Flame Resistant Clothing & Protective Equipment

FR Clothing & Protective Equipment ʹContractor Guideline03-31-2016Version 5Secondary Distribution System FR PPE2As a general rule, 8 cal/cmFR clothingis the minimum. Primary URD–both live front and dead front–may generally be switchedusing live line tools wearing8 cal/cm2 FR PPE. If working within an indoor2facility, such as a vault, non-dead front switching requires 20 cal/cmclothing and arc-rated face shield /balaclava.Due to the number of transformer sizes, transformer types, and primary voltages, multiple FRPPE tables are required as noted in followingthetables.Distribution PPE TablesPrimary / Secondary Lateral FeedsARC-FLASH EXPOSURE in cal/cm2120/240 Volt Single-Phase Over-Head Transformer ngle-Phase(Open Air)Three-Phase /7.213.2Y/7.67.2Δ, 12.0Δ12.5Δ7.2Y/4.28.3Y/4.84.2Δ, 4.3Δ,4.8Δ,ARCPRO ʹ Open/Open Air, 15", 5-ƐĞĐ͕ 2.47Y/7.213.2Y/7.67.2Δ, 12.0Δ12.5Δ7.2Y/4.28.3Y/4.84.2Δ, 4.3Δ,4.8ΔϭɌRating(KVA)4.2Y/2.42.4ΔARCPRO- Enc. Switchgear, 18", 2-ƐĞĐ͕ ϭ͘Ϯϱ͟ ŐĂƉ (1.5x)No FaceProtectionRequiredMinimum Head & Face ProtectionArc-Rated FaceArc-Rated FaceShield withShieldBalaclava 9 cal/cm29 to 12 cal/cm213 to 20 cal/cm221 to 40 cal/cm2 5 cal/cm25 to 8 cal/cm29 to 20 cal/cm221 to 40 cal/cm216Arc-Rated Hood

FR Clothing & Protective Equipment ʹContractor Guideline03-31-2016Version 5Distribution PPE TablesPrimary / Secondary Lateral Feeds (Continued)ARC-FLASH EXPOSURE in cal/cm2120 / 208Y & 240 Volt Over-Head Transformer 213.2Y/7.67.2Δ2, 12.0Δ12.5Δ, 13.2Δ17.2Y/4.28.3Y/4.84.2Δ, 4.3Δ, 4.8Δ,7.2Δ1, 7.6Δ1IEEE ʹ Open/Open Air, 15", 5-ƐĞĐ͕ Ϯ͟ .5507510016725033350012.47Y/7.213.2Y/7.67.2Δ2, 12.0Δ12.5Δ, 13.2Δ13ΦRating(KVA)7.2Y/4.28.3Y/4.84.2Δ, 4.3Δ, 4.8Δ,7.2Δ1, 7.6Δ11ΦRating(KVA)4.2Y/2.42.4ΔIEEE - Enclosed Switchgear, 18", 2-ƐĞĐ͕ ϭ͘Ϯϱ͟ ŐĂƉ(1) Indicates Three-Phase Delta Primaryvoltage only;(2) IndicatesSingle-Phase (Two-conductor) Delta Primary / Single & Three Phase Grounded Wye (kV)only.ExposureThree-Phase orEnclosedNo FaceProtectionRequired 5 cal/cm2Minimum Head & Face ProtectionArc-Rated FaceArc-Rated FaceShield withShieldBalaclava5 to 8 cal/cm2179 to 20 cal/cm2Arc-Rated Hood21 to 40 cal/cm2

