12 Aug Electrical Work – JSA

Electrical Work Job Safety Analysis (JSA)

Job / Task

Installation, inspection, troubleshooting, testing, maintenance, repair, alteration, and removal of electrical systems, circuits, equipment, wiring, panels, disconnects, temporary power, and related components.

Purpose

This Job Safety Analysis (JSA), also known as a Job Hazard Analysis (JHA), identifies hazards associated with electrical work and establishes safe work practices and controls to prevent electric shock, electrocution, arc flash, arc blast, burns, fires, explosions, falls, and other electrical-related injuries.

Personnel Qualifications

Electrical work shall be performed only by employees who are trained, qualified, and authorized for the electrical hazards and tasks involved. Unqualified employees shall not perform work on or near exposed energized electrical parts.

Employees shall:

• Understand the electrical system, voltage, available energy, task hazards, and applicable safe work procedures before beginning work.
• De-energize electrical equipment and establish an electrically safe work condition whenever required and feasible.
• Apply lockout/tagout and verify absence of voltage before beginning work on de-energized conductors or circuit parts.
• Perform energized electrical work only when specifically justified, authorized, and permitted by applicable procedures.
• Use properly rated test instruments, insulated tools, PPE, barriers, and protective equipment.
• Observe applicable shock and arc-flash approach boundaries.
• Inspect electrical PPE, tools, cords, meters, and equipment before use.
• Stop work when electrical conditions are unknown, unexpected, or cannot be safely controlled.

Required PPE

PPE shall be selected based on the electrical hazard assessment, voltage, incident energy or PPE category where applicable, task, and work environment and may include:

• Safety glasses with side protection.
• Arc-rated face shield or arc-flash hood where required.
• Arc-rated clothing appropriate for the identified arc-flash hazard.
• Voltage-rated rubber insulating gloves with leather protectors where required.
• Voltage-rated insulating sleeves where required.
• Hard hat appropriate for the electrical exposure.
• Safety footwear appropriate for the work.
• Hearing protection for arc-flash protection where required.
• Insulating mats, blankets, covers, or other protective equipment where required.
• Fall protection where electrical work is performed at elevation.
• Additional task-specific PPE identified by the electrical hazard assessment.

Electrical PPE shall be inspected before use and maintained, tested, and replaced at required intervals. PPE does not replace de-energization, lockout/tagout, guarding, approach boundaries, or other required electrical safety controls.

JSA – Job Steps, Hazards, and Controls

Step 1 – Review the Electrical Work Scope

Potential Hazards

• Unknown voltage or energy source.
• Incorrect circuit identification.
• Unexpected energized components.
• Arc-flash or shock exposure.

Required Controls

• Review drawings, labels, one-line diagrams, equipment information, and the work scope before beginning.
• Identify all electrical and other hazardous energy sources that may affect the task.
• Determine nominal voltage, shock exposure, arc-flash hazard, approach boundaries, and required PPE.
• Conduct a documented job briefing when required.
• Do not proceed when system configuration or hazard information is uncertain.

Step 2 – Inspect the Work Area

Potential Hazards

• Wet conditions.
• Poor lighting.
• Combustible materials.
• Restricted access.
• Trip or fall hazards.

Required Controls

• Keep the work area dry and adequately illuminated.
• Remove or control combustible and conductive materials near electrical work.
• Maintain required working clearances and access to electrical equipment.
• Control pedestrian and unauthorized personnel access.
• Correct slip, trip, and fall hazards before beginning electrical work.

Step 3 – Identify and Isolate Energy Sources

Potential Hazards

• Electric shock.
• Unexpected energization.
• Backfeed.
• Stored electrical or mechanical energy.

Required Controls

• Identify all normal, alternate, emergency, generator, UPS, photovoltaic, battery, control, and possible backfeed sources applicable to the equipment.
• Open disconnecting means necessary to isolate the equipment.
• Release, block, discharge, or otherwise control stored energy as required.
• Do not rely solely on control switches, push buttons, interlocks, or software commands as energy-isolating devices.

Step 4 – Apply Lockout / Tagout

Potential Hazards

• Unexpected startup or energization.
• Incorrect isolation.
• Another employee restoring power.

