DOW RESTRICTED - For internal use only EWP-21 w/Freeport Additions Personal Protective Equipment for Electrical Arc Flash Hazards

DOW RESTRICTED - For internal use onlyDOW RESTRICTED - For internal use only

EWP-21 w/Freeport EWP-21 w/Freeport AdditionsAdditions

Personal Protective Personal Protective Equipment for Electrical Equipment for Electrical

Arc Flash HazardsArc Flash Hazards


Learning ObjectivesLearning Objectives

Understand the hazards presented by an Understand the hazards presented by an electrical arc flash;electrical arc flash;

Know when arc flash PPE is required;Know when arc flash PPE is required;

Know what arc flash PPE to wear;Know what arc flash PPE to wear;

Know how to properly wear and use arc Know how to properly wear and use arc flash PPE; and flash PPE; and

Know how to properly maintain arc flash Know how to properly maintain arc flash PPE.PPE.

At the end of this training the student will:At the end of this training the student will:


What exactly is an arc flash?What exactly is an arc flash? An arc flash is a short circuit through the An arc flash is a short circuit through the

air between two conductors.air between two conductors.

During an arc flash, ionized air is the During an arc flash, ionized air is the conductor.conductor.

The plasma will conduct as much energy The plasma will conduct as much energy as is available from the source, and is only as is available from the source, and is only limited by the impedance of the arc.limited by the impedance of the arc.

Electric welding is a controlled arc flash.Electric welding is a controlled arc flash.

Lightning is an uncontrolled arc flash.Lightning is an uncontrolled arc flash.


How Is An Arc Flash Created?How Is An Arc Flash Created?

An arcing flash is created when an unintentional An arcing flash is created when an unintentional current path is established due to insulation current path is established due to insulation breakdown, equipment failure, faulty breakdown, equipment failure, faulty maintenance, or incorrect switch gear operation.maintenance, or incorrect switch gear operation.

The fault could be between phases, between a The fault could be between phases, between a phase & neutral or between a phase and ground.phase & neutral or between a phase and ground.

The initial cause of the arc fault normally burns The initial cause of the arc fault normally burns away rapidly and the arc fault is then sustained away rapidly and the arc fault is then sustained by the establishment of a highly-conductive by the establishment of a highly-conductive plasma until circuit protective devices operate.plasma until circuit protective devices operate.


What does What does it look like?it look like?

Arc Flash!Arc Flash!


What Are The Results Of An Arc What Are The Results Of An Arc Flash?Flash?

Massive release of radiant energy.Massive release of radiant energy.

Very loud noise.Very loud noise.

Rapid expansion of vaporized copper and other Rapid expansion of vaporized copper and other materials.materials.

Creation of a very fast moving pressure wave.Creation of a very fast moving pressure wave.

Fiery explosion creating deadly shrapnel and Fiery explosion creating deadly shrapnel and molten metal.molten metal.


Results of an Arc FlashResults of an Arc Flash


What are the effects on you?What are the effects on you?


Can ignite and/or Can ignite and/or melt conventional melt conventional work clothing work clothing causing 3causing 3rdrd degree degree burns on much of burns on much of the clothed areas the clothed areas of the bodyof the body

What are the effects on you?What are the effects on you?

DOW RESTRICTED - For internal use onlyDOW RESTRICTED - For internal use onlyEST4-17

Electrical Hazards - Arc FlashElectrical Hazards - Arc Flash

TEMPERATURE DATATEMPERATURE DATA Degrees Degrees FF

Curable Burn (1/10 Sec.)Curable Burn (1/10 Sec.) 145145

Cell Death (1/10 Sec.)Cell Death (1/10 Sec.) 205205

Clothing IgnitionClothing Ignition 700-1400700-1400

Burning ClothingBurning Clothing 14001400

Metal DropletsMetal Droplets 18001800

Surface of the SunSurface of the Sun 9,0009,000

ARC TerminalsARC Terminals 35,00035,000

DOW RESTRICTED - For internal use onlyDOW RESTRICTED - For internal use onlyEST4-17

Age Range, Years

20-29 30-39 40-49 50-59

C

han

ceof

Su

rviv

al, %

0

20

40

60

100

80

25% Body Burn

50% Body Burn

75% Body Burn

Source: American Burn Association (1991-1993 Study)

CHANCE OF SURVIVAL FROM BURN CHANCE OF SURVIVAL FROM BURN INJURYINJURY


BEFOREAFTER

What are the effects?What are the effects?


