A question for anyone here familiar with Bonding and Grounding requirements as relates to Machinery and Machine Tools.
If I have equipment with 480VAC and 24VDC, what are the Bonding and Gounding requirements for a remote pushbutton box that only contains 24VDC and only connects to the PLC and 24VDC power supply at the other end?
Citing an NEC article number or other code (UL508A, NFPA 79, etc.) reference would be helpful and steer me in the right direction.
Your comments are appreciated.
If you don't find an answer here, try rec.crafts.metalworking, or see if there's a newsgroup that looks more like it's aimed toward electricians.
This group is mostly concerned with circuit design, not code compliance.
If you're doing this as a one-off in a plant and not as part of a machine design, then you're going to be subject to local electrical codes which may or may not conform to NEC, may be more or less strict, and will be subject to the interpretations of your local inspectors. So even if there were an answer that was 100% out of NEC, your mileage would still vary.
-- My liberal friends think I'm a conservative kook. My conservative friends think I'm a liberal kook. Why am I not happy that they have found common ground? Tim Wescott, Communications, Control, Circuits & Software http://www.wescottdesign.com
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For citing, the best is the Product Safety Engineering Society and EMC group hosted by the IEEE You do not have to be an IEEE tojoin the forum and answers come instantly from EVERYWHERE. Website:
Thanks Tim and Robert. I'll try your suggestions.
For citing, the best is the Product Safety Engineering Society and EMC group hosted by the IEEE You do not have to be an IEEE tojoin the forum and answers come instantly from EVERYWHERE. Website:
In general: protect the cable to the remote from physical damage. If using metallic raceway for that, the raceway must be grounded. If the remote push button box is metallic, it must be grounded.
The details of your installation and the location can make a difference, thus the general answer.
Ed
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