RFP_1100_LLM3009_ATT_8_v1.pdf

AE ESSENTIAL RECORD

City of Austin- Austin Energy

Effective Date: 8/27/2014 Document #: GWP-2014-0003

Guidelines and Work Processes © Austin Energy – All Rights Reserved For AE Internal Distribution Only

Uncontrolled when downloaded or printed

Austin Energy Safety GWP

Title: Arc Flash Work Procedures Workgroup: OH&S

Document #: GWP-2014-0003 Revision No.: 2.0

GWP Owner: Manger, Occupational Health & Safety

Review Owner: Manager, Occupational Health & Safety

GWP Author(s): Keith Perkins, Randy Payne SME(s): Randy Payne, Wendy Ellen

Last Review Date: 1/2/2025 Next Review Date: 1/2/2027

Table of Contents

DESCRIPTION

DEFINITIONS

SCOPE

ROLES/RESPONSIBILITIES

FACESHIELD REQUIREMENTS

TABLE 1 – AR Faceshield Requirements per Job Scope/Conditions

PPE CATEGORY TABLE

TABLE 2 – Arc-rated Garment Requirements for Personal Protective Equipment Categories

(NFPA 70E)

TABLE 3 - Additional PPE Requirements to Satisfy PPE Categories

GENERAL REQUIREMENTS

ELECTRIC SYSTEM FIELD OPERATIONS-SPECIFIC REQUIREMENTS

REVENUE MEASUREMENT-SPECIFIC REQUIREMENTS

ARC-RATED PROTECTION WITH DESIGN SPECIFICATIONS

TABLE 4 - Arc-Rated Protection with Design Specifications

RECORDS RETENTION

REVISION HISTORY

REVIEW LOG

APPROVALS

ANNEX A - AR CLOTHING SELF-LAUNDRY CARE AND MAINTENANCE POLICY

AR CLOTHING SPECIFICATIONS

AR CLOTHING SELF-LAUNDRY CARE AND MAINTENANCE POLICY

AR CLOTHING INSPECTION POLICY

Docusign Envelope ID: 90D6C2F4-E3FD-48E0-8EF7-A221720C0428

Effective Date: 8/27/2014 Document #: GWP-2014-0003

Guidelines and Work Processes © Austin Energy – All Rights Reserved For AE Internal Distribution Only

Uncontrolled when downloaded or printed

AR CLOTHING RETIREMENT (DISPOSAL)

ANNEX B - ARC FLASH PPE ARC RATING FOR AC & DC SYSTEMS (a derivative of NFPA 70E)

TABLE 5 – AE Arc-rated PPE Categories for Alternating Current (AC) Systems

TABLE 6 – AE Arc-rated PPE Categories for Direct Current (DC) Systems

ANNEX C - ASSESSING THE WORKPLACE FOR FLAME AND ELECTRIC-ARC HAZARDS

DESCRIPTION

This program provides work policy and procedures for working on or near energized electrical lines/equipment where there is the potential of an Arc Flash/Arc Blast hazard exposure.

Following all requirements provided in this program is the minimum expectation. This program does not limit the opportunity for additional PPE/control measures as determined by other means, including but not limited to:

Supervisor instruction

Job Safety Briefing/ Hazard Assessment entailing themes of de-energization, engineering controls

Consulting Annex B - Arc Flash PPE Categories For AC &DC Systems (NFPA 70e)

Consulting Annex C - Assessing the Workplace for Flame and Electric-Arc Hazards *Note: Willful or reckless failure of Austin Energy employees to comply with this policy may lead to disciplinary action.*

DEFINITIONS

Term Definition

Arc Blast A pressure wave created by the heating, melting, vaporization, and expansion of conducting material and surrounding gases or air.

Arc Flash

Sudden release of electrical energy due to an electrical fault, such as a short circuit or equipment failure, that can result in an explosion of intense heat, light, and pressure; can be considered a short-circuit across an air gap, usually created by accidental contact between live conductors.

Arc Flash Exposure Refers to the potential for personnel to be subjected to the thermal, radiant, chemical, or mechanical hazards associated with the release of energy during an arc flash.

Arc Hazard Assessment/Study

A study that analyzes potential exposure to Arc flash hazards.

The outcome of the study establishes Incident Energy levels, Hazard/Risk Categories, Arc flash Protection Boundary and required level of PPE.

Arc Flash Protection Boundary

A protection boundary established to protect personnel from Arc flash hazards. This boundary is the distance at which an

Effective Date: 8/27/2014 Document #: GWP-2014-0003

Guidelines and Work Processes © Austin Energy – All Rights Reserved unprotected worker can receive a second-degree burn to bare skin.

Arc-rated (AR)

PPE that is rated to withstand arc exposure of a certain Incident Energy [NOTE: common language is to refer to arc-rated clothing as flame resistant (FR); yet please know all AR clothing is FR;

though not all FR clothing is AR].

Austin Energy Standard AR PPE Kit

Austin Energy’s term for the standard PPE rated to 12 cal/cm2 (also referred to as 12 cal) that includes the following:

AR work shirt (Long Sleeved)

AR work pants

Protective Footwear

Gloves and glove type (e.g. leather, voltage-rated) must be determined in the Job Safety Briefing.