How Do We Protect Ourselves?How Do We Protect Ourselves?

Arc Flash PPE is designed to protect you Arc Flash PPE is designed to protect you from the radiant and thermal effects of an from the radiant and thermal effects of an arc fault.arc fault.

To be properly protected, you must know:To be properly protected, you must know:

– When arc flash PPE is required.When arc flash PPE is required.

– What arc flash PPE to wear.What arc flash PPE to wear.

– How to properly wear & use arc flash PPE.How to properly wear & use arc flash PPE.

– How to properly maintain arc flash PPE.How to properly maintain arc flash PPE.


1)1) Selection of PPE based on Incident energy Selection of PPE based on Incident energy calculations. EMETL G7Z-1210-series are based on calculations. EMETL G7Z-1210-series are based on IEEE 1584 standard and the preferred way to perform IEEE 1584 standard and the preferred way to perform these calculations. these calculations.

The Arc Thermal Protection Value (ATPV) of PPE selected The Arc Thermal Protection Value (ATPV) of PPE selected must exceed the calculated incident energy. must exceed the calculated incident energy.

PPE selection is based on the calculated heat energy PPE selection is based on the calculated heat energy released if an electrical arc, short circuit or fault were to released if an electrical arc, short circuit or fault were to occur. occur.

Factors that influence the calculation of energy released Factors that influence the calculation of energy released from an arc are the voltage level, the arcing current, from an arc are the voltage level, the arcing current, distance from the arc, duration of arc and equipment distance from the arc, duration of arc and equipment configuration. configuration.

Incident energy (calories/cm²) is the term used to describe Incident energy (calories/cm²) is the term used to describe the calculated heat energy at a standard working distance the calculated heat energy at a standard working distance from the arc.from the arc.

Determination of the Arc Flash PPE Determination of the Arc Flash PPE Required:Required:



Preferred Method – Incident Energy Calculation Method

Incident Energy (calories/cm²) PPE Clothing

<1.2 cal/cm² Flame-Resistant Clothing/Garments not required

1.2 cal/cm² to 8.0 cal/cm² - HRC 1+2 Flame-Resistant Clothing/Garments

>8.0 cal/cm² to 25 cal/cm² - HRC 3 Flash Suit rated at or above 25 cal/cm²

>25 cal/cm² to 50 cal/ cm² - HRC 4 Flash Suit rated at or above 50 cal/cm²

> 50 cal/cm² Contact your Electrical Discipline Activity Specialist



2) The second method for selecting arc flash PPE 2) The second method for selecting arc flash PPE is called the Simplified Method. This method is called the Simplified Method. This method requires arc flash incident energy calculation to requires arc flash incident energy calculation to determine the highest incident energy that is determine the highest incident energy that is available at the site. All electrical tasks that are available at the site. All electrical tasks that are not documented to have potential exposures not documented to have potential exposures below 1.2 cal/cm² will then require PPE suitable below 1.2 cal/cm² will then require PPE suitable for the highest incident energy level for that site.for the highest incident energy level for that site.



3) The third method for selecting arc flash PPE is 3) The third method for selecting arc flash PPE is to refer to published tables that list required to refer to published tables that list required PPE for typical electrical tasks. This method is PPE for typical electrical tasks. This method is acceptable, but less preferred than methods 1 acceptable, but less preferred than methods 1 or 2. See EWP-21, Attachment 1.or 2. See EWP-21, Attachment 1.


Determination of the Arc Flash PPE Determination of the Arc Flash PPE Required, Freeport Requirements:Required, Freeport Requirements:

Freeport has completed an arc flash hazard study.

1. Operating all 480 volts ac and 250 volts dc and above electrical switching equipment within the arc flash hazard distance requires the use of a flash suit with the following exceptions:

a. equipment protected by an RK-1 or RK-5 fuse of 400 amps or less or

b. switchgear that is rated by the manufacturer to be “Arc Resistant” or Arc Proof” gear or

c. where determined by an engineering study that no arc flash hazard exists or

d. Any 250 volt D.C. circuit protected by a 75 amp, or below, circuit breaker or fuse.

