Top Commercial / Residential Electrical Requirements *

Transcription

1 Department of Community Development Building Division 4800 West 92 nd Avenue Westminster, Colorado For Information call (303) Fax (303) Top Commercial / Residential Electrical Requirements * 1000 Volts or Less- Based on the 2014 NEC For all permits issued on/or after July 1, 2014 * Note: This list is an abbreviated version of recent commercial and residential code changes. All electrical installers are encouraged to review the complete 2014 NEC document to obtain an understanding of all code changes that will directly affect any electrical installation. 4 new articles added: 2014 NEC Code-wide Changes 393 Low-Voltage Suspended Ceiling Power Distribution Systems 646 Modular Data Centers 728 Fire Resistive Cable Systems 750 Energy Management Systems Code-wide changes: Requirements for DC systems Changing voltage threshold of 600 volts to 1000 volts More prescriptive requirements for markings 2014 NEC Highlights of Major Changes Chapters Premises Wiring (System) has an Informational Note added to provide examples of power sources 100 Accessible, Readily was revised to prohibit the use of tools when equipment is required to have ready access (B) New subsection requirements for Field Applied Hazard Markings was added for warning labels and similar markings required elsewhere in the NEC ( ANSI Z provides guidelines for font size, words, colors, symbols & location) (A) IN new informational note clarifies that the available fault current markings are for short circuit ratings and equipment rating purposes under the NEC and not for arc flash hazard analysis required in NFPA 70E "Lockable Disconnecting Means" is provided for consistent requirements throughout the NEC Updated 6/9/2014 Page 1 of 5

2 110.26(C)(3) The ampere threshold was lowered from 1200A to 800A where personnel doors and listed panic hardware are required for safe egress (E)(2) (a) & (b) adds new requirement for dedicated equipment space at outdoor installations correlating with existing indoor provisions in (E)(1)(a) (A)(4) Revised to increase elevation of live parts against accidental contact to 8-1/2 ft. for voltages 301 to 600V above the floor or working surface corresponds with the NESC 124A3 & Table (A)(7) GFCI protection is now required for receptacles within 6 of all dwelling unit sinks (including kitchen sinks) 210.8(A)(9) GFCI protection is now required where receptacles are installed within 6 of the outside edge of dwelling unit bathtubs or shower stalls 210.8(A)(10) All dwelling unit laundry areas now require GFCI protection for 125-volt, single-phase, 15 & 20-ampere receptacles, regardless of the presence of a sink 210.8(B)(8) GFCI protection is now required for 125-volt, single-phase, 15 & 20-ampere receptacles, installed in all non-dwelling unit garages, service bays, and similar areas 210.8(D) GFCI protection is now required for all outlets that supply dishwashers installed in dwelling units Requires all AFCI devices mandated by to be installed in a readily accessible location (B) Existing branch circuit conductors can be extended up to 6 without AFCI protection where no additional outlets or devices are installed (See also 406.4(D) on replacements) GFP of equipment is now required for branch circuit disconnects meeting provisions at Outlet(s) installed for the purpose of charging electric vehicles are required to be supplied by a separate branch circuit with no other outlets (E)(1) & (2) The requirements for outdoor receptacles at dwellings have been revised to permit the required receptacle outlets to be readily accessible from grade (G) Receptacle provisions for basements, garages, and accessory buildings were revised into a list format. A branch circuit supplying garage receptacles is to supply only the garage. Receptacles are required for each car space in a garage New provision requires125-volt, single phase15a or 20A receptacles to be installed in electrical service areas within 50 ft. Except for 1 & 2 family dwellings (3) Provisions for a meter disconnect switch were revised by adding a label requirement to indicate (METER DISCONNECT NOT SERVICE EQUIPMENT) (D)(1) Common Grounding Electrode Conductor and Taps was revised to address bus bar specifications and connections &.68 Revised to clarify Sole & Grounding Electrode Connections Table (C) Was added to be used for sizing of grounded conductors, main bonding jumpers, system bonding jumpers, and supply side bonding jumpers, rather than Table Table (B) Wire-type equipment grounding conductors are required to be increased in size when the minimum sized ungrounded conductors are increased in size Page 2 of 5

