Now more than ever, we appreciate our friends. The people out there doing their
jobs and serving the community. To our factory workers and store associates joining the fight, and
everyone on the frontlines working to keep the rest of us healthy and safe, thank you for continuing to
inspire us with all you do.
Now more than ever, we appreciate our friends. The people out there doing their jobs and
serving the community. To our factory workers and store associates joining the fight, and everyone on the
frontlines working to keep the rest of us healthy and safe, thank you for continuing to inspire us with all
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Note: table above adopted from 2015 edition - nfpa 70e
Look for these Carhartt PPE category color codes when shopping on Carhartt.com
NFPA 70E, the standard for electrical safety in the workplace, is published by the National Fire Protection Association (NFPA).
The NFPA has served as an authority in the U.S. on fire, electricity and building safety since 1896. The purpose
of the standard is to provide a "practical safeguarding of employees during activities such as the installation,
operation, maintenance, and demolition of electric conductors, electric equipment, signaling and communications
conductors." NFPA 70E is a voluntary consensus standard, not a law. However, the U.S. Occupational Safety and
Health Administration (OSHA) recognizes NFPA 70E as a generally accepted industry practice and has referenced
it in citations.
Who NFPA 70E covers
NFPA 70E was developed to protect electrical workers in all industries who work on or near energized parts or equipment that
are capable of generating an arc flash. Such equipment would include high-voltage switching and grounding gear,
panel boards, switchboards, motor control centers, motor starters, metal clad switchgear, transformers, and meters.
Common occupations covered under NFPA 70E include electrical maintenance workers, industrial electricians, and
What NFPA 70E requires
Flame resistant clothing is addressed in Chapter 1 of the standard, Safety-Related Work Practices. NFPA 70E requires employers
to conduct an arc flash hazard analysis to identify a worker's potential exposure to arc-flash energy. The results
of the analysis are then used to determining safe work practices, arc flash protection boundaries, and the appropriate
level of personal protective equipment. The standard states that all equipment must be de-energized before being
worked on unless the employer can demonstrate that de-energizing introduces additional or increased hazards or
is infeasible due to equipment design or operational limitations. If de-energizing the equipment is not feasible,
the employer must establish a "flash protection boundary" which is the minimum distance from an arc source where
a person could receive a second-degree burn if an arc flash occurred. When it is determined that an employee
must perform electrical work within the flash protection boundary, he or she shall wear protective clothing and
all parts of the body within the arc flash protection boundary must be protected. NFPA 70E requires the use of
one of two methods for determining the appropriate level of flame-resistant clothing: 1. Incident Energy Analysis
- The employer must determine the potential incident energy exposure of the worker in cal/cm ². Based on this
analysis, the worker must wear arc-rated flame-resistant clothing with an Arc Thermal Performance Value (ATPV
- measured in cal/cm ²), or EBT greater than the potential exposure level. 2. Personal Protective Equipment (PPE)
Categories (CAT) - To simplify the process, NFPA 70E has developed a table of common electrical job tasks and
determined a PPE category for each task. The table above, adapted from NFPA 70E-2015 (Table 130.7(C)(16)), lists
the four PPE categories, corresponding required minimum arc rating of flame-resistant clothing and the Carhartt
PPE category color codes.
Look for Carhartt PPE category color codes when viewing our online products. An ATPV/EBT is a rating assigned to
flame-resistant clothing indicating the level of protection provided. Higher-weight (e.g., thicker, denser) fabrics
typically have higher Arc Flash Rating and provide increased protection (as does the layering of FR clothing).
All Carhartt flame-resistant clothing has the ATPV/EBT marked on the inside label for easy reference. The ATPV
is expressed in calories per cm2 (CAL/CM²) and represents the thermal exposure from an electric arc that at 50%
probability will create a second-degree burn in human tissue. If the ATPV cannot be calculated because the fabric
breaks open, the energy causing the fabric to break open is expressed as the Energy of Breakopen Threshold (EBT).
The higher the value the greater the protection.
For general industry, NFPA 70E:
Mandates that employers conduct a risk assessment to determine the potential arc exposure for employees who
work on or near energized parts or equipment. The level of arc exposure is referred to as the ATPV/EBT
and is measured in calories/cm² (often called a cal rating).
Requires employees to wear flame-resistant clothing with a PPE category rating, equal to or greater than
the determined arc hazard.
Simplifies the risk assessment and compliance process by creating PPE categories for common tasks an electrical
worker would perform. Therefore, an FR clothing item's PPE (CAT) rating determines if that item provides
sufficient protection for a particular job. As a result, Carhartt FR clothing carries PPE CAT tags. And,
unlike some others, Carhartt PPE CAT tags are externally visible, allowing supervisors and safety officers
to easily confirm workers are in compliance with NFPA 70E regulation.
For more information or to purchase a copy of the NFPA 70E standard visit the
NFPA web site.
NFPA 2112, the standard for flame-resistant garments for protection of industrial personnel against flash fire, is published
by the National Fire Protection Association (NFPA). The National Fire Protection Association has served as an
authority in the U.S. on fire, electricity and building safety since 1896. The purpose of the standard is to
"provide minimum requirements for the design, construction, evaluation, and certification of flame-resistant
garments for use by industrial personnel, with the intent of providing a degree of protection to the wearer and
reducing the severity of burn injuries resulting from accidental exposure to hydrocarbon flash fires" NFPA 2112
is a voluntary consensus standard, not a law. However, OSHA recognizes NFPA 2112 as a generally accepted industry
Who NFPA 2112 covers
NFPA 2112 was developed to protect industrial workers and primarily those in the oil and petrochemical industries
against flash fires. A flash fire is defined as "a fire that spreads rapidly through a diffuse fuel,
such as dust, gas, or the vapors of an ignitable liquid, without the production of damaging pressure".
