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 Great Western Painting
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 Safety Questions Call Bob   208-371-7757

                                                                                                 

 Patrick  1 - 877-749-5554   /     pat@greatwesternpainting.com

 We Serve  All of USA
In Commercial & Industrial Painting &
SandBlasting

   We specialize in Water Towers Industrial Tanks & Logos High Rise Buildings -
Chemical Plants - Factories . Casinos  Office Structures
- Theme Parks - Custom Cars - 
Structural Steel - 
 Industrial Pipes  -  Silos -Vinyl Wall Covering & More

Electrical

Overhead Powerline Hazards



  
Problem: Overhead high-voltage conductors or "lines" are usually bare wires supported by poles or structures,
traversing across mine property. A risk of danger exists for personnel when mobile equipment, such as trucks, drill rigs, cranes, etc. contact these lines. Based on accident data recorded by MSHA from 1980 to 1997, there have been
106 accidents involving overhead lines. Of these 106 accidents 32 resulted in fatalities.

Overhead lines near the following sites and activities can present a serious hazard:
  • Storage yards and delivery areas (where cranes may operate).
  • Mobile equipment maintenance, parking, and fueling areas. 
  • Haulage and access roads, particularly those near dump/load points, and pull-off areas on these roads (dump-bed trucks running with beds up, cleaning beds, and raising tarps). 
  • Stockpiles, dumping points, loading areas, and truck scales (raising truck beds). 
  • Mining benches and active pit areas in general, particularly near blast hole drilling operations. 
  • Adjacent to mine plant structures, such as processing plants, slopes/hoists, belt lines, transfer points, settling ponds, and waste dumps (cranes and dump-bed trucks used in routine maintenance). 
  • Exploration/test drilling sites. 
  • Construction sites, particularly if cranes or scaffolds are in use. 
  • Unintentional buildup of roadways under overhead lines.

There are several ways to avoid accidental overhead electric power line contacts and resulting injuries:

Solution

  • Position miners as "spotters" to alert equipment operators of the proximity of their equipment to energized powerlines
  • Install and maintain commercially available non-contact powerline proximity devices. These devices can: 

    • provide audible and visual alarms,
    • shut down an entire machine or desired functions of a machine,
    • be designed to detect powerlines from far distances, and
    • provide protection for the entire length of a boom or truck bed.
  • Recognize potential hazards. Train workers to "Look up" prior to starting work. 
  • Install physical barriers under overhead lines. 
  • Erect signs to identify a danger zone 
  • Raise problem sections of overhead line to at least 40 ft. above ground. 
  • Have the electric power utility company install insulating barriers or sleeve conductors where equipment must operate. 
  • Have high visibility spheres installed on energized lines to help make the line location obvious to all workers. 
  • Have the electric power utility company temporarily de-energize the power lines.
Spherical Line Indicators at Potential Contact Points
Spherical Line Indicators at Potential Contact Points
   ower Powerline Insulating  GuardsLine Insula
Risk control
15 If the overhead line cannot be diverted or switched off, and there is no alternative to carrying
out the work near it, you will need to think about how the work can be done safely. If it cannot be
done safely, it should not be done at all. Your site-specific risk assessment will inform the
decision. Things to consider as part of your risk assessment include:

■ the voltage and height above ground of the wires. Their height should be measured by a suitably
trained person using non-contact measuring devices;
■ the nature of the work and whether it will be carried out close to or underneath the overhead
line, including whether access is needed underneath the wires;
■ the size and reach of any machinery or equipment to be used near the overhead line;
■ the safe clearance distance needed between the wires and the machinery or equipment and any
structures being erected. If in any doubt, the overhead line’s owner will be able to advise you on
safe clearance distances;
■ the site conditions, eg undulating terrain may affect stability of plant etc;
■ the competence, supervision and training of people working at the site.

16 If the line can only be switched off for short periods, schedule the passage of tall plant and,
as far as is possible, other work around the line for those times.
overhead lines that the safety an be infringed by people standing on them.
overhead line an be infringed by people standing on them.


ting Gu
If someone or something comes into contact with an overhead line, it is
Important that everyone involved knows what action to take to reduce the risk of anyone sustaining an electric shock or burn injuries.
Key points are:

■■ never touch the overhead line’s wires;

■■ assume that the wires are live, even if they are not arcing or sparking, or if theyotherwise appear to be dead;

■■ remember that, even if lines are dead, they may be switched back on either automatically after a few seconds or remotely after a few minutes or even hours
if the line’s owner is not aware that their line has been damaged:

■■ if you can, call the emergency services. Give them your location, tell them what
has happened and that electricity wires are involved, and ask them to contact the line’s owner:

■■ if you are in contact with, or close to, a damaged wire, move away as quickly
as possible and stay away until the line’s owner advises that the situation has been made safe:

■■ if you are in a vehicle that has touched a wire, either stay in the vehicle or, if you
need to get out, jump out of it as far as you can. Do not touch the vehicle while
standing on the ground. Do not return to the vehicle
 until it has been confirmed that it is safe to do so;

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ards

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