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Working on a live 277/480 panel

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Pre-Task Plan: Working on a Live 277/480 Panel

Date: [DATE] Work Area: [WORK AREA] Task Supervisor: [SUPERVISOR NAME]

1. Task Description

Working on a live 277/480 volt electrical panel, including [SPECIFIC TASKS, e.g., troubleshooting, repairs, or modifications].

2. Task Duration

Estimated Start: [START TIME] Estimated Completion: [END TIME]

3. Personnel Involved

  • [ROLE 1]: Qualified Electrician
  • [ROLE 2]: Assistant/Apprentice
  • [ROLE 3]: Safety Observer (if required)

4. Task-Specific Hazards and Controls

HazardRiskControl Measures
Electrical ShockElectrocution, burnsUse appropriate PPE including voltage-rated gloves and sleeves. Verify proper voltage rating before starting work. Use insulated tools. Maintain minimum approach distances [1].
Arc FlashBurns, eye damage, hearing damageWear appropriate arc-rated PPE (clothing, face shield, gloves). Ensure proper flash protection boundaries are established. De-energize the panel if possible.
Exposure to energized partsElectrocution, burnsOnly qualified persons must work on electric circuit parts or equipment that have not been deenergized [2]. Use insulating and shielding materials [2].
Confined SpaceInadvertent contact with energized partsProvide protective shields, barriers, or insulating materials as necessary to avoid inadvertent contact with these parts [3]. Secure doors and hinged panels to prevent swinging into an employee [3].
Unguarded live partsElectrocution, burnsOnly qualified employees may work in areas containing unguarded, uninsulated energized lines or parts of equipment operating at 50 volts or more [4].

5. Required PPE for Today's Task

  • Voltage-rated gloves and sleeves
  • Arc-rated clothing
  • Arc-rated face shield or safety glasses
  • Insulated tools

6. Tools and Equipment Needed

  • Voltage tester
  • Insulated screwdrivers and pliers
  • Arc flash suit
  • Rubber mat

7. Pre-Start Checklist

Area Preparation

  • [ ] Ensure adequate illumination in the work area [3].
  • [ ] Barricade the work area to prevent unqualified personnel from entering.
  • [ ] Verify the panel is properly labeled and identified [5].

Equipment Checks

  • [ ] Inspect voltage-rated gloves for damage before use.
  • [ ] Test voltage tester for proper function before and after use.
  • [ ] Ensure all tools are properly insulated and in good condition.

Communication

  • [ ] Conduct a pre-task briefing with all personnel involved.
  • [ ] Establish clear communication signals between workers.
  • [ ] Review emergency procedures and contact information.

8. Task Steps Overview

  1. Verify the panel is the correct one for the intended work.
  2. Don appropriate PPE.
  3. Use a voltage tester to confirm the presence of voltage.
  4. Perform the required task, using insulated tools and maintaining safe distances.
  5. Test the completed work to ensure proper function.

9. Emergency Response for This Task

  • Electric Shock → Immediately de-energize the circuit if safe to do so. Call for medical assistance and administer first aid/CPR.
  • Arc Flash → Evacuate the area, call for medical assistance, and administer first aid for burns.

10. Task-Specific Precautions

  • Do not wear conductive jewelry or clothing [3].
  • Use a rubber mat for additional insulation.
  • Maintain situational awareness and avoid distractions.

Pre-Task Briefing Confirmation

All workers understand the task, associated hazards, and required controls.

Team Lead Initials: [___] Date: [DATE] Time: [TIME]

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5 source record(s)

Sources used for this answer

[1] Safety Standards for General Safety and Health Standards (Chaper 296-24 WAC)

Page 483

Open source document

Source excerpt

\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ - (c) Employees standing on the ground must not contact the vehicle or mechanical equipment or any of its attachments, unless: - (i) The employee is using protective equipment rated for the voltage; or - (ii) The equipment is located so that no uninsulated part of its structure (that portion of the structure that provides a conductive path to employees on the ground) can come closer to the line than permitted in this section. - (d) If any vehicle or mechanical equipment capable of having parts of its structure elevated near energized overhead lines is intentionally grounded, employees working on the ground near the point of grounding must not stand at the grounding location whenever there is a possibility of overhead line contact. You must take additional precautions, such as the use of barricades or insulation, to protect employees from hazardous ground potentials, depending on earth resistivity and fault currents, which can develop within the first few feet or more outward from the grounding point. ## (9) Illumination . - (a) Employees must not enter spaces containing exposed energized parts, unless illumination is provided that enables the employees to perform the work safely. - (b) Where lack of illumination or an obstruction precludes observation of the work to be performed, employees must not perform tasks near exposed energized parts. Employees must not reach blindly into areas which may contain energized parts. - (10) Confined or enclosed work spaces . When an employee works in a confined or enclosed space (such as a manhole or vault) that contains exposed energized parts, you must provide, and the employee must use, protective shields, protective barriers, or insulating materials as necessary to avoid inadvertent contact with these parts. Doo…

[2] Rules for the Administration of the Oregon Safe Employment Act (General Occupational Safety and Health, Division 2, OSHA Oregon)