FR Clothing & Protective Equipment ʹContractor Guideline03-31-2016Version 5Distribution PPE TablesPrimary / Secondary Lateral Feeds (Continued)ARC-FLASH EXPOSURE in cal/cm2277/480Y & 480 Volt Over-Head Transformer 8*22.9Y/13.213.2Δ212.47Y/7.213.2Y/7.67.2Δ2, 12.0Δ12.5Δ, 13.2Δ17.2Y/4.28.3Y/4.84.2Δ, 4.3Δ, 4.8Δ,7.2Δ1, 7.6Δ1IEEE ʹ Open/Open Air, 15", 5-ƐĞĐ͕ Ϯ͟ .5507510016725033350012.47Y/7.213.2Y/7.67.2Δ2, 12.0Δ12.5Δ, 13.2Δ13ΦRating(KVA)7.2Y/4.28.3Y/4.84.2Δ, 4.3Δ, 4.8Δ,7.2Δ1, 7.6Δ11ΦRating(KVA)4.2Y/2.42.4ΔIEEE - Enclosed Switchgear, 18", 2-ƐĞĐ͕ ϭ͘Ϯϱ͟ ŐĂƉ202040402020204040404020204040*Meter Service work requires a minimum of 20 cal/cm2 fornon-CTall -metered equipment;(1) Indicates Three-Phase Delta Primary voltage only;(2) Indicates Single-Phase (Two-conductor) Delta Primary / Single & Three Phase Grounded Wye (kV)only.ExposureThree-Phase orEnclosedNo FaceProtectionRequired 5 cal/cm2Minimum Head & Face ProtectionArc-Rated FaceArc-Rated FaceShield withShieldBalaclava5 to 8 cal/cm2189 to 20 cal/cm2Arc-Rated Hood21 to 40 cal/cm2

FR Clothing & Protective Equipment ʹContractor Guideline03-31-2016Version 5Distribution PPE TablesPrimary / Secondary Lateral Feeds (Continued)ARC-FLASH EXPOSURE in cal/cm21-Φ PAD-MOUNTED TRANSFORMERSARCPRO – 120/240 Volt, Enclosed, 18”, 2-second, 1.25”gap (1.5x)KVA4.2Y/2.4kV8.3Y/4.8kV7.2Y/4.2kV4.3 75100167ExposureThree-Phase orEnclosedNo FaceProtectionRequired 5 cal/cm222.9Y/13.2kV24.9Y/14.4kV12.0 kVΔ34.5Y/19.9kV88Minimum Head & Face ProtectionArc-Rated FaceArc-Rated FaceShield withShieldBalaclava5 to 8 cal/cm2199 to 20 cal/cm2Arc-Rated Hood21 to 40 cal/cm2

FR Clothing & Protective Equipment ʹContractor Guideline03-31-2016Version 5Distribution PPE TablesPrimary / Secondary Lateral Feeds (Continued)ARC-FLASH EXPOSURE in cal/cm23Φ PAD-MOUNTED TRANSFORMERSIEEE Method ʹ 120/208Y & ϮϰϬѐ sŽůƚ͕ ŶĐůŽƐĞĚ͕ ϭϴ͕͟ Ϯ-SecondKVA4.2Y/2.4kV8.3Y/4.8kV7.2Y/4.2kV4.3 502253005007501000150020002500ExposureThree-Phase orEnclosedNo FaceProtectionRequired 5 cal/cm222.9Y/13.2kV24.9Y/14.4kV12.0 kVΔ34.5Y/19.9kV8820Minimum Head & Face ProtectionArc-Rated FaceArc-Rated FaceShield withShieldBalaclava5 to 8 cal/cm2209 to 20 cal/cm2Arc-Rated Hood21 to 40 cal/cm2

FR Clothing & Protective Equipment ʹContractor Guideline03-31-2016Version 5Distribution PPE TablesPrimary / Secondary Lateral Feeds (Continued)ARC-FLASH EXPOSURE in cal/cm23Φ PAD-MOUNTED TRANSFORMERSIEEE Method ʹ 277/480Y & 48Ϭѐ sŽůƚ͕ ŶĐůŽƐĞĚ͕ ϭϴ͕͟ 004.2Y/2.4kV8*8*8.3Y/4.8kV7.2Y/4.2kV4.3 13.2kV24.9Y/14.4kV12.0 eter Service work requires a minimum of 20 cal/cm2 for all -CTnon-metered equipmentExposureThree-Phase orEnclosedNo FaceProtectionRequired 5 cal/cm2Minimum Head & Face ProtectionArc-Rated FaceArc-Rated FaceShield withShieldBalaclava5 to 8 cal/cm2219 to 20 cal/cm2Arc-Rated Hood21 to 40 cal/cm2