2. Where arc flash protection is required, an approved 50 cal/cm2 flash suit as defined by this standard shall be worn.

3. Where an arc flash hazard exists, minimum arc flash hazard distance is 10 feet. All unprotected personnel must be at least 10 feet from switching devices while they are being operated..


(Freeport Addition) All nominally voltage (Freeport Addition) All nominally voltage rated 480 volt ac and 250 volt dc and rated 480 volt ac and 250 volt dc and above electrical switching equipment shall above electrical switching equipment shall be labeled “Flash Suit Required” or “Flash be labeled “Flash Suit Required” or “Flash Suit Not Required”Suit Not Required”

Communication of when Arc Flash Communication of when Arc Flash PPE Required:PPE Required:


2) PPE to be used shall be listed on the Safe Work 2) PPE to be used shall be listed on the Safe Work Permit if a SWP is needed.Permit if a SWP is needed.

3) Your switching, operating, maintenance or other 3) Your switching, operating, maintenance or other procedures used shall list the required PPE.procedures used shall list the required PPE.

4) You may also post in electrical equipment rooms 4) You may also post in electrical equipment rooms and use and use EWP-21 Attachment 1 Selection of PPE EWP-21 Attachment 1 Selection of PPE vs. taskvs. task (Freeport Addition) All nominally (Freeport Addition) All nominally voltage rated 480 volt ac and 250 volt dc voltage rated 480 volt ac and 250 volt dc and above electrical switching equipment and above electrical switching equipment shall be labeled “Flash Suit Required” or shall be labeled “Flash Suit Required” or “Flash Suit Not Required”“Flash Suit Not Required”

Communication of when Arc Flash Communication of when Arc Flash PPE Required:PPE Required:


When Is Arc Flash PPE Required:When Is Arc Flash PPE Required:

Whenever arc flash PPE is required, a complete Whenever arc flash PPE is required, a complete arc flash suit must be worn consisting of hood, arc flash suit must be worn consisting of hood, coat, leggings and gloves.coat, leggings and gloves.


Flame Resistant Clothing/Garments (FRC) consists of:Flame Resistant Clothing/Garments (FRC) consists of:

High cuff leather gauntlet gloves made from leather weighing High cuff leather gauntlet gloves made from leather weighing more than 12 oz./yard² (0.42 kg per square meter).more than 12 oz./yard² (0.42 kg per square meter).

Safety glasses/gogglesSafety glasses/goggles A face shield having a minimum ATPV rating of 8 cal/cm².A face shield having a minimum ATPV rating of 8 cal/cm². Long sleeve coveralls or combination long sleeved shirt and Long sleeve coveralls or combination long sleeved shirt and

pants rated at ATPV of 8 cal/cm² or above.pants rated at ATPV of 8 cal/cm² or above.– Electrical Skilled or Instructed Persons that routinely works Electrical Skilled or Instructed Persons that routinely works

with electrical equipment which poses an Arc Flash Incident with electrical equipment which poses an Arc Flash Incident Energy greater than1.2 cal/cm² shall wear this PPE as daily Energy greater than1.2 cal/cm² shall wear this PPE as daily wear.wear.

Note: This will typically apply to electricians, Heating, Note: This will typically apply to electricians, Heating, ventilation, Air Conditioning (HVAC) technicians, linemen, ventilation, Air Conditioning (HVAC) technicians, linemen, and others that are Electrical Skilled or Instructed and others that are Electrical Skilled or Instructed Persons.Persons.

What To Wear - What To Wear - for arc flash incident for arc flash incident energy of 1.2 to 8.0 cal/cm2:energy of 1.2 to 8.0 cal/cm2:



Freeport Additions:Instrument, Electrical, Analyzer, Refrigeration and Heat

Tracing technicians who interface daily with electrical equipment will require the use of 8 cal/cm2 fire retardant clothing as daily wear.

