Preparer: Owner: Approver: EHS Team Member TES Manager Site Manager

Transcription

1 Procedure No.: BMEHS Page: 1 of 10 Preparer: Owner: Approver: EHS Team Member TES Manager Site Manager Document Revision Change Table Revision Revision Description Revised Revision Number New By Date 1 General update and incorporated BC changes RFF 11/21/11

2 Procedure No.: BMEHS Page: 2 of PURPOSE AND BENEFITS To establish a policy for working on or near energized parts operating at 50 volts or greater. 2. DEFINITIONS 2.1 Attendant An individual assigned to act as an emergency contact for an electrical job in progress. This person may be located either adjacent to the electrical task or remotely at the discretion of the qualified personnel performing the task. The primary role of this person is to summon emergency personnel if necessary. For the purposes of energized electrical work this person shall be qualified. 2.2 Boundary Flash Protection Boundary Limited Approach Boundary Restricted Approach Boundary Prohibited Approach Boundary Energy Source Flash Protection Boundary The distance at which the energy from an arc flash is 1.2 cal/cm 2. Anyone within the boundary can receive a second degree burn and therefore must wear the appropriate protective clothing and equipment for the task Limited Approach Boundary This is a shock protection boundary which should not be crossed by an unqualified person unless escort by a qualified individual Restricted Approach Boundary This is a shock protection boundary that can only be crossed by a qualified person. Within this boundary, shock protection techniques and equipment must be used.

3 Procedure No.: BMEHS Page: 3 of Prohibited Approach Boundary This is a shock protection boundary that can only be crossed by a qualified person. Crossing this boundary is considered the same as making contact with the energized equipment. The body part or object that crosses this boundary must be protected from direct contact with the energized equipment. 2.3 Energized Electrical equipment containing components which are electrically charged. This includes both insulated and non-insulated apparatus, terminals, lugs, stabs, fuse clips, bus, wire, etc. 2.4 Exposed - Non-insulated energized electrical equipment located such that an individual could accidentally come in contact via any body part or tool. 2.5 Flame Resistant (FR) The property of a material whereby combustion is terminated or inhibited following the application of a flame. 2.6 Qualified Electrical Worker- One who has skills and knowledge related to the construction and operation of the electrical equipment and is trained to recognize and avoid the electrical hazards that might be present. Such persons shall also be familiar with the proper use of the special precautionary techniques, personal protective equipment, including arc-flash, insulating and shielding materials, and insulated tools and test equipment. A person can be considered qualified with respect to certain equipment and methods but still be considered unqualified for others. 2.7 Qualified Individual One who has skills and knowledge related to the construction and operation of the electrical equipment and installations and has received safety training on the hazards involved

4 Procedure No.: BMEHS Page: 4 of SCOPE Exception 3.1 The preferred method for working on or near electrical equipment to which an employee might be exposed to live parts is to put the equipment into an electrically safe work condition. When it is demonstrated that de-energizing introduces additional or increased hazards or is infeasible due to equipment design or operational limitations, then the work to be performed shall be considered energized electrical work and shall be performed by written permit only. 3.2 This procedure applies to all employees, including contractors, in either of the following situations: Where a part of a worker's body could come in direct contact with energized electrical equipment operating at 50 volts or more to ground When a part of a worker s body is located within the Flash Protection Boundary created while operating electrical switches (i.e. circuit breakers, disconnects, MCC buckets ). Work performed on or near live parts by qualified persons related to tasks such as testing, troubleshooting, voltage measuring, etc., can be performed without an Energized Electrical Repair Work Permit provided pre-job briefing and planning is preformed and appropriate safe work practices and personal protective equipment are provided and used. 4. PROCEDURE 4.1 The following steps shall be used when working on or near exposed, energized equipment Ensure the task to be performed must be done live because either: De-energizing the equipment introduces increased hazards (life support equipment, emergency systems, ventilation, lighting ) or The task is infeasible due to equipment design (diagnostics and testing ) Determine the appropriate Protection Boundaries Ensure personnel meet qualifications Ensure PPE requirements are met Ensure approvals are satisfied Ensure individuals involved in task have completed training Complete the Job Briefing and Planning Checklist Obtain Electrical Energized Repair Work Permit approval (Attachment A).

5 Procedure No.: BMEHS Page: 5 of Protection Boundaries The following protection boundaries shall be used unless specifically posted otherwise at the work location. Shock Protection Boundaries Nominal Voltage Flash Protection Boundary Requires FR Limited Approach Boundary Qualified Escort Restricted Approach Boundary Prohibited Approach Boundary (Ph-Ph) Clothing Required Qualified Personnel Only Not Applicable 3 ft 6 in Avoid Contact Avoid Contact ft 6 in Avoid Contact Avoid Contact ft 6 in 1 ft 1 in 4, ft 2 ft 2 in 7 in 13, ft 2 ft 2 in 7 in 34, ft 2 ft 7 in 10 in The flash protection boundry is not reduced by an enclosure unless it is explosion proof rated. One implication of this is that PPE must be worn to operate a breaker even if the door remains closed. 4.3 Qualifications Only Qualified Individuals shall work within the protection boundaries and shall be trained and knowledgeable of the construction and operation of equipment or a specific work method and be trained to recognize and avoid the electrical hazards that might be present with respect to that equipment or work method. 4.4 PPE Requirements Appropriate PPE shall be required when working within any Shock or Flash Protection Boundary General PPE Each switchgear (480V or greater) is equipped with a label listing the minimum protective clothing to be worn when performing various electrical tasks. The labels are titled WARNING Arc Flash Hazard. These labels were developed as a tool to help the site comply with NFPA 70E Arc Flash Electrical Shock Hazard identification/communication requirements. The PPE requirements presented on each label are a starting point for providing general direction on safety requirements each job carries its own specific risks and additional safety measures may supplement these requirements Flash Protection PPE PPE for flash protection is stored/managed and can be obtained at the BASF Maintenance-I/E shop.