Ear canal hearing protection must be worn when working within the Arc Flash Protection Boundary.

Authorized Employee An employee who has the authority to perform specific duties under certain circumstances, or one who is carrying out orders from a responsible authority.

Energized Connected to an energy source or containing residual or stored energy.

Hazard Assessment Process reflecting identification of hazards, determining applicable controls, and assigning responsible parties to verify controls are in place.

Incident Energy The amount of energy impressed on a surface, a certain distance from an energy source, generated during an electrical arc event.

Industrial Task

Any activity conducted by Austin Energy Employees that involve the operation/maintenance of Generation, Transmission, Sub-station, or Underground/Overhead Distribution systems that are owned/leased by the City of Austin or Austin Energy (this includes any system that is deemed essential to the operations of Austin Energy or the City of Austin). Since these activities historically have a potentially higher risk of injury or illness, a Job Safety Briefing is required.

Job Safety Briefing A review of the hazard assessment to identify hazards and controls

Limited Approach Boundary

An approach boundary to protect personnel from shock. A boundary distance is established from an energized part based on system voltage. To enter this boundary, Unqualified Employees must be accompanied by a Qualified Employee and must use PPE.

National Fire Protection Association (NFPA) 70E

Consensus standard that helps employers and workers reduce the hazards workers face during electrical work. It protects

Effective Date: 8/27/2014 Document #: GWP-2014-0003

Guidelines and Work Processes © Austin Energy – All Rights Reserved employees from electrical hazards like shock, arc blasts, explosions, and outside conductors

Personal Protective Equipment (PPE)

Equipment used to protect employees which can include clothing, tools, etc.

Qualified Employee An employee who has successfully demonstrated to management their ability to work on or near energized parts.

Racking The act of inserting or removing a high voltage breaker or motor contactor into or from its switchgear cubicle.

Restricted Approach Boundary

An approach boundary to protect personnel from shock. A boundary distance is established from an energized part based on system voltage. Only Qualified Employees are allowed to enter this boundary.

Switching (electrical) The action(s) taken to operate a mechanical or electronic device that opens, closes, or changes the connections in an electrical circuit.

Testing and Inspection of Energized Lines and

Equipment

Any activity within the minimum approach boundaries where the intent is to contact for taking readings or measurements of electrical equipment with approved test equipment that does not require making any physical change to the equipment.

Unauthorized Employee An employee who has not been given authority to perform specific duties.

Unqualified Employee An employee who has not demonstrated to management their ability to work on or near energized parts.

Working on Energized Lines and Equipment

Any work within the minimum approach boundaries where the intent is to contact for making any physical alteration of electrical equipment such as making or tightening connections, removing or replacing components, etc.

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SCOPE

This program applies to all Austin Energy employees working on or near energized electrical lines/equipment where there is the potential of an Arc Flash/Arc Blast hazard.

ROLES/RESPONSIBILITIES

Management and Supervisor

Enforce AR protection use as required by this program.

Enforce Arc Flash policy and procedure as required by this program.

Employee

Wear AR protection as required by this program.

Follow Arc Flash policy and procedure as required by this program.

Attend training associated with AR protection.

Occupational Health & Safety

Assist supervisors in providing AR protection to employees.

Provide training on AR protection application.

Receive feedback on faceshield requirements to determine future application.

Review this program every 2 years for accuracy with regulation updates.

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FACESHIELD REQUIREMENTS

Please see Table 1 below for faceshield requirements and exemption allowances.

TABLE 1 – AR Faceshield Requirements per Job Scope/Conditions

Job Scope/ Conditions (in energized state)

Faceshield and other PPE requirements

Faceshield Exemption Allowances per the qualifications below

Working on energized lines on steel poles without securely installed coverup.

Any work performed without coverup installed (this includes installing coverup) shall be done wearing a faceshield and all other required PPE.

Verify coverup is correctly and securely installed in necessary locations before removing faceshield.

Working within 8 feet of overhead lightning arrestors.

Energizing or de-energizing capacitor banks when 8 feet or less.

Making or breaking load (overhead and underground) when 8 feet or less.

Energizing or de-energizing a primary device when within 8ft.

Using an 8ft live line tool (or shorter) requires the use of a faceshield and all other required PPE.

If live line tool longer than 8 feet is used (e.g. 10ft Extendo stick), faceshield is not required.

The potential to make or break load while using mechanical jumpers and load busters, separating and tying circuits, or cutting in floaters and double deadends.

Working on energized secondary services (overhead or underground), especially, parallel.

Removing or installing meters in energized meter sockets/cans (all voltage ratings).

Working near energized live-front equipment. Determine “near” through Job Safety Briefing (JSB) discussion.**

Faceshield shall be worn with all other required

PPE.

No exemptions.

* Removal of faceshield is allowed if and only if the exemption allowances are fulfilled in the right column. (Footnotes continue on next page)

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** Nearby energized live-front equipment must be identified on the JSB and an evaluation of the potential risk for arc flash be discussed. PPE determination shall be noted on the JSB with justification.