Instrument and Electrical Engineers and I/E/A/R/HT Technologists must have available 8 cal/cm2 fire retardant clothing in the form of coveralls to wear any time they are going into the field to do work.



Typical Flame Resistant Garment/ Clothing (FRC)Typical Flame Resistant Garment/ Clothing (FRC)

Safety Glasses

Class 0 1000Vinsulated gloveswith leather protectors

ATPV rating of 8 cal/cm²

High cuff leather gauntlet gloves for non-contact of electrical conductor activities.

A face shield having a minimum ATPV rating of 8 cal/cm^2.


A complete Arc Flash Suit consists of:A complete Arc Flash Suit consists of:Head protectionHead protection::

50 cal/cm2 rated Hood w/ Face Shield. Safety glasses must 50 cal/cm2 rated Hood w/ Face Shield. Safety glasses must also be worn.also be worn.

Body protection:Body protection:50 cal/cm2 rated calf length coat50 cal/cm2 rated calf length coat

Hand protection:Hand protection:100 cal/cm2 rated Kevlar switching gloves 100 cal/cm2 rated Kevlar switching gloves

- or -- or -20kV Electrical Rubber Gloves w/leather protectors20kV Electrical Rubber Gloves w/leather protectors

Leg and feet protection:Leg and feet protection: 50 cal/cm2 rated leggings with leather safety shoes50 cal/cm2 rated leggings with leather safety shoes

Hearing protection:Hearing protection:Ear plugsEar plugs

What To Wear - What To Wear - for arc flash incident for arc flash incident energy up to 50 cal/cm2:energy up to 50 cal/cm2:


Head ProtectionHead ProtectionIncluding safety glasses and Including safety glasses and

hearing protectionhearing protection

Body ProtectionBody Protection

Hand ProtectionHand Protection

Leg & Foot ProtectionLeg & Foot ProtectionIncluding leggings and leather Including leggings and leather

safety shoessafety shoes

What To Wear - What To Wear - for arc flash incident for arc flash incident

energy up to 50 cal/cm2:energy up to 50 cal/cm2:


The Arc Rating & The Arc Rating & Ventilation labels will be Ventilation labels will be

attached as shownattached as shown

50 cal/cm2 rated Hood w/ 50 cal/cm2 rated Hood w/ Face ShieldFace Shield

What To Wear - Head Protection:What To Wear - Head Protection:


50 cal/cm50 cal/cm2 rated Coatrated Coat

The Arc Rating label The Arc Rating label will be attached as will be attached as

shownshown

What To Wear - Body Protection:What To Wear - Body Protection:


Gloves rated at Gloves rated at least 50 cal/cm2 least 50 cal/cm2 Kevlar switching Kevlar switching

gloves.gloves.

The Arc Rating label will The Arc Rating label will be attached as shownbe attached as shown

What To Wear - Hand Protection:What To Wear - Hand Protection:

Kevlar Gloves are NOT Kevlar Gloves are NOT voltage ratedvoltage rated


20kV Electrical 20kV Electrical Rubber gloves Rubber gloves

w/Leather w/Leather ProtectorsProtectors

What To Wear - Hand Protection:What To Wear - Hand Protection:


50 cal/cm2 50 cal/cm2 rated Leggingsrated Leggings

What To Wear – Leg and Foot What To Wear – Leg and Foot Protection:Protection:

The Arc Rating label The Arc Rating label will be attached as will be attached as

shownshown


The coat is putThe coat is put on first.on first.

A properly fitting coat:A properly fitting coat:• Has the Velcro seal mated over Has the Velcro seal mated over

its entire length.its entire length.• Extends several inches below Extends several inches below

the knees.the knees.• Allows for unrestricted range of Allows for unrestricted range of

motion.motion.

How To Wear It:How To Wear It:


All coats have double wide Velcro for quicker All coats have double wide Velcro for quicker mating and easier use by several body sizes.mating and easier use by several body sizes.



How To Wear It:How To Wear It:Use the right size coat! Wearing a coat backwards leaves Use the right size coat! Wearing a coat backwards leaves

an unprotected area in the back that an unprotected area in the back that willwill get burned. get burned.


