Arc-rated protective clothing does not have one fixed expiration date.

Some garments may remain suitable for years, while others may need to be retired much sooner because of frequent wear, improper laundering, contamination, physical damage or exposure to an arc-flash incident.

The better question is not simply, “How old is this garment?” It is:

Is the garment still clean, intact, properly labelled and capable of providing the level of protection for which it was selected?

The useful life of arc-rated clothing should be determined through regular inspection, manufacturer instructions, care history and the employer’s electrical safety programme. Garments that are damaged, contaminated or altered in a way that could impair protection must not remain in service.

For Canadian electrical workers and employers, PPE selection should form part of the electrical risk assessment and workplace electrical safety programme. CSA Z462:24 is the current active Canadian workplace electrical safety standard and addresses electrical safety systems, safe work procedures and the selection of protective equipment for workers exposed to electrical hazards.

Quick Answer

There is no universal number of years or washes after which every arc-rated garment must be replaced.

Arc-rated clothing can remain in service while:

• Its arc-rating label remains identifiable
• The fabric is not excessively worn or thin
• Seams and closures remain intact
• There are no unrepaired holes, tears or frayed areas
• It has not been contaminated with flammable substances that cannot be removed
• It has been cleaned according to the manufacturer’s instructions
• It still fits properly and provides the required body coverage
• The manufacturer or employer has not specified an earlier retirement point

A garment should be removed from service when its protective performance may have been impaired, even if it has not reached a particular age or number of wash cycles. Manufacturer guidance similarly treats useful life as dependent on the work environment, frequency of use, cleaning and physical condition rather than one universal retirement date.

Arc-Rated vs Flame-Resistant Clothing

The terms arc-rated and flame-resistant are related, but they do not mean exactly the same thing.

Arc-rated clothing is flame-resistant clothing that has also been evaluated for exposure to the thermal energy produced by an electric arc. Its arc rating is expressed in calories per square centimetre, written as cal/cm².

All arc-rated clothing is flame resistant, but not every flame-resistant garment has an arc rating suitable for electrical arc-flash protection. The original JM Test article makes this distinction and warns against treating the terms as interchangeable.

ASTM F1506 establishes minimum requirements covering arc rating, flame resistance, mechanical durability, garment construction and labelling for protective clothing worn by workers exposed to flames and electric arcs. The current edition listed by ASTM is F1506-25.

Therefore, when selecting clothing for an identified arc-flash hazard, confirm that the garment:

• Is specifically arc rated
• Has a visible arc rating in cal/cm²
• Meets the applicable garment standard
• Provides an arc rating appropriate for the assessed exposure
• Is being worn as part of the complete required PPE system

A garment marked only as flame resistant should not automatically be assumed to provide suitable arc-flash protection.

Why Arc-Rated Clothing Condition Matters

Arc-rated clothing is intended to reduce the severity of thermal injury during a short-duration electric-arc exposure.

Its performance can be affected when the garment becomes physically degraded or contaminated. A garment that once met its labelled rating may no longer provide dependable coverage if it has large tears, open seams, worn areas, missing fasteners or flammable contamination.

The original JM Test article identifies threadbare fabric, frayed edges, torn seams, damaged collars and cuffs, bleach exposure and stains from flammable substances that cannot be removed as reasons for concern or garment retirement.

Damage matters for more than one reason:

• A hole can expose non-arc-rated clothing or skin beneath it.
• A failed closure can allow the garment to open during an incident.
• Thin or worn fabric may offer less dependable thermal protection.
• Oil, grease or another combustible contaminant can act as fuel.
• An improper repair can introduce non-arc-rated fabric, thread or hardware.
• An illegible label can prevent workers from confirming the garment’s protection level.

ASTM F1506 requires garment labelling that gives users enough information to select clothing with an appropriate arc rating.

What Determines the Life Expectancy of Arc-Rated Clothing?

1. Frequency of Use

A garment worn during every shift will normally experience more abrasion, laundering and mechanical wear than a suit used only for occasional energized work.

Daily-wear shirts, trousers and coveralls may be exposed regularly to:

• Repeated bending and stretching
• Contact with tools and equipment
• Abrasion at cuffs, elbows and knees
• Sweat and body oils
• Industrial contamination
• Frequent washing and drying

An arc-flash suit reserved for occasional tasks may receive less routine wear, but it can still deteriorate through poor storage, moisture, contamination, damaged closures or improper handling.

