Electrical Design Standards Pdf
Carmina Piette
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Electrical design standards are sets of rules, specifications, and best practices that ensure the safety, efficiency, and reliability of electrical systems and equipment. Different industries have different electrical design standards, depending on their specific needs, applications, and regulations. How do you compare electrical design standards for different industries? In this article, we will explore some of the main factors and criteria that you should consider when comparing electrical design standards.
The first thing to consider when comparing electrical design standards is the scope and purpose of each standard. What kind of electrical systems and equipment are covered by the standard? What are the objectives and goals of the standard? How does the standard address the specific challenges and risks of the industry? For example, the National Electrical Code (NEC) is a widely used standard that covers the installation and maintenance of electrical systems in residential, commercial, and industrial buildings. The NEC aims to protect people and property from electrical hazards, such as fire, shock, and arc flash. On the other hand, the International Electrotechnical Commission (IEC) 61508 is a standard that covers the functional safety of electrical, electronic, and programmable electronic systems in various industries, such as automotive, aerospace, and nuclear. The IEC 61508 aims to ensure that the systems perform their intended functions without causing harm to people or the environment.
The next thing to consider when comparing electrical design standards is the structure and format of each standard. How is the standard organized and presented? How easy is it to access, understand, and apply the standard? How consistent and coherent is the standard with other related standards? For example, the Institute of Electrical and Electronics Engineers (IEEE) 1547 is a standard that covers the interconnection and interoperability of distributed energy resources with electric power systems. The IEEE 1547 is structured into a series of clauses, annexes, and sub-standards that cover different aspects and requirements of the interconnection process. The IEEE 1547 is also aligned with other IEEE standards, such as the IEEE 2030, which covers the smart grid. On the other hand, the American Petroleum Institute (API) RP 500 is a recommended practice that covers the classification of locations for electrical installations at petroleum facilities. The API RP 500 is formatted into a series of sections, figures, and tables that illustrate the classification criteria and methods. The API RP 500 is also compatible with other API standards, such as the API RP 14F, which covers the design and installation of electrical systems for offshore production platforms.
The last thing to consider when comparing electrical design standards is the content and quality of each standard. What kind of information and guidance does the standard provide? How comprehensive, accurate, and up-to-date is the standard? How relevant and applicable is the standard to the current and future needs of the industry? For example, the International Organization for Standardization (ISO) 50001 is a standard that covers the energy management systems for organizations. The ISO 50001 provides a framework and a methodology for establishing, implementing, maintaining, and improving the energy performance of the organization. The ISO 50001 is also based on the latest research and best practices in the field of energy efficiency and sustainability. On the other hand, the National Fire Protection Association (NFPA) 70E is a standard that covers the electrical safety in the workplace. The NFPA 70E provides requirements and recommendations for the prevention and protection of workers from electrical hazards, such as shock, arc flash, and electrocution. The NFPA 70E is also updated regularly to reflect the changes and developments in the electrical industry and technology.
Comparing electrical design standards for different industries can be a challenging and complex task, but it can also be a rewarding and beneficial one. By considering the scope and purpose, the structure and format, and the content and quality of each standard, you can gain a deeper and broader understanding of the electrical design principles and practices that apply to your industry and project. You can also identify the strengths and weaknesses, the similarities and differences, and the gaps and opportunities of each standard, and use them to improve your electrical design skills and outcomes.
Adoption of the 2010 Standards also establishes a revised reference point for Title II entities that choose to make structural changes to existing facilities to meet their program accessibility requirements; and it establishes a similar reference for Title III entities undertaking readily achievable barrier removal.
State and local government facilities must follow the requirements of the 2010 Standards, including both the Title II regulations at 28 CFR 35.151; and the 2004 ADAAG at 36 CFR part 1191, appendices B and D.
If the start date for construction is on or after March 15, 2012, all newly constructed or altered State and local government facilities must comply with the 2010 Standards. Before that date, the 1991 Standards (without the elevator exemption), the UFAS, or the 2010 Standards may be used for such projects when the start of construction commences on or after September 15, 2010.
(1) Each facility or part of a facility constructed by, on behalf of, or for the use of a public entity shall be designed and constructed in such manner that the facility or part of the facility is readily accessible to and usable by individuals with disabilities, if the construction was commenced after January 26, 1992.
(i) Full compliance with the requirements of this section is not required where a public entity can demonstrate that it is structurally impracticable to meet the requirements. Full compliance will be considered structurally impracticable only in those rare circumstances when the unique characteristics of terrain prevent the incorporation of accessibility features.
(ii) If full compliance with this section would be structurally impracticable, compliance with this section is required to the extent that it is not structurally impracticable. In that case, any portion of the facility that can be made accessible shall be made accessible to the extent that it is not structurally impracticable.
(iii) If providing accessibility in conformance with this section to individuals with certain disabilities (e.g., those who use wheelchairs) would be structurally impracticable, accessibility shall nonetheless be ensured to persons with other types of disabilities, (e.g., those who use crutches or who have sight, hearing, or mental impairments) in accordance with this section.
(1) Each facility or part of a facility altered by, on behalf of, or for the use of a public entity in a manner that affects or could affect the usability of the facility or part of the facility shall, to the maximum extent feasible, be altered in such manner that the altered portion of the facility is readily accessible to and usable by individuals with disabilities, if the alteration was commenced after January 26, 1992.
(ii) If it is not feasible to provide physical access to an historic property in a manner that will not threaten or destroy the historic significance of the building or facility, alternative methods of access shall be provided pursuant to the requirements of 35.150.
(4) Path of travel. An alteration that affects or could affect the usability of or access to an area of a facility that contains a primary function shall be made so as to ensure that, to the maximum extent feasible, the path of travel to the altered area and the restrooms, telephones, and drinking fountains serving the altered area are readily accessible to and usable by individuals with disabilities, including individuals who use wheelchairs, unless the cost and scope of such alterations is disproportionate to the cost of the overall alteration.
(A) Mechanical rooms, boiler rooms, supply storage rooms, employee lounges or locker rooms, janitorial closets, entrances, and corridors are not areas containing a primary function. Restrooms are not areas containing a primary function unless the provision of restrooms is a primary purpose of the area, e.g., in highway rest stops.
(B) For the purposes of this section, alterations to windows, hardware, controls, electrical outlets, and signage shall not be deemed to be alterations that affect the usability of or access to an area containing a primary function.
(A) An accessible path of travel may consist of walks and sidewalks, curb ramps and other interior or exterior pedestrian ramps; clear floor paths through lobbies, corridors, rooms, and other improved areas; parking access aisles; elevators and lifts; or a combination of these elements.
(C) Safe harbor. If a public entity has constructed or altered required elements of a path of travel in accordance with the specifications in either the 1991 Standards or the Uniform Federal Accessibility Standards before March 15, 2012, the public entity is not required to retrofit such elements to reflect incremental changes in the 2010 Standards solely because of an alteration to a primary function area served by that path of travel.
(A) Alterations made to provide an accessible path of travel to the altered area will be deemed disproportionate to the overall alteration when the cost exceeds 20 % of the cost of the alteration to the primary function area.
(A) When the cost of alterations necessary to make the path of travel to the altered area fully accessible is disproportionate to the cost of the overall alteration, the path of travel shall be made accessible to the extent that it can be made accessible without incurring disproportionate costs.
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