FR Clothing & Protective Equipment ʹContractor Guideline03-31-2016Version 5Secondary Distribution NetworkLocationNetwork Protectors216Y /125 (120 /208) Volts20 cal/cm2480Y / 277Volts40 cal/cm2DiscussionEnhanced PPE is required until the network protector fuse andtransformer link are removed, using long insulated tools. Oncethe links are removed and energized surfaces guarded workersmay reduce FR PPE to their base layers.To mitigate risk, the network protector shall be opened prior toremoving or installing network protector fuses and links.Secondary NetworkCables8 cal/cm28 cal/cm28 cal/cm28 cal/cm2Cover-up, care, and worker procedures shall limit the possibilityof a fault. Extreme care shall be used while connecting cables inparallel to avoid cross-phasing.Cable LimitersCover-up, care, and worker procedures shall limit the possibilityof a fault. The cause of a failed cable limiter shall be adequatelyinvestigated to avoid re-energizing failed cables.Secondary ServiceCablesCover-up, care, and worker procedures shall limit the possibilityof a fault. Extreme care shall be used while connecting servicecables in parallel to avoid cross-phasing. If work is associatedwith a customer outage, work should be coordinated in a mannerthat allows as much of our work as possible to be performed deenergized.8 cal/cm28 cal/cm2Secondary serviceswitches andMetering CTCabinets20 cal/cm2100 cal/cm2Secondary NetworkFed Meters–SelfContained20 cal/cm2100 cal/cm2Secondary NetworkFed Meters–CTMetered28 cal/cm28 cal/cmArc-flash exposure values are still being assessed, and these recommendations may change as additional industry testing is completed and documented.Arc-flash exposure values are still being assessed, and these recommendations may change as additional industry testing is completed and documented.See secondary network fed meters – self-contained above for theFR PPE requirements when working with the CT portions of themetering installation.NOTES: All recommendations are based on the facilities being worked as the only on arc-flash hazard in the vicinityof the work being performed. If there are other electrical facilities in the vicinity the worker, that also posean arc-flash hazard, the worker may have to increase FR PPE levels to account for that hazard. For detail discussion on Network Secondary Systems, see the “Arc Flash Hazard Assessment: UndergroundSecondary Network Systems ( 600 V)” located within the FEU Safety Share Point Site.22

FR Clothing & Protective Equipment ʹContractor Guideline03-31-2016Version 5Engineering AssumptionsFirstEnergy Utilities (Company)made broad-brush arc-flash assessments of thearc-flash energiesthat could result on the Company’sry, and secondarytransmission,systems.In2general, this assessment identified an-flasharc exposure of 8 cal/cmor less for the bulk of thesystem, with some exceptions.To performthis broad-brush assessment many individual cases were2not evaluated where a new Company standard of 8 cal/cmPPE would suffice, for example: 2If a certain size -linkT fuse was found to limit the arc-flash exposure to less than 8 cal/cm,smaller fuse sizes were not evaluated.N-link and K-link fuses operate quicker than similarly sized-linkT fuses, so these fuse typeswere not evaluated.Single, slow-trips (D curves) of 280 ampere hydraulic reclosers, at 15 kV were found to limit2the arc-flash exposureot less than 2 cal/cm, so quicker (lower rated) settings were notevaluated.Key assumptions for primary line and secondary-flasharc assessments were as follows or as detailedin each chart: IEEE 1584 and ARCPRO were used for analysis;Insulated cover-up is sufficient to limit the arc-flash exposure to a single-phase exposureSingle fault/arc flash event (i.e.herew devices could reclose, only the first operation wasconsidered)System nominal voltageThe worker distance to the arcMaximum time of workerexposureOpen or Enclosed exposuresFor secondary exposures, the kVA of the source transformersKey assumptions for transmission and substation-flasharc assessments were as follows: ARCPRO was used for analysisPhase-to-phase distances are sufficiento limittthe arc-flash exposure to a single-phaseexposureSingle fault/ arc flash event (i.e.uto-reclosingais disabled)System nominal voltageThe Minimum Approach Distance for the system voltageMaximum time of worker exposure (2 seconds for workground,on5 seconds for work aloft)Open or Enclosed exposuresKey assumptions for secondary network-flasharc assessments are as detailed in the chart.From the arc-flash hazard perspective, disabling auto reclose avoids the double-exposure of aworker to an arc hazard; and this is important when the worker is at those close working distances23

FR Clothing & Protective Equipment ʹContractor Guideline03-31-2016Version 5associated with gloving(please refer to the Appendix section for more information regarding -autoreclose settings). Note: FR clothing is only rated, and tested,r thepe ASTM Standards for onemomentary exposure and the FR fabric can be damaged, in providing-flasharcprotection, and stillpass per the Standard. The longer worker-to-arc distances that may occur when using -linelive tools(hot-sticking) provide additional worker arc-flash protection. Based on these facts, if rubber coverup is being.24