Age alone is therefore not a reliable comparison between a frequently worn garment and an occasionally used suit.

2. Fabric and Garment Construction

Different arc-rated fabrics and garment systems can wear differently.

The useful life can be influenced by:

• Fibre and fabric type
• Fabric weight
• Inherent or treated flame-resistant properties
• Seam construction
• Closures and fasteners
• Reflective or visibility components
• Reinforced wear areas
• Exposure to abrasion or chemicals

ASTM F1506 evaluates not only arc and flame performance but also fabric and garment characteristics such as mechanical durability, tear resistance, bursting strength, seam performance and construction.

The older lifespan estimates in the original article—such as assigning specific numbers of months or years to cotton, cotton/nylon or Nomex blends—should not be presented as guaranteed replacement intervals. Actual service life varies too widely by garment, fabric technology, workload and care history.

Use the garment manufacturer’s current instructions rather than a generic fabric-age table.

3. Laundering Method

Improper laundering can reduce garment life, leave combustible residue or damage fabric and garment components.

ASTM maintains separate guidance for the industrial and home laundering of flame-resistant and arc-rated clothing:

• ASTM F1449 for industrial laundering
• ASTM F2757 for home laundering

Both guides are currently listed by ASTM as active care and maintenance references.

The correct wash instructions vary by garment, but common requirements may include:

• Following the temperature shown on the care label
• Using the recommended detergent
• Washing heavily contaminated PPE separately
• Rinsing thoroughly
• Avoiding products prohibited by the manufacturer
• Drying at the specified temperature
• Avoiding excessive heat
• Inspecting the garment after cleaning

Do not assume one laundering method is appropriate for every arc-rated garment. Follow the garment label and manufacturer instructions.

4. Bleach, Fabric Softener and Laundry Additives

Chlorine bleach can damage or compromise some flame-resistant fabrics and is prohibited by many garment manufacturers.

Fabric softeners, starches and detergents containing certain additives may also leave residues or affect protective performance, depending on the garment system. For example, Bulwark instructs users of its protective garments not to use bleach, starch, fabric softener or detergents containing hydrogen peroxide on specified FR garments.

The safest rule is:

Do not add bleach, softener, starch, peroxide products or other treatments unless the garment manufacturer specifically permits them.

If a garment has accidentally been washed with a prohibited chemical, remove it from service and contact the manufacturer or qualified PPE provider before using it again.

5. Contamination

Contamination can shorten garment life even when the fabric is not visibly torn.

Potentially problematic contaminants include:

• Oil
• Grease
• Fuel
• Solvents
• Paint
• Adhesives
• Flammable chemicals
• Combustible dust
• Conductive material
• Unknown industrial substances

Arc-rated fabric may resist ignition or self-extinguish, but combustible contamination on the garment can ignite and continue burning.

The original JM Test article specifically recommends retiring clothing stained with a flammable substance that cannot be removed through laundering. Manufacturer guidance similarly states that petroleum-based soils can mask flame-resistant performance and act as fuel; garments that cannot be adequately cleaned should be removed from service.

A garment with an unknown chemical exposure should be isolated until the contaminant and appropriate decontamination method are identified.

6. Physical Damage

Physical wear is one of the clearest indicators that a garment requires repair or retirement.

Inspect for:

• Holes
• Tears
• Rips
• Thin or transparent areas
• Frayed cuffs and collars
• Open seams
• Broken stitching
• Missing buttons or snaps
• Damaged zippers
• Failed hook-and-loop closures
• Damaged hoods or face-opening interfaces
• Burn marks
• Charred areas
• Melted components
• Damaged reflective trim
• Unreadable labels

Garment manufacturers commonly recommend inspection before each wearing and removal from service where damage is too extensive to be repaired correctly.

A small problem should not be ignored merely because the rest of the garment appears new.

7. Storage Conditions

Arc-rated clothing should be stored in a clean, dry location where it is protected from:

• Moisture
• Direct sunlight
• Industrial dust
• Chemicals
• Oil and grease
• Sharp tools
• Compression that damages face shields or hoods
• Excessive heat
• Rodents or insects

Manufacturer guidance recommends clean, dry storage away from direct light and from conditions that may physically damage or contaminate the garment.