NOTE: Table 1 does not list all required PPE for these job scenarios. Please follow all PPE requirements provided in established pre-identified practices and in Austin Energy GWPs; this includes wearing in-canal hearing protection when wearing faceshield.

When the above constraints cannot be followed, the Supervisor, Crew Leader or Employee in Charge will determine how to conduct the work using their best professional judgement. If the alternative process will not provide the employee(s) exposed to the hazard the same level of protection the faceshield offers, the work will not proceed.

Effective Date: 8/27/2014 Document #: GWP-2014-0003

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PPE CATEGORY TABLE

Per the table below, respective PPE must be worn when working in environments that yield the corresponding Incident Energies.

TABLE 2 – Arc-rated Garment Requirements for Personal Protective Equipment Categories

(NFPA 70E)

Required Minimum

PPE Category

Clothing Description

Arc Rating of PPE Cal/cm2

1* AR shirt and AR pants or AR coverall 4*

2* Cotton underwear – conventional long-sleeve and briefs/shorts, plus AR shirt and AR pants or AR coverall

8*

3 Cotton underwear plus AR shirt and AR pants plus AR coverall; or cotton underwear plus two AR coveralls

4 Cotton underwear plus AR shirt and AR pants or AR coveralls plus multilayer flash suit

*Austin Energy requires minimum 12cal clothing.

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TABLE 3 - Additional PPE Requirements to Satisfy PPE Categories

Table Note: X = Required AN = As Needed

Additional PPE Required for

PPE Risk Categories

Cat 1 Cat 2 Cat 3 Cat 4

Safety toe footwear rated ANSI Z41 EH

X X X X

Safety glasses rated

ANSI Z87.1

X X X X

Leather gloves (free of grease or oils)

X X X X

Hard hat ANSI Z89.1 (Class E); (two-layer flash suit hood meets this requirement).

X X X X

Two-layer flash suit hood

AN

(12 Cal/cm2)

X (25 Cal/cm2)

X (40 Cal/cm2)

Hearing protection (In canal inserts)

X X X

Flash suit (jacket and pants, multilayer)

X

Voltage-rated gloves with leather protectors free of grease, oils or other flammable materials.

AN AN X X

Jacket, parka, or rainwear (made from AR material) as needed

AN AN AN AN

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GENERAL REQUIREMENTS

ARC FLASH EXPOSURE INCIDENTS—Immediately following an incident in which an employee witnesses an arc flash incident and is in close enough proximity to be affected by the hazards resulting from the incident (such as heat, light, or debris), Emergency Services (911) must be called, and the employee shall be evaluated.

Austin Energy minimum arc rating is 12 cal/cm2 (also referred to as 12 cal). As such, utility-wide Austin Energy Standard AR PPE Kit must be rated to minimum 12 cal and includes the following list of required PPE:

AR work shirt (Long Sleeved)

AR work pants

Non-melting Protective Footwear

Gloves and glove type (e.g. leather, voltage-rated) must be determined in the Job Safety Briefing.

Ear canal hearing protection must be worn when working within Arc Flash Protection Boundary.

Note: All undergarments worn beneath AR clothing must be made of either natural fibers that do not melt or from arc-rated material. Undergarments made of untreated polyesters, nylon or poly-cotton blend are not allowed. Additionally, clothing laundry and maintenance requirements presented in Annex A (AR Clothing Self-Laundry Care and Maintenance Policy) must be followed.

o An AR face shield must be worn per the requirements in Table 1.

o Any other PPE, including winter wear and traffic vests, must be arc-rated.

o Other than substations, if the employee enters any worksite (including Power and Chiller

Plants) and comes within 10 feet of any electrical lines or equipment with open panels or exposed energized parts, employee must wear PPE rated to at least 12 cal protection. For substations, employees must follow the specifications provided in the Austin Energy Substation Entry/Exit GWP.

o For PPE exceptions, New Personal Protective Equipment Request form with supporting Hazard Assessment approved by the Director (or designee) must be completed.

o All employees must follow all Task Restrictions applicable to their work group/ work environment.

o Before any Industrial Task, personnel must conduct a Job Safety Briefing; all personnel involved will discuss any potential hazards and mitigations.

o Lock-Out Tag-Out must be followed in accordance with Austin Energy Control of Hazardous Energy Program.

o Electrical Equipment must be maintained by Qualified Employees. All working distances and clearances must be maintained. Access to working space and escape passages must be kept clear and unobstructed.

o If unexpected hazards are encountered, work must be halted until a mitigation plan is developed, approved, and documented on the Job Safety Briefing.

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o Work on energized equipment requires completion of Hazard Assessment approved by

Supervisor (or designee); NOTE: Power Production should make every attempt to work on equipment in a de-energized state.

Employees whose assigned duties are to maintain the Distribution, Transmission, Substation and Network systems of Austin Energy are exempt from mandatory compliance with points 1-3 below.

