Dennis Harding
New member
- Location
- Tell City,Indiana, USA
Over the years I have come across some misunderstood grounding/bonding techniques.
Some of them can be quite dangerous. As on one of Mikes videos is discussed, just because there is a "ground" lug on a piece of equipment doesn't mean it gets connected to ground. Often it would be more proper to be Bonded and even then extreeme care should be used. The welding machines (from single portable to 8-bank systems) are a prime example. I have seen first hand numerous liquid tight metal flex on fire, many motor/equipment bearings welded together from their improper use. We have come to see much talk about step voltages/gradiants and such. We are getting much more educated about grounding and bonding, this is a good thing. These step voltages/gradiants are not only a personal safety problem but also an electronic problem. As we have grown into such an electronic world the problem also grows.
Here are a couple links to important reading on this matter:
http://www.nnyneca.com/pdf documents/NEIS Yearbook_Vol 6/NECA331_09_P.pdf
http://www.solacity.com/docs/erico - practical guide to electrical grounding.pdf
Education, understanding and care is needed in any grounding/bonding application.
Some of them can be quite dangerous. As on one of Mikes videos is discussed, just because there is a "ground" lug on a piece of equipment doesn't mean it gets connected to ground. Often it would be more proper to be Bonded and even then extreeme care should be used. The welding machines (from single portable to 8-bank systems) are a prime example. I have seen first hand numerous liquid tight metal flex on fire, many motor/equipment bearings welded together from their improper use. We have come to see much talk about step voltages/gradiants and such. We are getting much more educated about grounding and bonding, this is a good thing. These step voltages/gradiants are not only a personal safety problem but also an electronic problem. As we have grown into such an electronic world the problem also grows.
Here are a couple links to important reading on this matter:
http://www.nnyneca.com/pdf documents/NEIS Yearbook_Vol 6/NECA331_09_P.pdf
http://www.solacity.com/docs/erico - practical guide to electrical grounding.pdf
Education, understanding and care is needed in any grounding/bonding application.
