NEC in the Facility
May 11, 2009 11:26 AM
To prevent unintentional interference during testing and servicing, intrinsically safe circuits must be identified at terminal and junction locations [504.80]. Obviously, there’s a problem if you can’t read the labels.
Tag every cable and terminal with clear, legible, and durable labels. Doing this is part of good workmanship [110.12]. It also reduces confusion, prevents errors, and reduces downtime.
A professional-level label tool makes the labeling task much easier, and you may find the advanced models worth the additional investment. A good labeler pays for itself in short order.
If you don’t have a labeler but do have a squeaky-tight budget, look for other ways to cut expenses. For example, you don’t have to seal enclosures that contain only intrinsically safe apparatus, except as required by 501.15(F)(3)) [504.70].
Want to use this article? Click here for options!
© 2010 Penton Business Media, Inc.
MRO Insider
Safety
Mar 9, 2010 12:46 PM
The best protection against arc blast is "don’t be there." This, however, isn't always possible. The next best precaution is...
NEC in the Facility
Mar 9, 2010 12:43 PM
Most facilities today have surge arresters on the building supply (service). These are typically bought on a budget mentality that results in a waste of the entire investment. It doesn't have to be that way...
Failed Repairs
Mar 9, 2010 12:42 PM
A repair that isn't done correctly is a failure waiting to happen. Some common errors include...
Electrical Troubleshooting Quiz
Mar 9, 2010 12:27 PM
A rash of motor failures has afflicted your plant. Your plant engineer read some application notes from the Web site of a test instrument manufacturer and subsequently used a power analyzer on the feeders of these motors...
Acceptable Use Policy blog comments powered by Disqus
advertisement
what's wrong here?
|
Whats Wrong Here?Mar 11, 2010 12:54 PM |
|
What's Wrong Here?Feb 18, 2010 5:04 PM |
|
What's Wrong Here?Feb 4, 2010 5:06 PM |
View all What's Wrong Here?
What's Wrong Here
Sponsored By:

Email

































