipment malfunction, and even fires.

2. Electrical noise: As you mentioned, connecting two pieces of equipment to mains earth can introduce noise and interference from other electrical sources, leading to distorted signals and inaccurate readings.

3. Overloading: If the two pieces of equipment have different earth potentials, connecting them together can cause an overload on the circuits, leading to equipment damage or failure.

4. Safety hazards: If the equipment is not properly grounded, it can pose a safety hazard to the user. For example, if a fault occurs, the equipment may not be able to discharge the electrical current, leading to a shock hazard.

5. Compatibility issues: Some equipment may have different grounding requirements, and connecting them to a common ground can result in compatibility issues and potential damage to the equipment.

Overall, it is important to carefully consider the grounding requirements of each piece of equipment and ensure that proper grounding techniques are used to avoid any potential problems.