1. Before working on equipment and circuits operating at or over 50 volts, which cannot be brought to an electrically safe state, an Energized Electrical Work Permit (consult OH&S for a copy of the permit) must be completed. A Job Safety Briefing must also be conducted prior to the work.

2. An Energized Electrical Work Permit is not required on troubleshooting/diagnostic and testing work, or for electrical switching performed with a written switching procedure.

All protective clothing and PPE must still be worn based on the hazards present.

3. During emergency conditions, situations or large-scale rehabilitation projects, an Energized Electrical Work Permit is not required. A supervisor’s verbal permission to perform energized work is required during these conditions or situations and must be documented. In the case of a large-scale outage, this documentation can be accomplished on the Job Safety Briefing.

o Contractors:

All contractors/parties involved must be informed of the equipment being serviced.

Austin Energy is responsible for making contractors aware of all known hazards associated with their assigned work.

o Within Power Generation, Qualified and Authorized personnel must don appropriate Arc Flash suits (min Arc Rating 40cal) when working on energized equipment that:

is either 2400 V or higher OR designated/labeled as such requiring Arc Flash suits.

o All personnel must be aware of Arc Flash Protection Boundary, Limited Approach, and

Restricted Approach Boundaries (consult Tables 130.4(E)(a) & 130.4(E)(b) of NFPA 70E for more information on Limited & Restricted Approach Boundaries for alternating- & direct-current [AC & DC] systems}.

Only Qualified and Authorized Persons shall be permitted to work on or near energized equipment within the Limited Approach Boundary.

Only Qualified Employees shall be permitted to work on or near energized equipment within the Restricted Approach Boundary.

Note: Though Tables 130.4(E)(a) & 130.4(E)(b) of NFPA 70E may be consulted, employees whose assigned duties are to maintain the Distribution, Transmission, Substation and Network systems of Austin Energy are exempt from mandatory compliance with the information provided in said tables.

o Annex B – Arc Flash PPE Categories for AC & DC Systems must be consulted to determine Arc Flash Protection Boundary distance and PPE category based on equipment (source:

Tables 130.7(15)(a) & 130.7(15)(b) of NFPA 70E). AR clothing and PPE (of the corresponding PPE category provided in Tables 2&3) must be worn when working within the arc flash

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Note: Though Tables 130.7(15)(a) & 130.7(15)(b) of NFPA 70E may be consulted, employees whose assigned duties are to maintain the Distribution, Transmission, Substation and Network systems of Austin Energy are exempt from mandatory compliance with the information provided in said tables.

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ELECTRIC SYSTEM FIELD OPERATIONS-SPECIFIC REQUIREMENTS

This Electric System Field Operations-Specific Requirements subsection applies to all personnel supporting Electric System Field Operations.

o Only personnel defined as Qualified per the Task Restrictions for Electric Service Field

Operations Employees Exposed to Energized Lines and Equipment and/or Exposed to Flames or Electrical Arcs GWP must perform any energized work on the Austin Energy Transmission & Distribution (T&D) system.

o Additional general requirements while working anywhere on the Austin Energy T&D system are:

Voltage-rated Gloves must be worn when testing or working on energized lines or equipment.

Class 0 gloves (at a minimum) must be worn while working on systems from 51V to 480V.

Class 2 gloves must be worn while working on systems >480V.

Special precautions must be taken when performing inspections, testing, and working on equipment energized between 251V and 600V.

Racking breakers in or out of any medium voltage energized switchgear requires PPE rated at 40 cal.

NOTE: For Transmission work only, voltage rated gloves will not be a required PPE item while performing work using an approved and appropriately sized live line tool. The tool must be stored, maintained, and tested per the manufacture's recommendations.

Work performed in the Electric Service Field Operations (ESFO) Network area (includes network vaults, manholes, handholes, pad-mounted switchgear, and substation switchgear) requires the following:

o Hard hat, safety glasses, and Austin Energy Standard AR PPE Kit must be used when employees are:

Performing inspections

Removal/replacement of energized equipment.

o Typical tasks include changing out network protectors (while removing hot jumpers).

o Connecting a 216V service.

o Special precautions must be taken when working on equipment energized between 251V and 600V.

If so equipped, the network protector ARMS system must be engaged while performing network work. After the work is completed, the ARMS must be set back to normal.

Any single-phase work on the three-phase 480V system while energized, such as connecting a new service one single-phase at a time, requires the use of Class 0 Voltage-rated gloves, a hard hat, safety glasses, and the Austin Energy Standard AR

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PPE Kit.

Racking breakers in or out of any medium voltage energized switchgear requires AR PPE rated at 40 cal.

Any other work performed on the three-phase service while energized, such as removing a network protector for maintenance, requires the use of AR PPE rated at 40 cal.

Energized work requires a minimum of two Qualified Employees or as specified in the Task Restrictions for Electric Service Field Operations Employees Exposed to Energized Lines and Equipment and/or Exposed to Flames or Electrical Arcs GWP.

o No equipment over 600V with exposed energized surfaces must be worked on while energized. Work that may be performed while energized are limited to tasks such as observation or operation of metal enclosed gear. Hard hat, safety glasses, and the Austin Energy Standard AR PPE Kit is required while operating pad-mounted switches.