Flash fires are unplanned exposures that typically last three seconds or less. NFPA 2112 does not apply
to protective clothing for electrical flashes, wildland fire fighting, technical rescue, structural fire
fighting, proximity fire fighting, or any fire fighting operations or hazardous materials emergencies.
What NFPA 2112 requires
Organizations must conduct a hazard assessment of the work environment to determine if flammable chemicals
are present in quantities necessary to generate a flash fire. If a flash-fire hazard does exist, the
requirements for wearing flame-resistant clothing shall be based on the potential hazards that workers
are exposed to as part of their work duties. Factors in determining if flame-resistant clothing is required
shall include, but not be limited to, the following:
The potential for the task being performed to increase the possibility of a flammable release; this could
result from a mechanical failure such as a line breaking.
The presence of engineering controls designed to reduce exposure to flammable materials present during
Operating conditions of the process - that is, potential for flammable fumes or vapors, and so forth.
The presence of engineering controls designed to reduce exposure to flammable materials present during
Accident history. If it is determined that flame-resistant clothing is required, the garments shall comply
with the requirements of NFPA 2112 and be labeled accordingly.
In order for garments to be meet NFPA 2112 standards all components of the garment must be tested and certified
by a 3rd party. The most common certification is completed by UL. A garment will include a label showing
that it is UL Classified. Customers can also check garment certification on the UL website.
For the oil and petrochemical industries, NFPA 2112:
Mandates that employers conduct a flash-fire hazard assessment to determine the risk of a flash fire.
Requires employees to wear flame-resistant clothing if the potential for a flash fire exists.
The U.S. Occupational Safety and Health Administration's (OSHA) 29 CFR 1910.269 covers the operation and maintenance
of electric power generation, control, transformation, transmission and distribution lines and equipment.
Part (l) (6) (iii) states: "The employer shall ensure that each employee who is exposed to the hazards of
flames or electric arc does not wear clothing that, when exposed to flames or electric arcs, could increase
the extent of the injury that would be sustained by the employee". This is the only federal law relating
to FR clothing for electrical purposes. It is currently being rewritten and is expected to closely mirror
the NFPA70E and NESC standards.
Carhartt FR garments that meet NFPA 2112 standards for the oil & gas industry have been classified by Underwriters
Published by the Institute of Electrical and Electronics Engineers (IEEE), the National Electrical Safety Code (NESC) sets
the ground rules for practical safeguarding of persons during the installation, operation, or maintenance of
electric supply and communication lines and associated equipment. The NESC contains the basic provisions that
are considered necessary for the safety of employees and the public under the specified conditions. Although
not a federal law (some states do make the NESC law), NESC is a voluntary consensus standard, and is the standard
OSHA refers to when abating electrical safety in the utility industry. Although the NESC has been in existence
since 1973, the 2007 revision marked the first time that flame-resistant, arc-rated clothing was included as
a safety requirement and the 2012 version expanded arc-rated clothing down to lower voltages with complete tables
specifying apparel requirements from 4 cal/cm ² through 60 cal/cm ².
Who NESC covers
NESC is specific to the electrical utility industry and "covers the electric supply conductors and equipment . .
.(including) electric supply stations, that are accessible only to qualified personnel." NESC basically applies
to all electric utility work performed at investor-owned utilities, electric co-ops and municipalities.
What NESC requires
The NESC Rule 410A3 governing the use of flame-resistant, arc-rated clothing for electrical utilities, requires the
Effective January 1, 2009, the employer shall ensure that an assessment is performed to determine potential
exposure to an electric arc for employees who work on or near energized parts or equipment. The 2012
rule added low voltage equipment to the >1000V equipment requirement in 2007.
If the assessment determines a potential employee exposure greater than 2 cal/cm² exists, the employer shall
require the employee to wear clothing or a clothing system that has an effective arc rating at least
equal to the anticipated level of arc energy.
When exposed to an electric arc or flame, clothing made from the following materials shall not be worn: Acetate,
nylon, polyester, or polypropylene unless arc rated in a blend.
The effective arc rating of clothing or a clothing system to be worn shall be determined using Tables 410-1,
410-2, and 410-3 or performing an arc hazard analysis.
When an arc hazard analysis is performed, it shall include a calculation of the estimated arc energy based
on the available fault current, the duration of the arc (cycles), and the worker distance from the potential
EXCEPTION : If the clothing required by this rule has the potential to create additional and greater hazards than the possible
exposure to the heat energy of the electric arc, then clothing with an arc rating or ATPV less than that
required by the rule can be worn. This is normally allowed for uncommon work methods such as helicopter work
on live power lines.
For electric utilities, NESC:
Specifies that employers conduct a hazard risk assessment to determine the potential arc exposure for employees
who work on or near energized parts or equipment.
Requires employees to wear flame-resistant clothing with an ATPV, or cal rating, equal to or greater than
the determined arc hazard.