Electrical continuity testing 2

[oranjeep]

I am dealing with a problem of electrical continuity in a pneumatic conveying system. The system has to be continuous and grounged because of electrostatic build up from the fast moving air and particles insid the pipe.

How are these electrical continiuty test performed on pipe-or non-electrical components, like water pipes?

What equipment is used?

How reliable are the results?

Will the operation of the air flowing through the pipe give a false reading?

 

[resqcapt19]

The National Electrical Code does not require a maximum of 25 ohms to ground. It only requires, in 250.56, that if you are using a single electrode consisting of a rod, pipe, or plate that does not have a resistance to ground of 25 ohms or less, that a second grounding electrode be installed. This section doesn't even apply if you are using a service grounding electrode that is not a single rod, pipe, or plate. This is the minimum code requirement and most designers will require much less than 25 ohms, but the NEC does not.
Don

 

[peebee]

Any pharmaceutical plant would be designing to rather higher criteria than 25 ohms, though. Except maybe ImClone.