FR Clothing & Protective Equipment ʹContractor Guideline03-31-2016Version 5DisclaimerIn accordance with OSHA standards (29 CFR Parts 1910 and–Electric1926 Power Generation,Transmission, and Distribution; Electrical Protective Equipment –Final Rule), FirstEnergy Utilities(“FEU”) has performed an assessment to estimatemay be potentially exposedfrom electric arc hazards.The estimates and other information(including but not limited toOSHA guidance) have been used to establish the FEU Fire RetardantProtective Clothing and Equipment Requirements.(The Clothing and Equipment Requirements were prepared solely and exclusively for the use andsafety of FEU employees.The Clothing and Equipment Requirements are made available to contractor employers and othersfor information and illustrative purposes only and are subject to change at any time without .noticeThey do not supersede any generalduties or OSHA regulatory requirements for contractoremployers and others to perform their own assessments, including the appropriate FR protectiveclothing and equipment to be worn by their employees to protect against potential or actualhazards.TheClothing and Equipment Requirements are based on broad estimates, assumptions, and OSHAguidance, and are not specific to individual tasks being performed, or to every exposure scenariothat contractor employees and others may be exposed to.FEU’s g Clothinand Equipment Requirements are not intended to supplant or serve in lieu of thecontractor employer’s own responsibilitiesrequirements. Contractor employers and others shall consult the applicable OSHAdardsstanfor thespecific requirements applicable when developing their own company-specific FR clothing andprotective equipment policies and programs.Contractor employers who wish to use the Clothingand Equipment Requirements as a model for their own loyeesemp must ensure that they areapplicable for the tasks or risks their employees are to perform or be exposed.to25to cr

FR Clothing & Protective Equipment ʹContractor Guideline03-31-2016Version 5Appendix: Auto-Reclosing for Distribution PrimaryAs a result of our continued efforts to assess and evaluate the FR Programchanges, the FR team hasrevised the requirement of when auto reclosing must be disabled. These revisions maintaincompliance with OSHA regulations and our current PPE requirements. The clarifications for thischange are: When working downstream of a elinfuse, the incident energy to which the employee is exposedis at or below our Base 8 PPE requirementeven when considering a second operation of arecloser. When performing tasks on conductors and supports that are in good physical condition whichlimit the worker interaction withsecured energized conductors andthe worker’s abilitcontrol the conductor, the risk of a fault is mitigated.When Auto Reclosing Must Be Disabled:1. Installing and removing conductors over or near energized conductorsgreater( than 600volts), regardless of location of work being performed.2. When working between a substation or a line recloserand a line fuse, whereenergizedconductors or conductor supports are being moved or changed. Examples include:ooooReplacing cross arms, brackets, and pinsChanging insulators and tying in energized conductorsWorking on structures where there are obvious structural deficiencies in the energizedconductor supports, including cross arms, brackets, insulators, and polesCutting energized conductors to install insulators, switches, and-outscutWhen Auto Reclosing Does Not Need To Be Disabled*:1. Performing live-line tool applications2. When working downstream of any fuse, except when installing and removing conductorsover or nearenergized conductors.3. When the conductors and supports are in good physical condition, and energizedconductors are secured and not being moved or changed. Examples include:oooInstalling rubbercover-up materialsInstalling stirrups and connectingdisconnecting/equipmentrisers to stirrupsInstalling and removing transformers, capacitors, andURDrisers* NOTE: Auto reclosingmay be disabled if deemed necessary to mitigate other hazardsof the job.The FR Program Teamwill continue toresearch this practice to determine if there areadditionalopportunities torefine these requirements.26

cessary to mitigate other hazardsof the job.The FR Program Team will continue to research this practice to determine if there are additionalopportunities to refine these requirements.26

Company Substation Circuit Voltage PPE Required Comments Met-Ed Birdsboro 758 13.2 10 Met-Ed Carsonia 766 13.2 9 Met-Ed Grantley 404 4.8 11 Met-Ed Lincoln Park 750, 751 13.2 10 Met-Ed Mt. Rose 660 13.2 15 Met-Ed Mt. R