CSE Pure Power - Summer 2008 - (Page 32)

❯❯ 32 codes story There’s never been a more important reason to go back to college… Arc ﬂash is a dangerous condition that can have devastating effects on your plant and especially on your people. That’s why Plant Engineering is partnering with GE and Hawk I.R. to open Arc Flash University. An eight-month series of 30-minute Webcasts will examine all aspects of this important issue. Arc Flash University registrants who attend six of the eight Webcasts will receive CEU credit, and can qualify to receive Arc Flash University merchandise. Class is now in session Register now at www.PlantEngineering.com PL ANT ENGINEERING ARC FL ASH UNIVERSIT Y PARTNERS: or near,” which has always been problematic, the limits of approach will be used. The following three examples illustrate: “…working on or near within the Limited Approach Boundary…” “…working on or near within the Flash Protection Boundary…” “110.8(A) General - Safetyrelated work practices shall be used to safeguard employees from injury while they are working on or near exposed to electrical hazards from electrical conductors or circuit parts that…” The new In a 480-V, three-phase system, arc fault will be 40% to 60% of recommended the total bolted fault current. wording is much clearer, leaving little switchgear means that if properly or no doubt about secured, ﬁre-resistant clothing or the intent. Identifying the speciﬁc equipment are not needed to operate, hazard of concern or, as in the third install, or remove rack breakers. example, indicating all hazards, If the door is open, it would have resolves the ambiguity issues and the same level of risk as traditional conveys a clear intent to the worker. switchgear. To a majority of electrical workers, In addition, infrared tables are an area of high interest, thermography became a task but remain difﬁcult to use. By reading to some types of equipment. the notes in the tables, many of the A reduced level of personal problems people have with the tables protective equipment (PPE) is can be solved. In many cases, the allowable, if the thermographer workers fail to enhance their safety does not remove panel covers and actually put themselves into a and does not break the plane more dangerous situation. The Tables of the equipment. A new Task Group worked to make the tables equipment category was added for clearer by using the same terminology “utilization equipment fed by a found in the rest of the 70E: no use of branch circuit of the panelboard “live,” “working on or near,” or other or switchgear,” which applies to vague or misleading language. equipment such as receptacles, In Table 130.7(C)(9), the addition motors, and other small devices. of new tasks involving arc-resistant www.purepowermagazine.com http://www.PlantEngineering.com http://www.PlantEngineering.com http://www.purepowermagazine.com

Table of Contents Feed for the Digital Edition of CSE Pure Power - Summer 2008

CSE Pure Power - Summer 2008 Contents In the News Industry Roundup Risk Assessments for COPS Grounding Requires More Power Systems to Protect Healthcare Important Changes Coming in NFPA 70E A Look at Arc-Resistant Switchgear Agencies and Associations New Products Ad Index

CSE Pure Power - Summer 2008

For optimal viewing of this digital publication, please enable JavaScript and then refresh the page. If you would like to try to load the digital publication without using Flash Player detection, please click here.