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The primary reason for the use of isolated grounds (IG) is to provide a noise-free ground return, separate from the equipment grounding (EG) return. The EG circuit includes all of the metal conduit, outlet boxes, and metal enclosures that contain the wiring and must be grounded to provide a safe return path in case of fault currents.
Common Chassis Ground – isolation between circuit common and chassis (chassis grounded). Isolated Circuit Common – isolation between circuit common and chassis (chassis floating). Isolation measurements are made with the assembly or subsystem unpowered and disconnected from any support equipment.
The use of the term ground (or earth) is so common in electrical and electronics applications that circuits in portable electronic devices, such as cell phones and media players, as well as circuits in vehicles, may be spoken of as having a "ground" or chassis ground connection without any actual connection to the Earth, despite "common" being ...
A building code (also building control or building regulations) is a set of rules that specify the standards for construction objects such as buildings and non-building structures. Buildings must conform to the code to obtain planning permission , usually from a local council.
Even if an isolation transformer is used, hazardous voltages may still be present between components of the isolated device. Thus it is still possible for an operator to be exposed to lethal voltages by touching multiple elements in the circuit. An isolation transformer provides maximum protection when the device is ungrounded.
The International Green Construction Code (IGCC) is a set of guidelines that aim to improve the sustainability and environmental performance of buildings during their design, construction, and operation. It was introduced by the International Code Council (ICC), a non-profit organization that provides building safety and fire prevention codes ...
The CSI Project Delivery Practice Guide (PDPG) is the introductory volume in the Practice Guide Series. The PDPG presents an overview of the process needed to conceive, design, construct, and maintain a construction project. This Guide describes the many parts of that process and the inter-related roles of the various participants in the process.
Section through railway track and foundation showing the sub-grade. Grading in civil engineering and landscape architectural construction is the work of ensuring a level base, or one with a specified slope, [1] for a construction work such as a foundation, the base course for a road or a railway, or landscape and garden improvements, or surface drainage.