Page 1834

Open source document

Source excerpt

Division 2 AO 2-2017 Oregon Administrative Rules Oregon Occupational Safety and Health Division ## [redacted phone] Working on or near exposed energized parts This rule applies to work on or near exposed live parts. - (1) General. - (a) Only qualified employees may work on or with exposed energized lines or parts of equipment. - (b) Only qualified employees may work in areas containing unguarded, uninsulated energized lines or parts of equipment operating at 50 volts or more. - (c) Electric lines and equipment must be considered and treated as energized unless they have been deenergized in accordance with [redacted phone] Hazardous Energy Control, or [redacted phone], of Division 2/RR. - (2) Two worker rules. - (a) Not fewer than two qualified employees may work on lines or equipment energized at more than 600 volts while performing the following types of work: - (A) Installation, removal, or repair of lines energized at more than 600 volts, - (B) Installation, removal, or repair of deenergized lines if an employee is exposed to contact with other parts energized at more than 600 volts, - (C) Installation, removal, or repair of equipment, such as transformers, capacitors, and regulators, if an employee is exposed to contact with parts energized at more than 600 volts, - (D) Work involving the use of mechanical equipment, other than insulated aerial lifts, near parts energized at more than 600 volts, and - (E) Other work that exposes an employee to electrical hazards greater than, or equal to, the electrical hazards posed by operations listed specifically in paragraphs (2)(a)(A) through (2)(a)(E) of this section. - (b) The following exceptions to the two-worker rule in [redacted phone](2)(a)(A) through (2)(a)(E) apply: - (A) When re-fusing circuits with a live-line tool. - (B) When operating switches by means of operating handles or live-line tools, excluding installation or removal of load break elbows with live line tools, addressed in paragraph (2)(b)(E) of …

[3] Safety Standards for General Safety and Health Standards (Chaper 296-24 WAC)

Page 422

Open source document

Source excerpt

\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ ## Disconnecting means and circuits . - (a) Motors and appliances. You must legibly mark each disconnecting means required by this part for motors and appliances to indicate its purpose, unless located and arranged so the purpose is evident. - (b) Services, feeders, and branch circuits . You must legibly mark each service, feeders, and branch circuits, at its disconnecting means or overcurrent device, to indicate its purpose, unless located and arranged so the purpose if evident. - (c) Durability of markings . The markings required by this section must be of sufficient durability to withstand the environment involved. - (d) Capable of accepting a lock . Disconnecting means required by this part must be capable of being locked in the open position. ## (e) Marking for series combination ratings . - (i) Where circuit breakers or fuses are applied in compliance with the series combination ratings marked on the equipment by the manufacturer, you must legibly mark the equipment enclosures in the field to indicate that the equipment has been applied with a series combination rating. - (ii) The marking required by (e)(i) of this subsection must be readily visible and must state 'Caution--Series Combination System Rated Amperes. Identified Replacement Component Required.' - 600 Volts, nominal, or less . This subsection applies to electric equipment operating at 600 volts, nominal, or less to ground. - (a) Space about electric equipment . You must provide and maintain sufficient access and working space about all electric equipment to permit ready and safe operation and maintenance of such equipment. - (i) Working space for equipment likely to require examination, adjustment, servicing, or maintenance while energized must comply with the following dimensions…

[4] Safety Standards for General Safety and Health Standards (Chaper 296-24 WAC)

Page 481

Open source document

Source excerpt

\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ NMAB 353-3-1980 Classification of Combustible Dusts in Accordance with the National Electrical Code. [Statutory Authority: RCW 49.17.010, .040, .050, and .060. 12-16-064 (Order 12-11), § 296-24-[redacted postal code], filed 07/31/12, effective 09/01/12.] ## WAC 296-24-960 Working on or near exposed energized parts. - (1) Application . This section applies to work performed on exposed live parts (involving either direct contact or contact by means of tools or materials) or near enough to them for employees to be exposed to any hazard they present. - (2) Work on energized equipment . Only qualified persons must work on electric circuit parts or equipment that have not been deenergized under the procedures of WAC 296-[redacted postal code](2). Such persons must be capable of working safely on energized circuits and must be familiar with the proper use of special precautionary techniques, personal protective equipment, insulating and shielding materials, and insulated tools. ## (3) General requirements - high voltage lines . - (a) Minimum clearance . - (i) You must not perform any work, you must not pile, store, or otherwise handle any material, you must not erect or dismantle any scaffolding, commercial signs, or structures, nor must you operate any tools, machinery or equipment within the specified minimum distances from any energized high voltage electrical conductor capable of energizing the material or equipment; except where the electrical distribution and transmission lines have been deenergized and visibly grounded at point of work, or where insulating barriers not a part of or an attachment to the equipment have been erected, to prevent physical contact with the lines, you must operate equipment proximate to, under, over, by, or near powerlin…

[5] Safety Standards for General Safety and Health Standards (Chaper 296-24 WAC)

Page 482

Open source document

Source excerpt

\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ - (5) Overhead lines . If work is to be performed near overhead lines, you must deenergize and ground the lines, or provide other protective measures before work is started. If the lines are to be deenergized, you must make arrangements with the person or organization that operates or controls the electric circuits involved to deenergize and ground them. If protective measures, such as guarding, isolating, or insulating, these precautions must prevent employees from contacting such lines directly with any part of their body or indirectly through conductive materials, tools, or equipment. - (6) Unqualified persons . When an unqualified person is working in an elevated position, or on the ground, near overhead lines, the location must be such that the person and the longest conductive object he or she may contact cannot come closer to any unguarded, energized overhead line than the following distances: - (a) For voltages to ground 50kV or below--10 ft.; - (b) For voltages to ground over 50kV--10 ft. plus 0.4 inch for every 1 kV over 50 kV. - (7) Qualified persons . When a qualified person is working in the vicinity of overhead lines, whether in an elevated position or on the ground, the person must not approach or take any conductive object without an approved insulating handle closer to exposed energized parts than shown in subsections (3) and (4) of this section unless: - (a) The person is insulated from the energized part (gloves, with sleeves if necessary, rated for the voltage involved are considered to be insulation of the person from the energized part on which work is performed); or - (b) The energized part is insulated both from all other conductive objects at a different potential and from the person; or - (c) The person is insulated from all co…

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