UNIVERSITY OF VIRGINIA
FINANCIAL AND ADMINISTRATIVE PROCEDURES MANUAL

TITLE: LOCK OUT TAG OUT FOR HAZARDOUS ENERGY SOURCES PROCEDURES

PROCEDURE: 14-6

DEFINITIONS APPLICABLE TO THIS PROCEDURE

AUTHORIZED PERSON(S)
Faculty, staff or student who has been designated by his or her department to perform maintenance or service on a piece(s) of equipment, machinery or system and; is qualified to perform the work through proper training on the Lock Out Tag Out procedures for the equipment, machinery or system.

AFFECTED PERSON(S)
Faculty, staff or student who has been designated by his or her department to operate equipment, machinery or systems that can be affected during shutdowns for service and/or maintenance. Only Authorized Persons using Lock Out procedures perform shutdowns. In addition personnel may be affected by shutdowns and Lock Out procedures when they are working in controlled spaces (e.g.- electrical power to work area is secured during renovation, demolition activities or abatement of hazardous materials).

CORD AND PLUG EQUIPMENT
Equipment that is powered by an electrical energy source that can be shut down by removing the cord and plug from the energy source.

ENERGY ISOLATION DEVICE
A mechanical device that is part of a piece of equipment, machinery or system that physically prevents the transmission or release of energy. Some examples include but are not limited to: manually operated electrical circuit breakers, disconnect switches, slide gates, line valves and blocks.

LOCKS
An individually keyed padlock personally assigned to an Authorized Person or Affected Person that is used with a lock out device to control and isolate energy sources.

LOCK OUT DEVICE
A device that uses a positive means such as a lock to hold an Energy Isolation Device safely and prevent the start up of a machine or equipment. Lock Out devices include but are not limited to: valve wheel covers, ball valve locks, locks for circuit breakers and; plug and switch plate locks.

LOCK OUT
The placement of a Lock Out Device including a padlock on the Energy Isolating Device of a piece of equipment, machinery or system. The placement is done in accordance with the department's established procedures that ensures the energy isolation device and equipment being controlled cannot be operated until the lock out device is removed. Only the Authorized Person who placed the lock on can remove it at the completion of the job. Procedures must include those conditions when personnel other than the Authorized Person can also be affected by accidental release of hazardous energy. An example would be multiple personnel performing work activities in a controlled space (e.g. electrical power has been secured to a work area, equipment, machinery or system). During Lock Outs by multiple personnel, the equipment, machinery or system must remain secured until the last Authorized or Affected personnel has completed his or her work task and has removed his or her lock.

SERVICING OR MAINTENANCE ACTIVITIES
Workplace activities that include but are not limited to: installing, setting up, inspection or maintaining equipment and; lubrication, cleaning and making tool changes where the employee may be exposed to the unexpected energization of the equipment or release of hazardous energy.

TAG OUT
Posting a prominent warning tag with durable string onto the energy isolation device and/or lock out device of the piece of equipment, machinery or system being controlled. This tag documents the Authorized Person taking the equipment out of operation and the date. It is a warning to others that the equipment cannot be put back into operation until the Authorized Person has removed the tag and lock.

ZERO MECHANICAL STATE
The mechanical potential energy of all portions of the equipment or machine is set so that the opening of pipes, tubes, hoses, or actuation of any valve, lever or button, will not produce a movement which could cause injury.



PURPOSE
The purpose of the Lock Out Tag Out Procedure is to document the sequence of steps the Authorized Person must follow to IDENTIFY and CONTROL all hazardous energy sources before performing service or maintenance on equipment, machinery or on a system. Electrical equipment (cord and plug) and (shutting off a disconnect) that will involve service or maintenance beyond the usual operation of the equipment also must be considered. Appropriate Lock Out Tag Out procedures need to be developed to ensure the employee doing the work is not exposed to the risk of an electrical shock and that any stored energy sources within the equipment (i.e.- capacitor) is identified. Refer to Special Precautions and Procedures to follow to safely shut down a disconnect.

Individual departments are responsible for establishing procedures specific to their areas of responsibility and; training their designated Authorized and Affected Personnel on these procedures. Equipment manufacturers, their service representatives or; the Equipment Operator’s Manual, can provide information on how to safely isolate the equipment’s energy source(s) during service or maintenance activities. Personnel must be authorized by the Department to perform this task; their qualification should include training and proficiency to perform the task. Consultation is available from the Office of Environmental Health & Safety. Lock Out Tag Out procedures must include the following elements.

  1. EQUIPMENT SHUTDOWN
  2. LOCK OUT TAG OUT DEVICES
  3. RELEASE ALL HAZARDOUS ENERGY SOURCES
  4. VERIFY THE EQUIPMENT IS IN A ZERO MECHANICAL STATE
  5. RE-ENERGIZING EQUIPMENT/MACHINE

Download:

Lock Out Tag Out Hazardous Energy Control Procedure Form (Template) - Word or pdf

University of Virginia Lock Out Annual Review Form - Word or pdf

Lock-Out Tag-Out FAQ (Frequently Asked Questions)

Safety Pointers Information and Training - Operating Electrical Disconnects - Word or pdf

 

ISSUED BY: Director, Office Environmental Health & Safety

CURRENT REVISION DATE: 12/03/13