Work performed in the Electric System Field Operations Distribution Metering areas requires the following:

o Special precautions must be taken when working on equipment between 251V – 600V three-phase:

Service must be de-energized prior to setting or removing meters.

Any exceptions where work is performed while energized on self-contained service or on secondary service conductors requires the use of AR PPE rated at 40 cal.

Energized work requires a minimum of two Qualified Employees or as specified in the Task Restrictions for Electric Service Field Operations Employees Exposed to Energized Lines and Equipment and/or Exposed to Flames or Electrical Arcs GWP.

o Underground or enclosed metering equipment above 600V must not be worked on while energized. PPE requirements for remote meter socket work for primary metering must be determined by the voltage present in the meter socket or test switch.

o Overhead metering equipment must be worked on by only Qualified Employees.

Work performed in the ESD Transmission and Substation areas requires the following:

o Class 2 Voltage-rated Gloves must be worn during the following activities:

Switching

Grounding

Other tasks determined by the Job Safety Briefing

NOTE: For Transmission work only, voltage rated gloves will not be a required PPE item while performing work using an approved and appropriately sized live line tool. The tool must be stored, maintained, and tested per the manufacture's recommendations.

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Refer to the Substation Entry/Exit for AE employees GWP for further information regarding Arc

Flash protection while working in substation.

REVENUE MEASUREMENT-SPECIFIC REQUIREMENTS

This Revenue Measurement-Specific Requirements subsection applies to all personnel supporting Revenue Measurement.

Work performed by Revenue Measurement in an Arc Flash Boundary requires the following:

All Revenue Measurement & Control (RMC) Service Representatives (Field Services, Meter Maintenance & Current Diversion) will follow the outlines stated in the new

Austin Energy Employee Safety Handbook.

Approach distances shall be maintained regarding energized equipment (Residential and

Commercial Meter Service) In Accordance With (IAW) the Austin Energy Employee

Safety Handbook.

The strict adherence to the utilization of Personal Protective Equipment (PPE) will be followed when conducting any “Hot Work” within an Arc Flash Boundary.

PPE listed below will comply with TABLE 4 - Arc-Rated Protection with Design Specifications found in this document.

PPE will Include: Safety Vest, Safety Glasses, Arc Flash rated Face Shield, Safety toe boots, Class 0 Gloves (600Volts or less) with leather protectors, Class E Hard Hat, and a communication device that can be used to summon emergency help if needed.

1. When working on a residential electric meter service of 240 Volts, 1 phase, PPE shall be worn, including the Arc Flash-rated Face Shield, when removing and reinstalling the meter.

2. When exposed to an Arc Flash:

a. Emergency Services (911) will be notified by any communication device available to the Meter Service Representative (MSR).

b. Notify their Direct Lead and or Supervisor of the arc flash incident.

c. If the MSR is transported for further evaluation by a Licensed Healthcare

Facility/Professional the Direct Lead/Supervisor will take charge of the of the incident scene.

d. If the responding EMS Technician states that medical attention is not needed, MSR will create a Diversion (ADIVR) for documenting purposes, contact their Direct Lead and or Supervisor for guidance, and if possible, the resident where the meter is located.

e. The un-injured MSR or Direct Lead/Supervisor will remain onsite to keep the area safe and secure. They will reach out to RMC Dispatch to contact RMC’s

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Current Diversion Team. The Current Diversion Team will send the nearest

Current Diversion Member to assist in further action to make the scene safe.

3. When working 480 Volts 3 phase (Commercial Service) MSRs will only re-connect and disconnect if outside breaker or line side disconnect is present. Field Activity

(FA) Report will be worked at breaker or disconnect, and the report will be completed prior to leaving the scene.

a. If an outside breaker or line side disconnect is not present, MSR will create an ADIVR to be sent to Commercial Services for a Field Activity report to be worked.

ARC-RATED PROTECTION WITH DESIGN SPECIFICATIONS

For list of Austin Energy-approved AR Protection, see Table 4 below.

TABLE 4 - Arc-Rated Protection with Design Specifications

PPE Design Specifications

AR Traffic Vests

Must be arc‐rated with no minimum rating and meet the requirements of ASTM F1506, ANSI 107 and meet the visibility requirements of ANSI Class 2 (High Visibility Yellow green).

AR Work Pants

AR Work Pants must be made of material with an arc rating of 12 cal/cm2 or greater and meet ASTM F1506 and NFPA 2112. AR Work Pants must be a blue cotton denim material and contain a tag on the outside of the garment displaying the garment’s AR qualities.

AR Work Shirt

Consists of long-sleeve shirts, either dress or pullover style, with a minimum arc rating of 12 cal/cm2. AR Work Shirts must meet the requirements of ASTM F1506 and NFPA 2112.

AR work shirt must contain a tag on the outside of the garment displaying the garment’s AR qualities.

Coveralls

Insulated or uninsulated must be made of material, with an arc rating of 12 cal/cm2 or greater and meet ASTM F1506 and NFPA 2112. For garments under the coveralls, follow the undergarments safety specifications mentioned below.

