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CONTENTS
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Lighting Maintenance
Maintaining Flash
Protection
Electrical Troubleshooting
Quiz
Solving Lamp and Ballast
Failures
NEC in the Facility
Safety
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About This Newsletter
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This twice-a-month
e-newsletter is brought to you from the
publisher of EC&M magazine. MRO Insider addresses topics such
as:
Working with management and supervision
National Electrical Code® on the production floor
Safety procedures and programs
Troubleshooting techniques
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
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Maintenance
Lighting
Maintenance
Lighting maintenance programs typically seek to
continue
poor lighting at inflated cost, instead of providing the proper light
at
optimal cost. Consider two underused opportunities for accomplishing
the
latter:
- Cleaning. Over time, fixtures and lenses can accumulate
enough dust to severely diminish light output. Dust also serves as a
thermal insulator, thereby shortening component lifetime.
- Upgrading. Kick lighting maintenance up a few notches on the
value chain by ensuring the lighting system conforms to current
standards. Schedule an assessment of the light adequacy and efficiency,
one room at a time. Replace old fixtures with newer energy-efficient
ones, as needed. When you reduce energy loss at the fixture, you also
reduce the air-conditioning load.
Maintaining
Flash
Protection
If your facility contains electrical equipment that may
require maintenance while energized, that equipment must be marked with
flash hazard warnings [110.16]. These markings alert people to the
presence of a hazard, but they don't ensure the proper flash hazard
analysis (per NFPA 70E) has been done for that equipment and that area.
Is there a tool you can use to ensure every piece of equipment has
an
up-to-date and complete flash hazard analysis? Yes, and you probably
have it already.
To read more on this story, visit EC&M's Web
site.
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Repair
Electrical
Troubleshooting Quiz
The maintenance department recently has received
complaints about inadequate lighting from various managers, the HR
department, and production employees. You reviewed the lighting layout
drawings and lighting specifications and have found that, if anything,
the areas in question are slightly over-lit. You know that low voltage
can cause significant lumen output reduction, but you checked the
system
voltage and it's where it should be. What should you do to
investigate
and resolve the cause of the complaints?
Visit EC&M's
Web site to see the answer.
Solving Lamp
and
Ballast Failures
With today's complex loads, it's unlikely a lamp or
ballast failed due to some random event that won't happen again and
destroy more lamps or ballasts. Thus, a replacement isn't a repair.
It's
just a way to spend money until someone actually does the repair.
Any time a lamp or ballast fails, use a power analyzer to look
for:
- Voltage sags and surges.
- Low power factor on that branch circuit.
- Waveform "holes" and other anomalies.
Also check for bonding deficiencies, which are likely if you have
waveform anomalies, flashovers, or undesired current flow.
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Operation
NEC in the
Facility
Save money on intrinsically safe installations. How?
Here are three ways:
- Use a general enclosure with intrinsically safe apparatus;
permitted
by 504.10(B).
- Rather than using special wiring methods, use any of the wiring
methods suitable for unclassified locations when installing
intrinsically safe apparatus [504.20].
- Don't seal enclosures that contain only intrinsically safe
apparatus (except as required by 501.15(F)(3)); permitted by
[504.70].
To read more on this story, visit EC&M's Web
site.
Safety
Arguably, the most misused piece of non-wearable
personal protective equipment (PPE) is the electrical insulating
blanket. This blanket is designed to serve as a shield between the
electrician and exposed parts. It's not a cushion, kneeling pad, or
"clean pad" for laying out tools or materials. A single misuse of the
blanket can cause it to lose insulation integrity.
Don't set anything on the blanket, and don't set the blanket on
anything other than the equipment against which you need a touch
barrier.
Before using the blanket, follow the recommended inspection
procedures. When you're done using the blanket, inspect it again
(destroy and replace, if damaged). Store blankets per the
manufacturer's
instructions (e.g., roll up and put in storage sleeve).
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