THE BUZZ “OSHA believes that injury prevention programs provide the foundation for changes in the work- place” OSHA Injury Prevention Whitepaper 2012, U.S. Dept. of Labor In This Issue Confined Space N.E.C. Q&A Director’s Desk Schedule of classes Variable Frequency Drives The Electrical Training Institute Electrical Training Institute Newsletter November 2013 New JW Class: Confined Space Training Why it matters Workspaces are considered “confined” if the occupant’s activities or movement are re- stricted by the space. Common confined spaces found in the electrical industry are vaults, tunnels, and vessels. An average of 92 workers per year die in accidents related to con- fined spaces. OSHA provides guidance for the permitting and restriction of access for classified confined spaces. Prevention of catastrophic incidents involving confined spaces is heavily dependent on employee training. In response to the dangers presented by these environments, we have developed a customized training structure to simulate these hazardous jobsite conditions. Class Instructor and format The instructor will be Stan Corson, a seasoned OSHA instructor and certified confined space trainer. He brings years of experience in the instruction of employee safety to the IEJATC. The class will be held both standalone and in conjunction with current OSHA 30 courses. Participants will trade time working in the confined space and acting as the re- sponsible person overseeing the entrant. Permitting requirements, air monitoring and entrant recovery will be covered. Upon completion of the course, participants will be able to recognize and mitigate hazards in confined spaces.
Transcript
THE BUZZ
“OSHA believes that
injury prevention
programs provide
the foundation for
changes in the work-
place”
OSHA Injury Prevention
Whitepaper 2012,
U.S. Dept. of Labor
In This Issue
Confined Space
N.E.C. Q&A
Director’s Desk
Schedule of classes
Variable Frequency
Drives
The Electrical Training Institute
Electrical Training Institute Newsletter November 2013
New JW Class: Confined Space Training
Why it matters Workspaces are considered “confined” if the occupant’s activities or movement are re-
stricted by the space. Common confined spaces found in the electrical industry are vaults,
tunnels, and vessels. An average of 92 workers per year die in accidents related to con-
fined spaces. OSHA provides guidance for the permitting and restriction of access for
classified confined spaces. Prevention of catastrophic incidents involving confined spaces
is heavily dependent on employee training. In response to the dangers presented by
these environments, we have developed a customized training structure to simulate these
hazardous jobsite conditions.
Class Instructor and format The instructor will be Stan Corson, a seasoned OSHA instructor and certified confined
space trainer. He brings years of experience in the instruction of employee safety to the
IEJATC. The class will be held both standalone and in conjunction with current OSHA 30
courses. Participants will trade time working in the confined space and acting as the re-
sponsible person overseeing the entrant. Permitting requirements, air monitoring and
entrant recovery will be covered. Upon completion of the course, participants will be able
to recognize and mitigate hazards in confined spaces.
National Electrical Code Corner
Why do we need to de-rate the ampacity of con-ductors?
Derating the conductors’ ampacity
falls into two categories:
1. Correction Factor based on
[310.15 (B) (2)]
2. Adjustment Factor based on
[310.15 (B) (3)]
They both are determined on the ability of the conductor to dissi-pate heat. While the Correction factor [310.15 (B) (2)] is calculat-ed from the ambient room or area temperature, the Adjustment fac-tor [310.15 (B) (3)] is based on the number of current carrying con-ductors with or near other current carrying conductors.
Remember to determine the con-ductor’s ‘new’ ampacity, you want to multiply the table value with the percentage, but when you need to size the conductor from the load amperage, you will need to divide the load amperage by the per-centage, and then take that ‘new’ value of amperage to the table for the correct conductor diameter.
Please send your questions to [email protected] or call (317)270-5282 ext.207
Rick Ruble, Sean Seyferth, Mike Pence, Chris Chastain, Jim Patterson
Director’s Desk
Welding class results
Governor and Labor
Commissioner visit
training center
Jobsite Evaluations
Did you know? Apprentices can now submit their work hours online and submit jobsite evaluations to [email protected]
Results from welding class The first welding class held at the Carpenters and Millwrights JATC received excel-
lent reviews. The class participants had experience levels ranging from never striking
an arc to significant time under the hood. Four of the ten members attempted and
passed the American Welding Society certification test. These members now have
nationally recognized credentials to prove their welding abilities. We will continue to
schedule classes based on member interest. The class fees are $275 for the 48 hour
class and $35 for AWS certification.
Governor Pence and Labor Commissioner Ruble visit our facility We hosted an educational summit for the Governor and Labor Commissioner to
showcase union trades apprenticeship. Governor Mike Pence ran on a platform sup-
porting vocational training for Hoosiers. Jobs in the manufacturing and life sciences
sector require skilled craftsmen to give Indiana a competitive advantage. The Electri-
cal Training Institute has been the predominant leader in vocational training in central
Indiana for 65 years. Our program provides a clear path to career opportunities and
industry recognized certifications. We will continue to work within our industry to pro-
vide the level of training the Governor is supporting.
Keep those evaluations coming The implementation of online work hours and the change to the apprentice evaluation
form have led to positive outcomes for our members. Valid and timely assessments
help us gauge our apprentice’s performance on the job and identify areas for im-
provement. Ultimately, our industry will be stronger and more competitive because of
your mentoring and input on the apprentice’s abilities.
No three phase service,
no problem
The operation of many VFD’s allow the electrician to connect single phase 115/230 as the line in and generate an output of three phase
208/230V .
Acting as both a phase converter and speed control, these units are commonly installed on machin-ing and woodworking equipment in facili-ties not serviced by
three phase power.
Check it out:
EV Micro Drive by
Teco
Variable Frequency Drive’s 101
What they do While many of us have connected power to the line side and fed motors off the load
side, what goes on inside the VFD is often overlooked. A basic VFD consists of
three areas: a rectifier, a DC bus with filter, and an inverter. This process allows the
VFD to change both voltage and frequency to the motor, changing the speed. We
learn in our apprenticeship that motor speed is a function of the number of poles and
the input frequency. While we don't change the number of poles, we can alter the
frequency.
Sounds cool, how can I learn more? Glad you asked. We have recently secured grant funding to purchase several VFD
units. This equipment will be used in the new VFD class we began offering this
year. As a complex component of a motor control scenario, some prerequisites are
required to participate. To enroll in the VFD class, you must have completed a mo-
tor control class and PLC class in the previous five years. Recent graduates can
use their apprenticeship training in lieu of these prerequisites.