Normal non-synthetic material work clothing is considered an undergarment when worn under coveralls. AR coverall must contain a tag on the outside of the garment displaying the garment’s AR qualities.

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Face Shields (Arc-rated)

Must meet the requirements of ANSI Z87.1 and must have a minimum arc‐rating to match or exceed the expected Arc Flash energy release.

Flash Hood

PPE Class 4, 40 cal/cm2 Arc Flash Hood that meets the requirements of ANSI/ISEA Z87.1; ASTM F2178; CSA Z462;

NFPA 70E; OSHA 1910.269.

Flash Suits

Must be coveralls or two (2) piece flash suit arc-rated at 40 cal/cm2 or higher, including the Flash Hood.

Havelock and head cooling garments

Must be of natural fibers which do not melt or are arc‐ rated.

Non-Melting Safety Toe Footwear

Protective boots must be made of leather or other non-melting material.

Protective Footwear must also comply with American Society for Testing and Materials (ASTM) Standard F2413‐18 (Standard Specification for Performance Requirements for Protective (Safety) Toe Cap Footwear) or current compliant version (“ASTM F2413”).

Other hazards will dictate features such as puncture‐ resistant soles (if exposed to sharp objects which may penetrate the sole), leather construction (per NFPA 70 E for electrical arc hazard), chemical resistance (if exposed to chemical hazards), lace‐up, etc.

A defined heel is recommended for job functions requiring frequent ladder usage and/or working off ladders.

Rainwear (Arc-rated)

If worn as an outer garment over the current 12 cal/cm2 system must be arc‐rated material of 5 cal/cm² minimum.

Wet weather garments must meet the requirements of ASTM 1891 and NFPA 2112; garments must be High Visibility Yellow or Yellow green.

Undergarments

When worn beneath arc‐rated apparel must be made of natural fibers that do not melt. 100% wool, silk or cotton undergarments are acceptable, but undergarments made of polyesters, nylon or poly‐cotton blend are not permitted unless arc‐rated and meet the requirements of ASTM

F1506. Socks must also be of non‐melting materials or arc-rated. Wool socks and cotton socks with limited elastic are acceptable when worn with flame-resistant garments.

Winter Wear If worn as an outer garment over the current 12 cal/cm2 system, must have an arc rating of 5 cal/cm² minimum.

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Winter Wear must meet the requirements of ASTM F1506 and NFPA 2112; winter wear must contain a tag on the outside of the garment displaying the garment’s AR qualities.

RECORDS RETENTION

Refer to the Austin Energy Records Control Schedule, your office Information Liaison, or contact the Austin Energy Records & Information Management team at Austin EnergyRIM@austinenergy.com for guidance on retention or disposition of records associated with this GWP.

mailto:AERIM@austinenergy.com mailto:AERIM@austinenergy.com

Effective Date: 8/27/2014 Document #: GWP-2014-0003

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REVISION HISTORY

Revision Date Revised By Revisions Made

1.0 8-27-2014 Clayton Stice original

2.0 7-10-24 Keith Perkins, Randy Payne

Updated template updated procedures;

incorporated faceshield requirement table;

incorporated NFPA 70E arc flash protection boundary tables

REVIEW LOG

Date Reviewed By Reviewer’s Title

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APPROVALS

GWP Owner

Printed Name: Wendy Ellen

Signature:

Title: AE Occupational Health & Safety Manager Date:

Records & Information Management

Printed Name: Brock Carter

Signature:

Title: Director, Corporate Compliance Programs

Date:

1/30/2025

2/20/2025

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ANNEX A - AR CLOTHING SELF-LAUNDRY CARE AND MAINTENANCE POLICY

AR CLOTHING SPECIFICATIONS

AR clothing must NOT be worn if there are holes, rips or tears or if flammable materials are present on the outer surface.

AR shirts must be completely buttoned with the sleeves rolled down.

AR CLOTHING SELF-LAUNDRY CARE AND MAINTENANCE POLICY

To maintain the AR protective properties, employees should:

Wash AR clothing in warm water. For heavily soiled garments, wash in the warmest temperature allowed on the care label.

Use small wash loads to help reduce wear and allow better cleaning.

Wash AR clothing separate from everyday clothing. Wash AR clothing inside out.

Tumble dry on low or permanent press. Drying a piece of clothing on high heat can shrink the item.

Remove from dryer when damp or line-dry to minimize shrinking. Garment shrinking often takes place within the first five washings.

Dry-cleaning is recommended for difficult stains. Or try spot-treating stains with detergent before washing.

Do Not Use:

Liquid chlorine bleach

Fabric softener

Detergent with fabric softener

AR CLOTHING INSPECTION POLICY

During inspection, employees should retire clothing upon seeing any of the following indications:

Frayed collar

Frayed cuffs

Torn, open or frayed seams

Threadbare areas

Unrepaired hole 1 inch or greater in diameter

Oil stains that cannot be laundered out

Effective Date: 8/27/2014 Document #: GWP-2014-0003

Guidelines and Work Processes © Austin Energy – All Rights Reserved

If exposed to flame or electric arc, stains could ignite and continue to burn. Regarding Arc Flash protection, realize normal wear and tear of the AR clothing doesn’t necessarily result in a lower arc rating.

