Below is an example arc flash tag with typically included information with indicators to detail what each piece of information is.
A
B
F
C
G
D
E
H
I
Information descriptions below are done such that the typical name on the tag is shown, followed by the table header on the following pages in parenthesis and a brief description of what the information means. A. Flash Hazard at 18 Inches (Incident Energy): the calculated incident energy. This defines how large the arc flash will be. B. PPE Description: Abbreviated description of the required PPE to access the equipment. See appendix A for further details. C. Glove Class: Rating of insulated glove required based on the voltage of the equipment. D. Short Circuit (Bus Bolted Fault): Maximum amount of current possible to pass through the equipment in a 3 phase to ground fault. Used to determine if the equipment has a proper short circuit rating. E. Shock Hazard (Bus kV): Maximum voltage located within the equipment which defines approach boundaries and glove class. F. Flash Hazard Boundary (Arc Flash Boundary): How far a person needs to be away from open equipment to be safe from permanent harm in the event of an arc flash. G. Limited Approach Boundary: Distance an unqualified and unaccompanied person must be away from the shock hazard (voltage). H. Restricted Approach: Distance that may not be passed without a qualified person, proper PPE, and proper procedure for live work. Dictated by shock hazard (voltage). I. Equipment Name (Bus Name): Name of the equipment as the facility has it named. J. Arc Flash PPE Level: Site definition of what PPE is required to be worn to access the equipment live. May or may not be used depending on the electrical safety program on site. This arc flash tag is a typical tag matching NFPA 70E-2021 and does not show the PPE level. The site specific tag will include this information.
SITE NAME ARC FLASH STUDY
Page 10 of 77
INTERSTATES DATE
Powered by FlippingBook