FlashFlash Hood Use: Hood Use: Prior to use, adjust the hard hat head band Prior to use, adjust the hard hat head band

for a comfortable fit and to minimize for a comfortable fit and to minimize inadvertent hood movement.inadvertent hood movement.

Orient the hood to maximize your field of Orient the hood to maximize your field of vision.vision.

Be sure the neck drapes extend fully over Be sure the neck drapes extend fully over the coat, front and back.the coat, front and back.



The hood is put on second. Arc-flash hoods come in The hood is put on second. Arc-flash hoods come in only one size. Each hood comes with a replaceable only one size. Each hood comes with a replaceable hard hat having an adjustable head band.hard hat having an adjustable head band.



Hoods should be put on just prior to performing Hoods should be put on just prior to performing the switching operation and removed as soon as the switching operation and removed as soon as possible after switching is completed.possible after switching is completed.

DO NOT WEAR HOOD FOR LONGER THAN DO NOT WEAR HOOD FOR LONGER THAN 5 MINUTES AT A TIME5 MINUTES AT A TIME

For extended work periods, remove the hood or For extended work periods, remove the hood or lift up the front drape periodically to allow fresh lift up the front drape periodically to allow fresh air to enter the hood.air to enter the hood.

Consult with your Industrial Hygiene Rep for Consult with your Industrial Hygiene Rep for extended wear time options.extended wear time options.



A 5-Finger Glove and 1-Finger Mitt style are A 5-Finger Glove and 1-Finger Mitt style are available.available.

Either style can be used for switching Either style can be used for switching operations.operations.

Be sure the coat sleeves are tucked into the Be sure the coat sleeves are tucked into the glove gauntlets.glove gauntlets.

(This also applies when wearing electrical (This also applies when wearing electrical rubber gloves as well.)rubber gloves as well.)


Flash Gloves:Flash Gloves:


How To Wear It:How To Wear It:The gloves are put on last. Be sure that the coat The gloves are put on last. Be sure that the coat sleeves are worn inside the glove gauntlets as shown.sleeves are worn inside the glove gauntlets as shown.


Prohibited clothingProhibited clothing

1.1. The wearing of exposed clothing The wearing of exposed clothing that could increase the extent of a that could increase the extent of a burn injury shall not be worn. burn injury shall not be worn.

2.2. Exposed clothing made from Exposed clothing made from synthetic materials such as acetate, synthetic materials such as acetate, nylon, rayon, polyester, nylon, rayon, polyester, polypropylene and spandex, either polypropylene and spandex, either alone or in blends that may melt alone or in blends that may melt shall not be used.shall not be used.


How To Use It: How To Use It: Avoid standing directly in Avoid standing directly in front of equipment being switched unless it is front of equipment being switched unless it is the only feasible position.the only feasible position.

Equipment Equipment Being switchedBeing switched


How To Use It:How To Use It:


How To Use It:How To Use It:


General Care:General Care:– Flammable contaminants will reduce the thermal Flammable contaminants will reduce the thermal

performance of any flame resistant garment.performance of any flame resistant garment.

– Ensure that no greases, oily soils or other flammable Ensure that no greases, oily soils or other flammable contaminants (such as DEET insect repellant) are present contaminants (such as DEET insect repellant) are present when the garment is worn.when the garment is worn.

– Flash suits or fire retardant clothing contaminated with Flash suits or fire retardant clothing contaminated with hydrocarbons or other flammable substances must be hydrocarbons or other flammable substances must be washed before use. washed before use.

– Repairs to the garment must be made by qualified tailors Repairs to the garment must be made by qualified tailors using correctly rated flame resistant components.using correctly rated flame resistant components.

How To Maintain It:How To Maintain It:


Cleaning:Cleaning:

Follow the Follow the cleaning cleaning instructions as instructions as found on the found on the garment label.garment label.



Cleaning (General Instructions for Nomex PPE only):Cleaning (General Instructions for Nomex PPE only):

1.1. Wash Nomex garments alone or only with Wash Nomex garments alone or only with other Nomex garments.other Nomex garments.

2.2. Machine wash in Hot Water (140Machine wash in Hot Water (14000F/60F/6000C)C)

3.3. Use Heavy Duty detergent.Use Heavy Duty detergent.

4.4. Do Not use chlorine bleach or detergents Do Not use chlorine bleach or detergents containing chlorine bleach.containing chlorine bleach.

