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Western Safety Products, Inc. 505 South Lander St., Seattle, WA 98134
Toll Free: (888) 823-0808 Phone: (206) 264-0808 Fax: (206) 264-4921
Website: http://www.westernsafety.com sales@westernsafety.com

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Oberon Arc Protection Products - 2007 - Index

ELECTRIC-ARC FLASH Protection Guidelines
If the label does not say it, do not use it!!!
F1506 details the specifications of a textile to be used by an electrical worker as a means of electrical protection. A garment must include a label, which states ALL six of these items to qualify as an ARC protective garment:
  1. Tracking Identification Code
  2. Meets F1506
  3. Manufacturer's Name
  4. Care Instructions & Fiber Content
  5. Size and other associated standard labeling
  6. "Arc Rating" - ATPV or EBT

"When garments are made with a different number of fabric layers in different areas of the garment, the arc rating for each area shall be designated. Pockets, trim, closures, seams, labels and heraldry shall not be considered as extra layers"

All Arc Flash garments are not created equal!!!
F1959 details the standardized test method, which must be employed to determine the thermal protective value of a textile material in an Electrical Arc application.

  • Stoll Curve - curve used to predict the onset of a second degree burn
  • Requires a minimum of 20 test data points
  • Arc Rating:
    • ATPV: defined as the minimum incident thermal energy that causes the onset of a second degree burn when Stoll is reached without breakopen occuring
    • EBT: defined as the average of five or more highest incident exposure energy values (without breakopen) below Stoll when breakopen occurs before reaching Stoll
    • We DO NOT recommend using EBTAS because you will not be in compliance with F-1506 nor NFPA 70E and a second or third degree burn could result using this value. EBTAS by definition is a rating above Stoll (occurence of second degree burn). EBTAS is used primarily in the Rainwear standard (ASTM F1891).

Flame retardant clothing is a requirement!!!
"The employer shall ensure that each employee who is exposed to the hazards of flames or electric arcs does not wear clothing that, when exposed to flames or electric arcs, could increase the extent of injury that would be sustained by the employee." Not: Employee shall not wear clothing made from the following types of fabrics, either alone or in blends: acetate, nylon, polyester, rayon.
Clarifications - June 1994 - Employers must make a determination of whether or not 100% cotton or wool clothing worn by a worker is acceptable under the conditions to which the worker could be exposed. Clothing made from flame retardant or flame resistant materials, in accordance with ASTM F1506, is acceptable under the rule.

Clothing used must prevent second degree burn!!!
The protective clothing selected for a particular application shall have an arc protective rating (EBT or ATPV) higher than the hazard to prevent the onset of a second degree burn

  • Flash hazard analysis shall be done before a person approaches a hazard
  • Employees working in areas where there is an electrical hazard shall be provided with, and shall use, appropriate protective equipment
  • The entire flash suit, including the window, shall have energy absorbing characteristics that are suitable for the arc-flash exposure.
Voltage does not determine Hazard Category levels. Knowing the voltage is only one piece for determining the Arc Flash protective clothing. The available fault current, the clearing time, the working distance and the type of equipment are also needed to determine the potential Arc Flash exposure level and the required PPE.
Before you can assess the arc flash protection needed for a task, you must first determine the potential arc flash exposure level by conducting a hazard analysis. It is the arc flash exposure level that will dictate the arc flash protection needed.
Resources for conducting hazard analysis:
Electrical Engineering Studies
IEEE P1584 Standard
Software Programs
NFPA 70E Annex D
NFPA 70E Table 130.7(C)(9)(a)
Oberon's STEP 1-2-3 Program

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