Suggestion on How to Use Industry Trainers are

Suggestion on How to Use • Industry Trainers are encouraged to use this material in their sessions • Download the presentation file • Print the Notes pages and read them as you view the presentation in the “Slide Show” view. In this way you see the slides in large format and have animation (when available) © 2015 Eaton. All Rights Reserved. . 1

Key 2014 NEC® Changes Affecting Overcurrent Protection © 2015 Eaton. All Rights Reserved. .

Interconnected Electric Power Production Sources-Article 705 Background Info Example of a photovoltaic power sources in addition to the utility. Other sources might include hydro, wind, PV, fuel cell, and on-site generator © 2015 Eaton. All Rights Reserved. . 3

Alt. Energy Cable Limiters -705. 31 New Requirement Cable limiters or current limiting circuit breakers are required where the alternate power sources are connected on the supply side of the service disconnecting means and the conductors are greater than 10 feet in length, measured from the power production source overcurrent protection. Cable Limiter Cable limiters or current limiting circuit breakers provide short-circuit protection for conductors that are often unprotected. Easy solution where it is difficult to install an overcurrent protective device within 10 feet of service conductors. © 2015 Eaton. All Rights Reserved. . 4

Emergency Systems-Article 700 - Background Info Article 700 Emergency Systems • “The provisions of this article apply to the electrical safety of the installation, operation, and maintenance” • “Essential for safety of human life” • Hotels • Theaters • Stadiums © 2015 Eaton. All Rights Reserved. . 5

Emergency System Panelboard SPDs-700. 8 New Requirement “Surge Protection. A listed SPD shall be installed in or on all emergency systems switchboards and panelboards. ” Provides surge protection for critical, life-safety-related loads © 2015 Eaton. All Rights Reserved. . 6

Definition of Selective Coordination-Article 100 Background Info Without Selective Coordination Loads Unnecessarily Lost With Coordination With. Selective Coordination Overcurrents are isolated by only one No Unnecessary Load Lost Blackouts device. No Unnecessary Loads OPENS Opens Fault NOT AFFECTED Fault Not Affected Unnecessary Power Loss © 2015 Eaton. All Rights Reserved. . 7

Definition of Selective Coordination-Article 100 Modified Definition “Coordination (Selective). Localization of an overcurrent condition to restrict outages to the circuit or equipment affected, accomplished by the choice selection and installation of overcurrent protective devices and their ratings or settings for the full range of available overcurrents, from overload to the maximum available fault current, and for the full range of overcurrent protective device opening times associated with those overcurrents. ” X Selective coordination cannot “stop” at 0. 1 or 0. 01 seconds. The definition of “Selective Coordination” now clearly covers all available overcurrents (overloads and short circuits) and all times associated with those overcurrents. © 2015 Eaton. All Rights Reserved. . 8

Selective Coordination-Enforcement New Requirements “Selective Coordination shall be selected by a licensed professional engineer or other qualified persons engaged primarily in the design, installation, or maintenance of electrical systems. The selection shall be documented and made available to those authorized to design, install, inspect, maintain, and operate the system. ” New for elevators (620. 62), emergency (700. 28), legally required standby (701. 27), and critical operations power systems (708. 54) Requirements added to clarify who can design the selectively coordinated system. The responsible party for the selection is required to provide documentation for the OCPD types, ampere ratings, and settings so the circuits can be inspected, installed, and maintained. This will make it easier for AHJs to enforce selective coordination. © 2015 Eaton. All Rights Reserved. . 9

Critical Operations Data Systems-Article 645 Background Info • Information technology equipment system • Continuous operation required • public safety • emergency management • national security • business continuity © 2015 Eaton. All Rights Reserved. . 10

Critical Operations Data Systems-645. 27 New Requirement “Selective Coordination. Critical Operations Data System(s) overcurrent devices shall be selectively coordinated with all supply side overcurrent protective devices. ” OPENS NOT AFFECTED Fault New requirement will help ensure that unnecessary outages to the entire or large parts of a critical operations data system do not occur for overcurrents in a small portion of the electrical distribution system, such as an individual rack. © 2015 Eaton. All Rights Reserved. . 11

Healthcare Selective Coordination 517. 30(F) Modified Requirement “(F) Selective Coordination. Overcurrent protective devices serving the essential electrical system shall be selectively coordinated for the period of time that a fault’s duration extends beyond 0. 1 second. Informational Note: The terms “Coordination” and “Coordinated” as used in this section do not cover the full range of overcurrent conditions. ” Healthcare inspectors should, at minimum, check to assure “coordination” to 0. 1 seconds for the entire essential electrical system. Many of the circuits found in healthcare’s essential electrical systems must be “selectively coordinated” in commercial/institutional construction for all possible overcurrents and opening times associated with those overcurrents. This change clarifies that the healthcare requirement for coordination at 0. 1 seconds and greater is different than the requirement for selective coordination in Sections 620. 62, 645. 27, 700. 28, 701. 27, and 708. 54. © 2015 Eaton. All Rights Reserved. . 12

Arc-Flash Reduction-240. 87 -Background Info • Arc-Flash mitigation techniques • Necessary because of increased arc-flash incident energy when large CBs are intentionally delayed. • 2011 NEC® was unclear with loopholes that allowed some to avoid compliance 240. 87 of 2011 NEC® was saving lives but needed tighter requirements © 2015 Eaton. All Rights Reserved. . 13 13

Arc-Flash Reduction-240. 87 Modified requirement • Requires all CBs, 1200 amperes and above, to include means to reduce arc-flash incident energy • ZSI, Differential Relaying, ARMS, Active Mitigation, Approved Equivalent Modified requirement closes loopholes, providing safer work environments for workers. It is the biggest single improvement to worker arc-flash safety since the addition of arc-flash requirements in the NEC® and NFPA 70 E. © 2015 Eaton. All Rights Reserved. . 14 14

© 2015 Eaton. All Rights Reserved. . 15