5.5. Do Not use fabric softeners.Do Not use fabric softeners.

6.6. Tumble Dry Low (160Tumble Dry Low (16000F/71F/7100C)C)

7.7. Do Not line dry in sunlight.Do Not line dry in sunlight.



Cleaning (cont’d):Cleaning (cont’d):

8.8. Remove face shield, hard hat and frame from the Remove face shield, hard hat and frame from the hood before laundering.hood before laundering.

9.9. Face shields should be cleaned using a soft cloth Face shields should be cleaned using a soft cloth and water only.and water only.

10.10. Use of detergents or harsh cleaning agents will Use of detergents or harsh cleaning agents will degrade the arc-flash rating of the shield.degrade the arc-flash rating of the shield.

11.11. Use of anti-fog coatings and scratch removing Use of anti-fog coatings and scratch removing compounds will likewise degrade the arc-flash compounds will likewise degrade the arc-flash rating of the shield.rating of the shield.



Storage:Storage:

1.1. Arc-Flash PPE should be stored in an enclosure that Arc-Flash PPE should be stored in an enclosure that provides protection from contaminants and sunlight.provides protection from contaminants and sunlight.

a.a. Use a designated cabinet or locker for indoor storage.Use a designated cabinet or locker for indoor storage.b.b. Use a flash suit bag to store gear for mobile Use a flash suit bag to store gear for mobile

applications.applications.

2.2. Spare shields should be stored in a protective pouch.Spare shields should be stored in a protective pouch.a.a. Face shields with cracks, deep gouges or excessive Face shields with cracks, deep gouges or excessive

scratches must be replaced.scratches must be replaced.b.b. Only the face shield listed in the Site PPE Matrix as Only the face shield listed in the Site PPE Matrix as

approved for Arc-Flash Protection shall be used to approved for Arc-Flash Protection shall be used to replace a damaged shield.replace a damaged shield.



Replaceable Arc Flash Hood PartsReplaceable Arc Flash Hood Parts




Use only approved replacement face shields.Use only approved replacement face shields.


Flash Hood Assembly – Attaching Face Flash Hood Assembly – Attaching Face Shield to Head GearShield to Head Gear

1. Orient the tabs to 1. Orient the tabs to mount the face shield.mount the face shield.

2. Rotate the tabs to lock the 2. Rotate the tabs to lock the face shield in place.face shield in place.

There are five face shield locking There are five face shield locking tabs on the Head Gear.tabs on the Head Gear.



1. Turn the Shell inside-out. 1. Turn the Shell inside-out.

2. Start by aligning the Face 2. Start by aligning the Face Shield’s bottom edge to the Shell. Shield’s bottom edge to the Shell.

3. Pull the Shell over the Head Gear 3. Pull the Shell over the Head Gear before attaching final corner of Velcro.before attaching final corner of Velcro.

Flash Hood Assembly – Mounting the Shell on Flash Hood Assembly – Mounting the Shell on the Face Shieldthe Face Shield



1. Orient the Head Gear locking fingers 1. Orient the Head Gear locking fingers towards the Hard Hat.towards the Hard Hat.

2. Snap in the Hard 2. Snap in the Hard Hat. Hat.

Flash Hood Assembly – Installing the Hard Flash Hood Assembly – Installing the Hard HatHat


3. Check for a complete Velcro seal 3. Check for a complete Velcro seal around the Face Shield before use. around the Face Shield before use.


For additional information contact any member of For additional information contact any member of

the Global Electrical Safety and Maintenance the Global Electrical Safety and Maintenance Technology Resource Network (GESM TRN).Technology Resource Network (GESM TRN).

EWP-21 w/Freeport AdditionsEWP-21 w/Freeport AdditionsPersonal Protective Equipment for Electrical Personal Protective Equipment for Electrical Arc Flash Hazards – User TrainingArc Flash Hazards – User Training

The The EndEnd

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DOW RESTRICTED - For internal use only EWP-21 w/Freeport Additions Personal Protective Equipment for Electrical Arc Flash Hazards