AR CLOTHING RETIREMENT (DISPOSAL)

Damaged or expired AR clothing must be rendered unusable with the Austin Energy logo removed.

Effective Date: 8/27/2014 Document #: GWP-2014-0003

Guidelines and Work Processes © Austin Energy – All Rights Reserved

ANNEX B - ARC FLASH PPE ARC RATING FOR AC & DC SYSTEMS (a derivative of

NFPA 70E)

Source: Tables 130.7(15)(a) & 130.7(15)(b) of NFPA 70E

TABLE 5 – AE Arc-rated PPE Categories for Alternating Current (AC) Systems NOTE: Austin Energy’s minimum arc protection level is 12 cal/cm2.

Equipment Parameters Arc flash

Boundary

Arc flash

PPE Category

Panelboards or other equipment rated 240 volts and below.

Maximum of 25 kA available fault current; maximum of 0.03 sec (2 cycles) fault clearing time; minimum working distance 18 in.

19 in. 1

Panelboards or other equipment rated greater than 240 volts and up to 600 volts.

Maximum of 25 kA available fault current; maximum of 0.03 sec (2 cycles) fault clearing time; minimum working distance 18 in.

3 ft 2

600-volt class motor control centers (MCCs).

Maximum of 65 kA available fault current; maximum of 0.03 sec (2 cycles) fault clearing time; minimum working distance 18 in.

5 ft 2

600-volt class motor control centers (MCCs).

Maximum of 42 kA available fault current; maximum of 0.33 sec (20 cycles) fault clearing time; minimum working distance 18 in.

14 ft 4

600-volt class switchgear

(with power circuit breakers or fused switches) and 600-volt class switchboards.

Maximum of 35 kA available fault current; maximum of up to 0.5 sec (30 cycles) fault clearing time; minimum working distance 18 in.

20 ft 4

Other 600-volt class (277 volts through 600 volts, nominal) equipment.

Maximum of 65 kA available fault current; maximum of 0.03 sec (2 cycles) fault clearing time; minimum working distance 18 in.

5 ft 2

NEMA E2 (fused contactor) motor starters, 2.3 kV through 7.2 kV.

Maximum of 35 kA available fault current; maximum of up to 0.24 sec (15 cycles) fault clearing time; minimum working distance 36 in.

40 ft 4

Metal-clad switchgear, 1 kV through 15 kV.

Maximum of 35 kA available fault current; maximum of up to 0.24 sec (15

40 ft 4

Effective Date: 8/27/2014 Document #: GWP-2014-0003

Guidelines and Work Processes © Austin Energy – All Rights Reserved cycles) fault clearing time; minimum working distance 36 in.

Arc-resistant switchgear 1 kV through 15 kV [for clearing times of less than 0.5 sec (30 cycles) with an available fault current not to exceed the arc-resistant rating of the equipment], and metal-enclosed interrupter switchgear, fused or unfused of arc-resistant-type construction, 1 kV through 15 kV.

Maximum of 35 kA available fault current; maximum of up to 0.24 sec (15 cycles) fault clearing time; minimum working distance 36 in.

N/A (doors closed)

40 ft (doors open)

N/A (doors closed)

4 (doors open)

Other equipment 1 kV through 15 kV.

Maximum of 35 kA available fault current; maximum of up to 0.24 sec (15 cycles) fault clearing time; minimum working distance 36 in.

40 ft 4

Note: For equipment rated 600 volts and below and protected by upstream current-limiting fuses or current-limiting circuit breakers sized at 200 amperes or less, the arc flash PPE category can be reduced by one number but not below arc flash PPE Category A.

Informational Note No.1 to Table 130.7(C)(15)(a): The following are typical fault clearing times of overcurrent protective devices:

1. 0.5 cycle fault clearing time is typical for current-limiting fuses when the fault current is within the current limiting range.

2. 1.5 cycle fault clearing time is typical for molded case circuit breakers rated less than 1000 volts with an instantaneous integral trip.

3. 3.0 cycle fault clearing time is typical for insulated case circuit breakers rated less than 1000 volts with an instantaneous integral trip or relay operated trip.

4. 5.0 cycle fault clearing time is typical for relay operated circuit breakers rated 1 kV to 35 kV when the relay operates in the instantaneous range (i.e., "no intentional delay").

5. 20 cycle fault clearing time is typical for low-voltage power and insulated case circuit breakers with a short time fault clearing delay for motor inrush.

6. 30 cycle fault clearing time is typical for low-voltage power and insulated case circuit breakers with a short time fault clearing delay without instantaneous trip.

Informational Note No.2 to Table 130.7(C)(15)(a): See Table 1 of IEEE 1584, Guide for Performing Arc Flash Hazard Calculations, for further information regarding list items 2 through 4 in Informational Note No.1.