Arc-flash suits should not be thrown loose into service vehicles, stored beside oily tools or left where face shields can be scratched or distorted.

8. Exposure to an Arc Flash, Flame or Extreme Heat

Any garment exposed to an actual arc-flash event, flame impingement or severe heat should be removed from service immediately.

Even when damage is not obvious, the incident may have affected:

• Fabric strength
• Closures
• Seams
• Face shields
• Hoods
• Elastic components
• Reflective trim
• Internal layers
• Garment interfaces

The complete PPE system should be evaluated by the manufacturer or a qualified inspection and repair provider before any component is returned to service.

Manufacturer guidance also recommends removing protective clothing from service following significant flame or heat exposure.

How Often Should Arc-Rated Clothing Be Inspected?

Arc-rated clothing should be inspected before each use.

The wearer should look for visible damage, contamination, missing components and anything that could interfere with correct fit or body coverage. Manufacturer guidance specifically places responsibility on the wearer to check for rips, holes, thin spots, damaged closures and heavy soiling before wearing the garment.

Employers should also establish a formal periodic inspection process for shared arc-flash suits and other less frequently used PPE.

A practical programme can include:

Before Each Use

The worker checks the garment’s condition, label, fit, closures and cleanliness.

After Laundering

The garment is checked for shrinkage, damage, residual stains, closure problems and unreadable markings.

At Scheduled Intervals

The employer or PPE coordinator performs and documents a more detailed inspection.

After an Incident or Unusual Exposure

The garment is immediately removed from service and evaluated before reuse.

The original JM Test article also recommends inspecting arc-rated clothing before use in the same way workers inspect other electrical PPE.

Arc-Rated Clothing Inspection Checklist

Before wearing arc-rated clothing, check the following.

Label and Rating

Confirm that:

• The garment is identified as arc rated
• Its arc rating remains legible
• The rating meets the task requirement
• The garment can be matched to its manufacturer and model
• Required care information remains available

Fabric

Look for:

• Tears or holes
• Threadbare fabric
• Excessive thinning
• Burn marks
• Charred areas
• Chemical damage
• Permanent staining
• Unusual stiffness or brittleness

Seams

Check for:

• Open seams
• Broken thread
• Fraying
• Separation at stress points
• Failed reinforcement patches

Closures

Test:

• Buttons
• Snaps
• Zippers
• Hook-and-loop closures
• Cuff closures
• Hood closures
• Bib and suspender hardware

Cleanliness

Look and smell for:

• Oil
• Grease
• Fuel
• Solvent
• Chemical contamination
• Combustible dust
• Unknown residue
• Petroleum odour

Fit and Coverage

Confirm that:

• Sleeves remain long enough
• The garment closes fully
• Trousers provide appropriate coverage
• The garment is not excessively tight
• Normal movement does not expose skin or non-rated layers
• Hoods, gloves and garments interface correctly

When Should Arc-Rated Clothing Be Retired?

Remove arc-rated clothing from service when:

• It is damaged beyond an approved repair
• It has holes, tears or severely worn areas
• Seams or closures can no longer provide proper coverage
• Flammable contamination cannot be completely removed
• It has been washed with a prohibited chemical and cannot be cleared by the manufacturer
• The arc-rating label is missing or no longer readable
• It has experienced significant arc, flame or heat exposure
• It has been altered with non-compliant materials
• It no longer fits properly
• The manufacturer has established a retirement limit
• Its condition creates reasonable doubt about its protection

Do not keep questionable PPE in circulation while deciding what to do. Mark it as out of service and store it separately from approved garments.

Can Damaged Arc-Rated Clothing Be Repaired?

Some damage can be repaired, but only when the repair preserves the garment’s protective properties.

Repairs should use:

• Compatible arc-rated fabric
• Appropriate flame-resistant thread
• Suitable closures and findings
• A repair method approved by the manufacturer
• A qualified repair provider where required

Manufacturer guidance recommends that repairs be completed by an experienced service provider using materials comparable to those used in the garment’s original construction. Significant alterations can reduce protective performance and should not be made casually.

