In the blink of an eye. An arc flash incident can occur just that fast. Statistics tell us that in the United States 10 employees are injured daily due to an arc flash. We do not want to hear this has happened to anyone, as it did to one of own (prior to joining of firm) and is why we are passionate about electrical safety. This is how JDRM can help. Download the JDRM Engineering Electrical Safety Brochure.
Short Circuit Study is the first critical step in determining an electrical distribution system’s available fault currents. Per the National Electrical Code, properly rated equipment (new and/or replaced) should be specified to withstand a fault. JDRM has streamlined this process and extensive documentation through years of experience.
A Coordination Study’s goal is to prevent unnecessary loss of power due to a fault in a single piece of equipment. Proper sizes and settings of protective devices (circuit breakers, relays, and fuses) are determined in conjunction with the Short Circuit Study results. Protective device sizes and/or settings are configured to isolate faults and avoid device tripping due to transform inrush or motor start-ups.
The objective of an Arc Flash Hazard Analysis is to protect people while performing their jobs by providing proper arc flash hazard labeling. [OSHA CFR 1910 . 335 and 2012 NFPA 70E 130 . 5 (c)] One of JDRM Engineering’s primary focuses while performing an Arc Flash Hazard Analysis is to reduce hazard categories that are Category 3 and higher down to Category 2 or lower. Although this cannot always be achieved, simple changes in breaker settings or fuse sizes can reduce hazards at a low cost to the customer.
An Arc Flash incident is an explosive release of energy caused by an electrical arc due to a phase to ground or phase to phase fault. Arc flashes can and do kill at distances up to 10 feet.
Arc Flash Hazard awareness and rising injuries prompted OSHA and the National Fire Protection Association to develop standards and regulations pertaining to Electrical Safety in the Workplace (NFPA-70E). The requirement for an Arc Flash Hazard Analysis assessment has existed since 1996, but was not enforced by OSHA until 2004.
Understanding label information is best accomplished by employee education – (click to Electrical Safe Work Practices for training overview) and completes the circle.
Arc Flash Hazard categories range from “Category 0 (≥ 1.2 cal/cm²) to “Dangerous” (≥ 40 cal/cm²). One of JDRM Engineering’s primary focuses while performing an Arc Flash Hazard Analysis is to reduce hazard categories that are Category 3 and higher down to Category 2 or lower. Although this cannot always be achieved, simple changes in breaker settings or fuse sizes can reduce hazards at a low cost to the customer.
OSHA’s activity in this area is discussed in this article published by BusinessInsurance.com
JDRM Engineering can assist in the maintenance of your Arc Flash Analysis. This maintenance service will fulfill the requirements of NFPA-7-E 130.5 for arc flash hazard analysis updates. Any time equipment is added, modified or removed from your system the SKM one-line should be updated and the analysis rerun. This is easily accomplished through an Arc Flash Audit Maintenance Service Agreement with JDRM Engineering.
With 400+ Arc Flash Studies completed, JDRM Engineering has more than experience. We have thorough knowledge of the details, professionals who ask the right questions and time-honed wisdom to provide outstanding service for your operation.
Call Dave Desjardins, P.E., LEED AP, Matt Steffin, or Bob Nicholson, CESCP for details: 419-824-2400.