Required Controls

• Follow the applicable hazardous-energy-control procedure.
• Apply individually assigned locks and tags to required energy-isolating devices.
• Verify the isolation includes all sources capable of energizing the equipment.
• Use group lockout/tagout procedures when multiple employees are involved.
• Do not remove another employee’s lock except under an approved removal procedure.

Step 5 – Verify Absence of Voltage

Potential Hazards

• Contact with energized conductors.
• Defective test instrument.
• Testing wrong points.
• Stored or induced voltage.

Required Controls

• Use an adequately rated and properly functioning test instrument.
• Verify the instrument on a known voltage source before testing when required by the applicable procedure.
• Test all relevant phase-to-phase and phase-to-ground combinations or other points necessary to establish absence of voltage.
• Reverify the test instrument after testing when required.
• Treat conductors and circuit parts as energized until absence of voltage has been verified.

Step 6 – Establish the Electrically Safe Work Condition

Potential Hazards

• Residual electrical energy.
• Induced voltage.
• Unexpected re-energization.
• Contact with adjacent energized parts.

Required Controls

• Complete required lockout/tagout and absence-of-voltage verification.
• Apply temporary protective grounding where required.
• Guard or insulate adjacent energized parts that remain exposed.
• Establish barriers and boundaries as necessary.
• Begin work only after the electrically safe work condition has been established.

Step 7 – Perform Installation or Repair Work

Potential Hazards

• Shock from adjacent energized parts.
• Cuts and punctures.
• Improper connections.
• Dropped tools or components.

Required Controls

• Maintain protection from adjacent energized components.
• Use insulated tools where required.
• Follow approved installation methods and equipment instructions.
• Maintain proper conductor identification, terminations, grounding, bonding, and enclosure integrity.
• Keep conductive objects and unnecessary materials away from exposed electrical parts.

Step 8 – Perform Energized Troubleshooting or Testing

Potential Hazards

• Electric shock.
• Arc flash.
• Arc blast.
• Burns.
• Unexpected equipment movement.

Required Controls

• Limit energized work to tasks that require equipment to remain energized or are otherwise permitted by applicable procedures.
• Only qualified and authorized employees shall perform energized testing or troubleshooting.
• Establish shock and arc-flash boundaries and restrict access accordingly.
• Use rated meters, probes, PPE, insulated tools, and protective barriers appropriate to the hazard.
• Use safe body positioning and avoid unnecessary exposure to energized parts.
• Do not perform energized work when conditions such as water, damaged equipment, or inadequate space create unacceptable risk.

Step 9 – Use Electrical Test Instruments

Potential Hazards

• Meter failure.
• Incorrect meter category or rating.
• Probe contact between phases.
• Shock or arc flash.

Required Controls

• Inspect meters, leads, probes, and accessories before use.
• Use equipment rated for the circuit voltage, environment, and measurement category.
• Select the correct meter function and range before contacting the circuit.
• Keep fingers behind probe guards and maintain stable body position.
• Remove damaged or unreliable test instruments from service.

Step 10 – Work Inside Panels, Switchgear, or Enclosures

Potential Hazards

• Arc flash or blast.
• Contact with exposed energized parts.
• Dropped conductive objects.
• Restricted movement.

Required Controls

• De-energize and establish an electrically safe work condition whenever required and feasible.
• Secure doors, covers, and panels against unexpected movement.
• Remove jewelry and conductive articles that could contact energized components.
• Use barriers or insulating materials to protect against adjacent energized parts.
• Maintain housekeeping and keep loose hardware and tools controlled.

Step 11 – Use Portable Electric Tools and Extension Cords

Potential Hazards

• Damaged insulation.
• Shock.
• Ground-fault exposure.
• Trip hazards.
• Overloaded circuits.

Required Controls

• Inspect tools, plugs, and cords before use.
• Remove damaged electrical equipment from service.
• Use GFCI protection where required.
• Use grounded or double-insulated tools as designed.
• Do not use extension cords as permanent wiring or overload cords and receptacles.
• Protect cords from water, sharp edges, traffic, pinch points, and physical damage.

Step 12 – Work Near Overhead or Exposed Electrical Lines

Potential Hazards

• Electrocution.
• Arc-over.
• Equipment contacting energized lines.
• Worker entering unsafe approach distance.

