Semiconductor Projects Soar in the Rockies
HVAC Spring Maintenance
Electrical Troubleshooting Quiz
NEC at the Facility
The Practical Implications of OSHA 1926.403,
Answer to Electrical Troubleshooting Quiz
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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.
The Rocky Mountain region has become a hub of activity
for the semiconductor industry. The states of Arizona, Colorado, and
Idaho have more than $5.7 billion worth of active project opportunities
on the books, according to marketing information resources company
Industrial Information Resources (IIR). The company recently cited key
investments in each of these three states.
Intel Corp. has been investing heavily in its semiconductor
manufacturing facilities in both Arizona and New Mexico. Last year, the
company began construction on a $3 billion plant in Arizona and is
planning an additional investment of $2 billion on a
renovation/expansion of its Fab 22 facility in the state. In New
it began work on a $105 million wafer manufacturing plant conversion
project at the end of last year, and earlier this year broke ground on
$650 million wafer fabrication plant expansion at the same location.
In Boise, Micron Technology has plans for two major expansion
projects -- a $50 million memory chip and image sensor manufacturing
plant addition and a $1 billion semiconductor manufacturing plant
touch panel is available in 6-, 8-, 10-, 12- or 15-inch versions.
with an analog touch screen that eliminates defined touch cell
boundaries, C-more's configuration software allows objects to be
scaled and overlapped without limitation. Advanced capabilities include
built-in e-mail client, FTP and web servers. www.automationdirect.com/photoelectric
HVAC Spring Maintenance
In our previous issue, we explained that upsizing HVAC
units may actually reduce your cooling. If you have more heat
than your present system can overcome, you don't necessarily need more
cooling. You may simply need to reduce heat at the source and heat
infiltration into air-conditioned spaces.
To reduce heat at the source:
To reduce infiltration:
- Examine electrical infrastructure for power factor, harmonics
levels, and transformer loading.
- Upgrade to high-efficiency lamps and ballasts wherever possible.
automated lighting controls, especially in low-traffic areas in air
- Examine processes for opportunities to reduce process temperatures.
Reschedule some hot processes, if possible, to the night shift --
- Improve the ventilation of areas not served by air conditioning.
Look closely at ventilation hoods, ducting, and fan
- Reduce hot water temperatures. In many facilities, these
temperatures are unnecessarily high. Lower them, and less heat escapes
from hot water pipes into air-conditioned spaces.
This is only a partial list of what a facility can do to reduce source
heat and infiltration. For example, many companies have redesigned
processes to reduce the need for lift trucks. But those kinds of
improvements fall outside the realm of MRO. Other improvements do not
-- make an effort to involve your entire MRO team in uncovering these.
- Install air curtains and speed doors between hot areas and other
spaces. If you already have these items, now is the time to test them
for proper operation.
- Upgrade window treatments, and consider replacing sun-facing
with emissivity-corrected windows.
- Caulk, seal, and insulate.
Beware - Arc
Pin and sleeve plugs & receptacles can be dangerous if operated under
load. To prevent accidents install Decontactor Series switch rated
and receptacles. They are a UL rated plug, receptacle and disconnect
switch in one device. 100 kA short circuit ratings protect users in
fault conditions. Inquire about our free trial program.
Meltric Corporation, call 800-433-7642, www.Meltric.com
You discover you have only 105V on a convenience
receptacle, yet that branch circuit comes off a 120/208 panel. Then it
occurs to you the lights are dim. You measure only 442V at your
You look through the power monitor logs, and see that -- until a few
weeks ago -- you always had between 481V and 484V, and voltage has
been steadily declining since. What could be wrong?
The answer to this question appears at the end of this
Typically, the door fails so someone from maintenance
uses the manual over-ride and locks the door open so lift trucks can
through. After a few days, someone "gets around to" making the door
operable again. This involves replacing broken parts -- usually in
drive mechanism. But seldom does anyone fix the problem that causes
premature failure: excessive use.
You need speed doors for lift trucks, not for people. If space
permits, install a "service door." If you have a service door, post a
sign reminding pedestrians to use it. If your door operates off a
detector system, consider replacing that with a system requiring a
device (e.g., passcard) on the lift truck. You can use PLC control to
bypass this during shift changes, breaks, and other times when the
number of pedestrians makes the service door impractical.
SureTest® Circuit Tracer Takes Testing
to a New
The new SureTest® Circuit Tracer provides unparalleled
levels of precision and performance. The innovative, super-bright
SwivelDisplay rotates the reading for the user. In
addition, the exclusive displayed numeric value (0-99) and variable
tone/pitch audible maximizes the ease-of-use when identifying breakers,
tracing wires and finding opens/shorts. For more information on our
circuit tracer kits, click
here to download a PDF.
NEC at the Facility
In our previous issue, we touched on Article 230 (which
consists of seven parts), paying particular attention to Part I. Some
more common violations pertain to Part VI.
For example, the service disconnect must be in a readily accessible
location -- either outside the building or nearest the point of entry
of the service entrance conductors. This requirement allows
to quickly shut off the power. Yet, many facilities have access issues
that would create serious delays while people are trapped in a burning
building. Walk through Part VI requirements one at a time, and ensure
your facility complies. Doing so may just save a life one day.
The Practical Implications of OSHA
1926.403, Part 3
Two common misperceptions make life dangerous for MRO
OSHA requires a minimum of 3 feet of space -- sometimes more -- in
front of electrical equipment (including transformers), plus provides
requirements in other dimensions. These requirements are the legal
minimums. So, meet these and no crime is committed.
- As long as you leave pretty close to 3 feet of semi-cluttered
working space in front of an electrical panel, the installation is
- Since electricians don't need to get into dry-type transformers,
these make handy shelves (even if you block the vent).
But that doesn't mean these are the optimum clearances. Nor
does it mean they are necessarily adequate for safety or performance.
Don't be pressured into trying to get as close to the OSHA minimums as
bent ruler held at an angle will allow.
Instead, determine the space required to safely perform the
maintenance and repairs necessary for uptime. Make a list of all
maintenance and repair operations you could need at that location. Walk
through the procedures (how will you move switchgear cabinets, how much
room do you need to pull cable?) to determine the amount of space
needed. Then, erect proper barriers, and keep that space clear.
You will always have to cost-justify any space beyond OSHA minimums.
Build your case by showing the additional downtime hours incurred due
inadequate space. Be prepared to compromise with movable items being
in that space. Do not compromise on the OSHA minimums.
Replacement Contacts for Motor Starters &
Quality, low-cost electrical contacts for industrial motor starters &
contactors. Repco replacements for Allen-Bradley, ABB, Clark,
Cutler-Hammer, Furnas, GE, Hubbell, Siemens, Square D & Westinghouse.
Clark/Challenger/Joslyn/Sylvania series available: Old style
auxiliaries, Type CY, Type TM, Type KD, Type KS, Type 7400 (RS, RD, DC)
Answer to Electrical
Often when you have low voltage at a receptacle, the
problem is a failing or overloaded transformer. The same is true at the
service. First, contact your utility to ensure they are delivering the
right voltage to your transformer. If the utility owns the transformer,
they'll probably want you to shut down as soon as possible so they can
service it. If they don't own it, hire a specialist to service it.
Maybe servicing can correct the voltage deficiency or maybe you can
change a transformer tap (if advisable). But you might need to replace
the transformer. Or you may need to upgrade your service. Work with a
specialist to develop a plan, and act on it quickly. To get the
requisite downtime, explain that delay could mean several weeks with no
power if you lose that service transformer -- lead times may be
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