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UNIT 1
PRECAUTIONS WHEN WORKING ON
LOW VOLTAGE ENERGIZED EQUIPMENT

1 Learn the meaning of the following words, word-
combinations and word groups:
Electrical equipment, de-energized, risk of injury, energized
equipment, written safe work procedures, a pre-job safety meeting,
technical specifications, single line diagrams, wiring diagrams,
block schemes, insulating barriers, shields, plexiglas plates,
grounded metal parts, circuit-protective devices, current-limiting
devices, arc flash, insulating cover-up material, contact with live
conductors, safety equipment and clothing.

2 Read and translate Text 1:
Text 1
Have eyes in the back of head. For most work, the electrical
equipment must be de-energized because there is a high risk of
injury to workers if they work on energized equipment. It may be
possible to schedule such work outside of normal work hours to
limit the inconvenience.
Sometimes it is not practicable to completely disconnect low-
voltage equipment before working on it.
For example, it may be necessary to have equipment running in
order to test it or fine-tune it. In such cases, the work must be
performed by workers who are qualified and authorized to do the
work. They must follow written safe work procedures.
You should observe the following important precautions when
working on energized equipment, but note that these are not a
substitute for proper training and written safe work procedures:
1. Think ahead
Assess all of the risks associated with the task. Plan the whole
job in advance so that you can take every precaution, including
arranging for help in case of paralyzing shock. Consider the use of
a pre-job safety meeting to discuss the job with all workers before
starting the work.

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