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Where in the NEC...

 
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prjm



Joined: 24 Jun 2008
Posts: 1
Location: Midwest US
PostPosted: Tue Jun 24, 2008 9:07 pm    Post subject: Where in the NEC... Reply with quote
What part of nec2008 covers signal wiring, such as process control signals to/from a PLC? ...and also information about such signals sharing conduits with power circuits?

prjm
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vince knight
Moderator


Joined: 04 Mar 2004
Posts: 1249
Location: Essex/East London
PostPosted: Wed Jun 25, 2008 9:07 pm    Post subject: Reply with quote
One for 'B' to answer I think as he is on your side of the pond Smile
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b
Moderator


Joined: 31 Aug 2004
Posts: 301
Location: michigan
PostPosted: Fri Jun 27, 2008 5:50 pm    Post subject: Reply with quote
I believe you are looking for article 645 in the NEC. You are not allowed to share a conduit with power and signal circuitry. In addition to the safety factor of getting the wrong wire... there is also concern of induced voltage on the signal circuit.
B
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