Electrical Work Practices City of Council Bluffs Presented by: SilverStone Group © 2012 Zywave, Inc. All rights reserved.

Today’s Agenda  De-energized parts  Lockout/Tagout of de-energized parts  Re-energizing equipment  Defining qualified staff  Special considerations for vehicles

Today’s Agenda This program communicates safe work practices to be used to prevent electrical shock or other injuries resulting from either director or indirect contact, when work is performed near or on equipment or circuits which are or may be energized.

Your Safety Responsibility When you are performing work on energized equipment, you are responsible for your safety and the safety of others in the area, and for preventing accidents through proper safety measures and anticipation of hazards. Never underestimate the importance of safety!

When Parts Must be De- energized  If an employee is going to be exposed to a live part during work on or near a machine, it must be de- energized unless de-energizing the part will cause additional or increased hazard  Live parts that operate at less than 50 volts to ground do not need to be de-energized, unless there is increased exposure to electrical burns or arcs.

De-energizing Equipment  Safe procedures for de-energizing equipment must be determined before circuits or equipment are de-energized.  Circuits must be disconnected from all electric energy sources.  Stored electrical energy must be released.  Stored non-electrical energy that could re- energize circuits must be blocked or relieved.

Lockout/Tagout  Once energy is released:  A lock and a tag must be placed on each disconnected circuit and equipment  If a lock cannot be applied, a tag can be used without a lock. If only a tag is used, one additional measure must be used to obtain the level of safety guarenteed by a lock.  Detailed information about Lockout/Tagout requirements can be found in the Lockout/Tagout Presentation provided by SilverStone Group.

Re-energizing Equipment  The following requirements must be met before equipment is re-energized, even temporarily: – A qualified person conduct tests and visual inspections to make sure equipment is safe for re- energizing – Employees must be warned to stay clear of equipment – All locks and tags must be removed by the employee who applied said locks and tags – There must be visual determination that all employees are clear

Working on or Near Exposed Energized Parts Only qualified persons may work on equipment that has not been de-energized Qualified person are those that are capable of working safely on energized circuit Qualified persons at City of Council Bluffs are specially trained to: Distinguish live exposed parts from other parts of electric equipment Determine the nominal voltage of live parts Understand the clearance distance necessary to stay safe while working near live overhead lines

Overhead Lines  If work is being performed near overhead lines, those lines must be de-energized and grounded.  If de-energizing is not possible, precautions must be taken to prevent employees from contacting lines with any part of their body, or through any conductive materials, tools or equipment.

Qualified Persons v. Unqualified persons  When working near overhead lines:  Unqualified persons cannot come within 10 feet of energized sources with voltages of 50 kV or below OR;  10 feet plus 4 inches for every 10kV over 50 kV  The rules regarding qualified persons vary based on voltage, and are addressed in writing within the [C_Offiicalname] written policy.

Working on Lines with Vehicular Equipment  Any equipment capable of having part of its structure elevated near overhead lines must maintain of clearance of 10 feet. If the voltage is higher than 50kV, 4 centimeters must be added for every 10 kV increase in voltage.  Employees on the ground should not contact the vehicle or mechanical equipment, or any attachments unless special precautions are taken. Those precautions are outlined in the written program.

Additional Items Additional items to consider: Employees should not enter spaces containing energized parts unless illumination is present. Protective shields must be used if employees are working in a confined space containing energized parts. Any conductive materials touching an employee’s body should not also come in contact with energized circuits. Conductive apparel (jewelry, watches, rings should not be worn if they may be exposed to energized parts).

Summary  Live parts to which an employee may be exposed must be de-energized using lockout/tagout procedures  Only qualified employees may work near energized parts, and only if de-energizing parts exposure employees to greater danger than working near energized circuits or components.  Special rules regarding work near overhead lines must be followed to ensure worker safety.

For More Information For more information regarding electrical work practices or other safety issues please contact your supervisor. Gary Miller Risk Manager