Informational Note No.3 to Table 130.7(C)(15)(a): An example of a standard that provides information for arc-resistant switchgear referred to in Table 130.7(C)(15)(a) is IEEE C37.20.7, Guide for Testing Metal-Enclosed Switchgear Rated Up to 52 kV for Internal Arcing Faults.

Informational Note No.4 to Table 130.7(C)(15)(a): See O.2.4(9) of NFPA 70E for information on arc-resistant equipment.

Effective Date: 8/27/2014 Document #: GWP-2014-0003

Guidelines and Work Processes © Austin Energy – All Rights Reserved

TABLE 6 – AE Arc-rated PPE Categories for Direct Current (DC) Systems NOTE: Austin Energy’s minimum arc protection level is 12 cal/cm2.

Equipment Arc flash Boundary

Arc flash PPE Category

Storage batteries, dc switchboards, and other dc supply sources.

Parameters: Greater than or equal to 100 V and less than or equal to 250 V.

Maximum arc duration and minimum working distance: 2 sec @ 18 in.

Available fault current less than 4 kA. 3 ft 2

Available fault current greater than or equal to 4 kA and less than 7 kA.

4 ft 2

Available fault current greater than or equal to 7 kA and less than 15 kA.

6 ft 3

Storage batteries, dc switchboards, and other dc supply sources.

Parameters: Greater than 250 V and less than or equal to 600 V.

Maximum arc duration and minimum working distance: 2 sec @ 18 in.

Available fault current less than 1.5 kA. 3 ft 2

Available fault current greater than or equal to 1.5 kA and less than 3 kA.

4 ft 2

Available fault current greater than or equal to 3 kA and less than 7 kA.

6 ft 3

Available fault current greater than or equal to 7 kA and less than 10 kA.

8 ft 4

Notes

1. Apparel that can be expected to be exposed to electrolyte must meet both of the following conditions:

(a) Be evaluated for electrolyte protection.*

(b) Be arc-rated.**

*Informational Note: ASTM F1296, Standard Guide for Evaluating Chemical Protective Clothing, contains information on evaluating apparel for protection from electrolyte.

** Informational Note: ATSM F1891, Standard Specifications for Arc-rated and Flame Resistant Rainwear, contains information on evaluating arc-rated apparel.

2. A two-second arc duration is assumed if there is no overcurrent protective device (OCPD) or if the fault clearing time is not known. If the fault clearing time is known and is less than 2 seconds, an incident energy analysis could provide a more representative result.

Informational Note No. 1: When determining available fault current, the effects of cables and any other impedances in the circuit should be included. Power system

Effective Date: 8/27/2014 Document #: GWP-2014-0003

Guidelines and Work Processes © Austin Energy – All Rights Reserved modeling is the best method to determine the available short-circuit current at the point of the arc. Battery cell short-circuit current can be obtained from the battery manufacturer. See D.5 for the basis for table values and alternative methods to determine dc incident energy. Methods should be used with good engineering judgement.

Informational Note No. 2: The methods for estimating the dc arc flash incident energy that were used to determine the categories for this table are based on open-air incident energy calculations. Open-air calculations were used because many battery systems and other dc process systems are in open areas or rooms. If the specific task is within an enclosure, it would be prudent to consider additional PPE protection beyond the value shown in this table. Research with ac arc flash has shown a multiplier of as much as 3x for arc-in-a-box [508 mm (20 in.) cube] versus open air.

Engineering judgement is necessary when reviewing the specific conditions of the equipment and task to be performed, including the dimensions of the enclosure and the working distance involved.

Effective Date: 8/27/2014 Document #: GWP-2014-0003

Guidelines and Work Processes © Austin Energy – All Rights Reserved

ANNEX C - ASSESSING THE WORKPLACE FOR FLAME AND ELECTRIC-ARC HAZARDS

The employer must conduct an assessment for each employee who performs work on or near exposed, energized parts of electric circuits. The following factors should be considered when determining areas of potential Arc Flash (source: OSHA 1910.269 Appendix E).

Sources of Electric Arcs - Consider possible sources of electric arcs, including:

o Energized circuit parts not guarded or insulated, o Switching devices that produce electric arcs in normal operation, o Sliding parts that could fault during operation (for example, rack-mounted circuit breakers), and o Energized electric equipment that could fail (for example, electric equipment with damaged insulation or with evidence of arcing or overheating).

Exposure to flames - Identify employees exposed to hazards from flames. Factors to consider include:

o The proximity of employees to open flames, and o For flammable material in the work area, is there a reasonable likelihood that an electric arc or an open flame can ignite the material?

Probability that an electric arc will occur - Identify employees exposed to electric-arc hazards.

Factors to consider include:

o For energized circuit parts not guarded or insulated, whether conductive objects can come too close to or fall onto the energized parts, o For exposed, energized circuit parts, determine whether the employee is closer to the part than the minimum approach distance established by the employer.

o Whether the operation of electric equipment with sliding parts that could fault during operation is part of the normal operation of the equipment or occurs during servicing or maintenance and o For energized electric equipment, whether there is evidence of impending failure, such as evidence of arcing or overheating.