Required Controls

• Identify overhead and exposed electrical hazards before positioning employees, ladders, tools, vehicles, or equipment.
• Maintain applicable minimum approach distances.
• Use nonconductive ladders where electrical hazards exist.
• De-energize, relocate, guard, or otherwise protect exposed lines when required.
• Use a dedicated spotter when equipment movement near electrical lines requires one.
• Treat lines as energized unless the responsible utility or authorized party confirms and controls de-energization.

Step 13 – Work at Elevation

Potential Hazards

• Fall from ladder or platform.
• Electrical contact causing a fall.
• Dropped tools.

Required Controls

• Use ladders, scaffolds, or aerial lifts appropriate for the task.
• Use nonconductive ladders when exposed electrical hazards are present.
• Maintain required fall protection.
• Do not overreach or position access equipment where electrical contact is possible.
• Secure tools and materials where falling objects could create a hazard.

Step 14 – Restore Guards, Covers, and Enclosures

Potential Hazards

• Exposed energized parts.
• Missing barriers.
• Loose components.
• Improper equipment condition.

Required Controls

• Inspect completed work before re-energization.
• Replace all required covers, dead fronts, barriers, guards, and enclosure hardware.
• Remove tools, jumpers, temporary grounds, test equipment, and foreign materials as appropriate.
• Verify equipment is properly grounded and bonded.
• Do not energize equipment with required protective components missing.

Step 15 – Remove Lockout / Tagout and Re-Energize

Potential Hazards

• Unexpected startup.
• Personnel still exposed.
• Arc flash during switching.
• Equipment malfunction.

Required Controls

• Inspect the area and verify employees are clear of danger zones.
• Confirm tools and temporary protective devices have been removed as appropriate.
• Notify affected employees before restoring energy.
• Remove locks and tags in accordance with the hazardous-energy-control procedure.
• Use appropriate PPE and safe body positioning when operating disconnecting means where an electrical hazard exists.
• Stand clear and observe equipment for abnormal conditions after energization.

Step 16 – Complete and Document the Work

Potential Hazards

• Unreported defects.
• Incorrect labeling.
• Future exposure to unidentified hazards.

Required Controls

• Update labels, drawings, inspection records, or maintenance documentation as required.
• Report damaged equipment, unusual conditions, or unresolved electrical hazards.
• Restore barriers and controlled-access areas to normal condition.
• Leave electrical rooms, panels, and work areas clean and secure.
• Communicate equipment status to affected personnel.

General Safe Work Requirements

• Electrical conductors and circuit parts shall be placed in an electrically safe work condition before work unless energized work is permitted under applicable requirements.
• Only qualified and authorized employees shall work on or near exposed energized electrical conductors or circuit parts.
• Lockout/tagout shall be applied when required before electrical maintenance, repair, or servicing.
• Absence of voltage shall be verified using an adequately rated test instrument before conductors or circuit parts are treated as de-energized.
• Shock and arc-flash hazards shall be assessed and applicable approach boundaries maintained.
• Electrical PPE and protective equipment shall be appropriate for the hazard and inspected before use.
• Electrical tools, meters, extension cords, and temporary power equipment shall be inspected and removed from service when defective.
• Required guards, covers, dead fronts, barriers, and enclosures shall be maintained in place.
• Work areas around electrical equipment shall be kept dry, accessible, and free of unnecessary conductive or combustible materials.
• Work shall stop whenever electrical hazards are unknown, unexpected, or cannot be adequately controlled.

Training

Employees shall receive electrical safety training appropriate to their duties and level of exposure. Training shall include recognition of electrical hazards, qualified and unqualified employee limitations, shock and arc-flash hazards, approach boundaries, lockout/tagout, establishing an electrically safe work condition, test instrument use, PPE, insulated tools, overhead electrical hazards, emergency response, and stop-work expectations. Qualified employees shall receive additional training required for the electrical tasks they perform.

References

• OSHA 29 CFR 1910.147 – The Control of Hazardous Energy (Lockout/Tagout), where applicable.
• OSHA 29 CFR 1910 Subpart S – Electrical, where applicable.
• OSHA 29 CFR 1926 Subpart K – Electrical, where applicable.
• OSHA 29 CFR 1926 Subpart V – Electric Power Transmission and Distribution, where applicable.
• NFPA 70E – Standard for Electrical Safety in the Workplace, current employer-adopted edition, where applicable.
• Applicable manufacturer instructions, electrical safety procedures, and hazardous-energy-control procedures.