Maintaining Your Spare
NEC in the Facility
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e-newsletter is brought to you from the
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MRO Insider addresses topics such
Working with management and supervision
National Electrical Code® on the production floor
Safety procedures and programs
Equipment maintenance and testing tips
Managing motors and generators
Trends in training and education
Managing energy use
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The designations "National Electrical Code" and "NEC" refer to the
National Electrical Code®, which is a registered
trademark of the National Fire Protection Association.
It can be difficult to explain to the boss why you need
a second outage to replace a part you had in stock just prior to the
first outage. How can you prevent a "we didn't know it wouldn't work"
- Before adding a replacement part to inventory, check the part
number, size, and other identifying specs against your required
- Nothing goes into the stockroom without being properly labeled.
- The storage area may appear to be dry due to the absence of a roof
(water ingress), but it can still be humid enough for spare parts to
corrode. Consider using a dehumidifier.
To read more on this story, visit EC&M's Web
Imagine the possibilities
The New Fluke 233 Remote
Display Digital Multimeter allows you to be in two places at once. The
removable magnetic display allows you to be 30 feet away from the
measurement point. See how it will expand your capabilities. www.fluke.com/remote_display_meter
Each major process line has run under PLC control for
many years. A few years ago, you started seeing PLC module failures.
These haven't come anywhere near the published mean-time-before-failure
specs, so time in service isn't a factor.
After a couple of power supply modules failed, you used a power
analyzer to identify anomalies but didn't find any. Someone suggested
that maybe dirt was accumulating in the cabinets and causing
overheating. However, all of the PMs have a line item "clean cabinet
interior," and it's obvious that techs are wiping the bottom of the
cabinets during PMs. Another person suggested grounding and bonding
issues, but the systems comply with the NEC Art. 250 Part V and other
Where do you go from here?
Visit EC&M's Web
site to see the answer.
In a perfect world, your team would fully analyze every
failure, identifying the root cause and contributing causes with
pinpoint accuracy. Unfortunately, the realities of time and money don't
make this feasible.
Traditional failure analysis procedures exceed what's reasonably
achievable in the field. A tech confronted with a complex,
time-consuming post-mortem procedure won't follow it, especially when
there are fires to put out.
The solution is to create simple procedures that repair techs can
to quickly collect relevant data, plus do basic diagnosis. They might
find only contributing causes this way, but at least they’re doing
something post-mortem. When you aggregate the data of several
repairs, you can focus limited resources for root cause analysis on the
problems identified by trending.
Motors and Drives Solutions
Motors and drives are
critical elements of most machines. Visit the Fluke solution center as
resource for all your motor and drive issues. Here you will find
application notes, case studies, an on-line discussion board, videos
other resources to help you deal with these complex and important
NEC in the
Provide adequate overhead clearances from buildings to
overhead service conductor final spans. The NEC doesn't allow you to
these conductors under openings through which materials might move or
where they might obstruct such openings [230.9].
The NEC also requires that conductors maintain a vertical clearance
of 3 ft from doors, porches, balconies, etc., and from windows that
open. That distance isn't nearly as much as it might seem. If you want
to ensure you're protecting someone who's standing in a door or opening
a window, allow for that additional distance.
To read more on this story, visit EC&M's Web
Where can you take breaks? On construction sites,
electrical rooms often serve as makeshift breakrooms. From an
hygiene standpoint, this is a bad idea because it introduces food and
thus vermin into these spaces. From an electrical safety standpoint,
it's not an immediate problem if these rooms don't contain energized
equipment. However, taking breaks in such rooms with energized
unnecessarily exposes you to flash and arc blast hazards.
Even if you took breaks fully decked out in a flash suit (not
likely), just being in the area introduces unnecessary risk. Always
breaks in areas specifically designated as breakrooms.
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— or call toll free 800-701-0975.
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