Surface Roughness and Electrical Connectivity

[phamENG]

Good morning, everyone. Can anyone point me in the direction of a good resource relating surface roughness and/or topology to electrical contact performance? Are there maximum/minimum roughness characteristics that are recommended for mated parts conducting electricity? Do these change with voltage/amperage? If you think this would be better received/responded to in a different forum, please point me in the right direction. Thanks.

 

[rothers]

Ragnar Holm is gernerally considered to be the "bible".

Link

 

[phamENG]

Thanks. Looks like the local university has a copy - I'll try to get by there and pick it up.