Do not repair arc-rated clothing with:

• Ordinary fabric patches
• Standard polyester thread
• Unapproved adhesive
• Non-rated reflective tape
• Generic zippers or closures
• Household iron-on patches

When repair suitability is uncertain, retire the garment or send it to a qualified inspection and repair provider.

Daily-Wear Clothing vs Arc-Flash Suits

Daily-wear arc-rated clothing and arc-flash suits require the same basic principles of inspection and care, but their service conditions differ.

Daily-Wear Garments

These include:

• Shirts
• Trousers
• Coveralls
• Jackets
• Base layers
• Balaclavas

They may experience frequent laundering, abrasion and contamination. Wear commonly appears first at cuffs, collars, elbows, knees, pockets and seams.

Arc-Flash Suits

These can include:

• Arc-rated coat and bib-overall systems
• Hoods
• Face shields
• Hard-hat assemblies
• Gloves and accessories
• Storage bags

They may be worn less frequently, but multiple workers may use the same suit. Shared equipment therefore needs:

• Cleaning between users where appropriate
• Documented inspection
• Hygienic maintenance
• Correct storage
• Tracking of missing parts
• Face-shield inspection
• Verification that the complete kit remains together

The garment fabric is not the only component with a service-life concern. Hoods, face shields, hard hats, ventilation systems, gloves and closures must also be inspected and maintained according to their individual manufacturer instructions.

Building an Arc-Rated Clothing Management Programme

For Canadian employers, arc-rated clothing should be managed as part of the workplace electrical safety programme rather than left entirely to individual judgement.

CSA Z462:24 is the current active Canadian workplace electrical safety standard. It provides a framework for electrical safety programmes, safe work practices and PPE selection for electrical hazards.

A practical clothing management process should include:

1. Hazard assessment and selection
   Select clothing with an arc rating appropriate for the identified exposure.
2. Garment identification
   Record manufacturer, model, arc rating, issue date and assigned worker or kit.
3. Training
   Teach workers how to inspect, wear, close, clean and store the clothing.
4. Pre-use inspection
   Require inspection before every use.
5. Cleaning instructions
   Provide access to garment-specific laundering information.
6. Periodic formal inspection
   Document more detailed inspections for shared suits and critical PPE.
7. Repair control
   Prevent unauthorized repairs or alterations.
8. Out-of-service process
   Clearly identify and segregate damaged or questionable PPE.
9. Incident review
   Remove and evaluate all PPE involved in an electrical incident.
10. Record retention
    Keep inspection, cleaning, repair and retirement records where required by company policy.

CSA Z462 does not replace provincial, territorial or federal workplace requirements. The employer should also review the applicable occupational health and safety rules and authority requirements for the work location.

Does Arc-Rated Clothing Expire After a Certain Number of Washes?

Not necessarily.

The number of wash cycles can be relevant for some materials or manufacturer qualifications, but it is not a reliable universal replacement rule.

ASTM F1506 includes fabric performance requirements following specified laundering or dry-cleaning cycles, but it places ongoing care and maintenance outside its scope and directs users to ASTM F1449 or F2757 for industrial or home laundering guidance.

In real use, two garments washed the same number of times may have very different conditions because of:

• Different soil levels
• Different wash chemistry
• Different drying temperatures
• Different work environments
• Different amounts of abrasion
• Different contamination histories
• Different repair histories

Tracking wash counts can support a clothing programme, but it should not replace physical inspection and manufacturer guidance.

Practical Takeaway

Arc-rated clothing does not come with one standard life expectancy.

Its usable life depends on the garment, material, work environment, frequency of wear, cleaning practices, contamination history, storage conditions and physical state.

The most important rules are:

• Inspect arc-rated clothing before every use.
• Follow the garment manufacturer’s care instructions.
• Never assume that all flame-resistant clothing is arc rated.
• Do not use clothing with unremovable flammable contamination.
• Do not make repairs with ordinary fabric or thread.
• Remove damaged or questionable clothing from service.
• Evaluate PPE after any arc-flash or significant heat exposure.
• Manage clothing through the employer’s electrical safety programme.

The oldest garment is not automatically the least safe, and the newest garment is not automatically suitable. Condition, rating, care and correct use are what determine whether it belongs in service.

JM Test Systems Canada can support electrical safety programmes with arc-flash suits, arc-rated PPE, suit cleaning and inspection support, electrical safety equipment rentals and related services.