6 Procedure No.: BMEHS Page: 6 of 10 Reviewed: 11/11 Effective: 9/01/08 Supersedes: NEW Shock Protection PPE PPE for shock protection is also available. Sections of rubber mats are installed in front of the switchgear and motor control centers. In addition, rubber gloves of various voltage ratings, rubber blankets, and voltage rated tools are located at the BASF Maintenance-I/E shop. 4.5 Care and Testing of Electrical PPE PPE for electrical work shall be inspected before each use. In addition, the equipment shall be inspected immediately after any incident that could cause it damage. Electrical PPE shall be replaced if there is a hole, tear, cut, or punch, there is ozone deterioration, an object has become embedded in the rubber, or there are texture changes such as softening, hardening, swelling, stickiness, or loss of elasticity Electrical PPE shall be tested in accordance with the schedules set forth in OSHA Std (Electrical Protective Devices). 4.6 Energized Electrical Repair Work Permit and Approvals When energized electrical repair work is required Engineering, Maintenance, Operations and Safety shall discuss and agree to the job prior to the start of any work. At least two qualified BASF Electricians and the Site Electrical Engineer must review the job, in person, to determine that all appropriate safety precautions are in place An Energized Electrical Repair Work Permit shall be filled out and signed by the appropriate parties. This document shall detail the work and the precautions being used Only Qualified Electrical Workers are permitted to work on equipment that has not been placed in an electrically safe condition. Before this work can take place an Energized Electrical Repair Work Permit must be obtained. A copy of this permit can be found at the end of this procedure.

7 Procedure No.: BMEHS Page: 7 of Training A qualified electrical worker shall be trained in safety-related work practices and procedural requirements as necessary to provide protection from the electrical hazards associated with their respective job or task assignments. Employees shall be trained to identify and understand the relationship between electrical hazards and possible injury Such persons shall, at a minimum, be trained in all of the following: The skills and techniques necessary to distinguish exposed energized parts from other parts of electrical equipment. The skills and techniques necessary to determine the nominal voltage of exposed live parts The approach distances for various voltages as previously discussed in Section 4.2. The decision-making process necessary to determine the degree and extent of the hazard and the job planning necessary to perform the task safely. The program shall instill safety principles and controls The training required by this section shall be classroom or on-the-job type, or a combination of the two. The degree of training provided shall be determined by the risk to the employee. 5. RESPONSIBILITIES 5.1 EHS Site Services and TES Management Responsible for reviewing, maintaining, updating and interpreting this procedure, 5.2 I/E Technician Responsible for filling out the Energized Work Permit the Job Planning and Briefing check list and routing the permit for approval Also responsible for performing the work on the energized equipment or monitoring a contractor performing the work Such employees must also have primary responsibility for adherence to the procedure including identifying deficiencies in it.

8 Procedure No.: BMEHS Page: 8 of RELATED DOCUMENTS BC Personal Protective Equipment BMEHS Control of Hazardous Energy - Lock, Tag, Try OSHA Std Electrical Protective Devices NFPA 70E Standard for Electrical Safety in the Workplace (2004 edition) Attachment A Beaumont Site Energized Electrical Repair Work Permit Attachment B Job Briefing and Planning Checklist Attachment C Example of WARNING Bus Electrical Shock and Flash Hazard Label Part I: TO BE COMPLETED BY REQUESTOR: Job/Work Order Number Description of circuit/equipment/job location: Description of work to be done: Justification of why the circuit/equipment cannot be de-energized or the work deferred until the next scheduled outage: Requestor / Title Date Part II: TO BE COMPLETED BY THE ELECTRICALLY QUALIFIED PERSONS DOING THE WORK: Check when Complete Detailed job description procedure to be used in performing the above work: Description of the Safe Work Practices to be employed: Results of the Shock Hazard Analysis available: Determination of Shock Protection Boundaries established: Results of the Flash Hazard Analysis available: Determination of the Flash Protection Boundary established: Necessary Personal Protective Equipment to safely perform the task available: Means employed to restrict the access of unqualified persons from the work area:

9 ATTACHMENT A Job Briefing completed including discussion of any job-related hazards: Do you agree the above described work can be done safely? ( If no, return to requestor) Yes Yes No N Electrically Qualified Person Date Part III: APPROVALS TO PERFORM THE WORK WHILE ELECTRICALLY ENERGIZED: / / Owning Department Manager Date I/E Engineer Date / / EHS Representative Date Maintenance Manager Date

10 ATTACHMENT A Identify The hazards The voltage levels involved Skills required Any foreign (secondary source) voltage source Any unusual work conditions Number of people needed to do the job The shock protection boundaries The available incident energy Potential for arc flash (Conduct a flash-hazard analysis.) Flash protection boundary Ask Can the equipment be de-energized? Are backfeeds of the circuits to be worked on possible? Is a standby person available? Check Job plans Single-line diagrams and vendor prints Status board Information on plant and vendor resources is up to date Safety procedures Vendor information Individuals are familiar with the facility Know What the job is Who else needs to know Communicate! Who is in charge Think About the unexpected event... What if? Lock Tag Test Try Test for voltage FIRST Use the right tools and equipment, including PPE Install and remove grounds Install barriers and barricades What else...? Prepare for an emergency Is the standby person CPR trained? Is the required emergency equipment available? Where is it? Where is the nearest telephone? Where is the fire alarm? Is confined space rescue available? What is the exact work location? How is the equipment shut off in an emergency? Are the emergency telephone numbers known? Where is the fire extinguisher? Are radio communications available?