3 Will now require Grounded Systems over 1kV to have a grounded conductor to be brought to the service. Ungrounded Systems over 1kV will require a supply side bonding jumper brought to the service Interior of raceways installed in wet locations above grade are now considered to be a wet location for installations of over 1kV Has changes to tables in subparts (B)(3)(a) and (B)(3)(c) and removed Table (B)(7) which requires the user to size 100A to 400A service conductors and the main power feeder for dwellings according to a calculation an IN references new Example D7 in Informational Annex D (B) Nonmetallic-sheathed cable interconnectors have been recognized to be used without a box and concealed where used for repair wiring rather than rewiring in existing buildings (B)(1) and (B)(5) requires power distribution blocks be listed for purpose where used on line side of service equipment Listings need to be checked as the devices may be limited to 10kAIC 404.2(C) Requirements exceptions for the grounded conductor at switching locations have been revised into positive text and rearranged into a list format 406.9(B)(1) Extra duty covers are now required for all 15 & 20-ampere, 125 & 250- volt receptacles installed in a wet locations (not just for those supported from grade) Exception for tamper-resistant receptacles at dwelling units has been expanded to guest suites of hotels and motels and to child care facilities 408.4(B) Requires switchgear, switchboards, and panelboards having more than 1 source of power to be marked indicating where all sources originate Adds provisions for minimum required wire bending space for conductors entering the enclosure from the rear similar to that of pull or junction boxes in (A)(2) GFCI protection has expanded to Automotive Vacuum Machines, High Pressure Spray Washers, Vending Machines, and kW or smaller Portable Generators (A) A grounding and bonding terminal bar in transformer enclosures is not permitted to be installed on or over vent screen portion of the enclosure (A) All receptacles or the cover plate supplied from the critical branch are required to have distinctive color or marking so as to be readily identifiable (B), (B), & (C) Revisions to these sections now require more receptacles be installed to supply General Care Patient Bed locations, Critical Care Areas & Operating Rooms The use of, and term, Emergency Systems has been, leaving only the Essential System comprised of 3-branches, Critical, Life safety and Equipment (G) Revised Coordination (Essential Electrical System) for coordination of faults that exceed 0.1 seconds correlates with NFPA (J) Prohibits cable assemblies and flexible cords and cables as branch circuits and feeders from being installed on the floor or ground except extension cords this is an OSHA requirement 600.6(A)(1) Requires disconnect means at the sign s supply wiring point of entry to its enclosure Page 3 of 5

4 680.21(C) All single phase, 120-volt through 240-volt outlets supplying pool pump motors now require GFCI protection (regardless of ampacity) (A)(2) Receptacles that provide power for pool pump motors located between 10ft and 6ft from the pool no longer are required to employ a locking configuration (B)(6) Adds permission to install specific low voltage luminaires within 5 ft. of inside walls of permanent pools (A)(1) EX The exception allowing an existing feeder between and existing remote swimming pool panelboard and service equipment to be run in flexible metal conduit or an approved cable assembly has been revised to allow this exception for and feeder and remote swimming pool panelboard. Cable assembly is required to have an insulated EGC (C) The requirement for bonding of pool water has been revised (B) Equipotential bonding of perimeter surfaces is not required for outdoor spas and hot tubs with (4) specific conditions that must be met Has new provisions for rapid shutdown of PV systems on buildings when utility supply is de-energized within 10 seconds this originated from First Responders (C) Ground fault protection for ungrounded PV DC systems is required to be listed (D) An auxiliary grounding electrode system is required to be installed in accordance with and at all ground and pole mounted PV arrays and as close as practicable to roof mounted PV arrays New listing requirement for PV wire used in systems over 600 V not exceeding 2 kv Article 694 revised to apply to wind electric systems regardless of size previously it applied to 100 kw and less Requires listed surge protective devices (SPD s) for emergency systems switchboards and panelboards Branch circuit for emergency power or lighting are now restricted from being part of a multiwire branch circuit Requires emergency luminaries and external bypass controls to be individually listed for use in emergency systems where illumination is provided by one or more directly controlled luminaires Requires a licensed professional engineer or other qualified person to design the selective coordination 702.7(C) Requires warning sign placed near optional standby system power inlet for temporary connection to a portable generator Portable generator (rated 15 kw or less) using a flanged inlet or other cord and plug type connection is not required to have a disconnecting means where ungrounded conductors service or pass through a building or structure Mechanical Execution of Work requirements for fire alarm systems have been divided into two subsections and requirements for circuit integrity (CI) cables added A new definition and provisions have been added for INNERDUCT Page 4 of 5

5 2014 NEC Highlights of Major Changes Informative Annexes Informative Annex D Example D7 is new to describe how to apply revised (B)(7) by using the 83% factor rather than the former Table (B)(7) that was removed Informative Annex J is new for provisions to assist users of the Code to properly consider the 2010 American Disabilities Act (ADA) Standards for Accessible Design Protruding Objects Clearances Reach For more complete coverage of these and other revisions refer to: NFPA website - NEC Connect website - IAEI Analysis of Changes 2014 NEC. NECA website EC&M website NEC Adoption The 2014 National Electrical Code (NEC) was officially adopted by the National Fire Protection Association (NFPA) general membership on June 13th, 2013 at the NFPA Annual Meeting in Chicago, IL and issued by the Standards Council on August 1st, 2013, effective August 21st, 2013 concluding the 3-year cycle. There were 3,745 Proposals and 1,625 Public Comments for the 2014 NEC supporting documents: Page 5 of 5