Grounding screened control cables
- Thread starter sirhiss2
- Start date
Well this is probably one of the most contentious subjects in the control industry. There is no fast rule. Your solution is defined by:
1) Potential ground difference between point A...B
2) Danger this potential difference poses to human or electronics
3) Types of noise environment. Harmonics, Neighbouring Arc ovens etc
4) Dampness of ground structure and ground composite eg. water table, Rock type formation
5) Weather conditions Electric storms
Solutions as stated is also varied pending on condition
Single ended grounding
Double sided grounding
Isolation to split two areas with high potential differences
Telemetry or radio signals if all else fails
On the end of the day what works for the particular situation is the solution. There cannot be hard and fast rules and the fixed conditions of the environment or structures and the cost of the correct solution can be prohibitive. Each case has to be analysed on its own and appropriate measures taken. Sometime it is best to bring in experts to do a ground potential analysis and is warranted or required in many instances.
Nothing beats a proper structural sound earthing system between two separate plant areas or distance buildings and can save a lot of cost and damage over years.
My practical 2c based on experience over 20 Years.
Practical examples or stories could be related here but I think that is beyond this discussion
1) Potential ground difference between point A...B
2) Danger this potential difference poses to human or electronics
3) Types of noise environment. Harmonics, Neighbouring Arc ovens etc
4) Dampness of ground structure and ground composite eg. water table, Rock type formation
5) Weather conditions Electric storms
Solutions as stated is also varied pending on condition
Single ended grounding
Double sided grounding
Isolation to split two areas with high potential differences
Telemetry or radio signals if all else fails
On the end of the day what works for the particular situation is the solution. There cannot be hard and fast rules and the fixed conditions of the environment or structures and the cost of the correct solution can be prohibitive. Each case has to be analysed on its own and appropriate measures taken. Sometime it is best to bring in experts to do a ground potential analysis and is warranted or required in many instances.
Nothing beats a proper structural sound earthing system between two separate plant areas or distance buildings and can save a lot of cost and damage over years.
My practical 2c based on experience over 20 Years.
Practical examples or stories could be related here but I think that is beyond this discussion
Last edited:
Similar Topics
Hi all,
I'm connecting several 4-20mA sensors together in parallel (only one shown below) The enclosure is ABS plastic with metal backplate
DAQ...
I have Rhino 120 to 24 dc power supply and it has 2 Positive and 2 negative terminals on the DC side but no ground terminal. Should I connect one...
Hi,
Our customer has bought a machine a CNC wood cutting machine. It states that it need a seperate 16mm2 EMV"ground" in addition to our 5G16mm2...
I have a Beckhoff PLC with many AI modules. Most devices are loop powered using the same +24 VDC power as the Beckhoff Bus Coupler and all is...
I was once asked a question in a job interview. "Do you ground both ends of a shield?"
I answered: "You only ground one end".
Apparently that was...