Lift control panel design6/22/2023 ![]() UL 508 was one of the most important standards to recognize for many years, but this standard has recently been phased out and has been replaced by UL 6. Portions of NFPA 79 relate to control circuits and control functions, operator interface and control devices, location, mounting, and enclosures for control equipment, and other topics relevant to the design of industrial control panels. ![]() NFPA 79 provides safeguards for industrial machinery aimed at protecting operators, equipment, facilities, and work-in-progress from fire and electrical hazards. The scope of this standard encompasses electrical and electronic elements of all machinery that operates at or below 600V, including injection molding machines, assembly machinery, machine tools, and material handling machinery, among others, as well as inspection and testing machinery. NFPA (National Fire Protection Association) 79 is a section of the NEC that pertains to wiring standards for industrial machinery. The kA value must be greater than the kA value of the incoming source in order for the panel to be installed. The smallest kA value is used as the kA value for the panel as a whole. Article 409 specifies that industrial control panels must be evaluated and marked for their Short Circuit Current Rating (SCCR), which is established by evaluating each feeder individually as well as all branch circuits. The NEC is adopted by state or by region to standardize the enforcement of safe electrical practices.Īrticle 409 covers industrial control panels and applies to panels intended for general use at 600 volts or less, in ordinary locations. The National Electrical Code (NEC), or NFPA 70, is a widely-accepted standard for the safe installation of electrical equipment and wiring. Like all regulatory standards, industrial control panel standards are subject to change over time, and in fact, one of the most relevant standards, UL 508, has recently been phased out and replaced by an updated, harmonized international standard.īecause of the changing nature of regulatory standards, it’s important to stay up-to-date on current requirements. Compliance, however, is critical for ensuring minimal safety risks associated with installing and operating industrial equipment and machinery.īelow is an overview of the most prominent regulations applicable to the design, manufacture, and installation of industrial control panels. Regulatory Standards Related to Industrial Control Panel Designĭespite many Code cycles, many industrial control panels are still not compliant with the regulatory standards which are accepted industry-wide. The schematic is the foundation for the subsequent development of an industrial control panel. These drawings should include:īecause there are so many elements in a proper schematic, a table of contents is also recommended. Good design addresses both the electrical and physical requirements. After these considerations are evaluated, drawings are created to outline the specific configuration of wiring, circuits, controls, and every other aspect of the final control panel. The process should always begin with an evaluation of the specifications, requirements, and regulatory standards. So, the proper hardware must be mounted on a back panel and properly wired and integrated into the machine – any improper configuration can result in malfunctioning machinery, but it’s also likely to pose an unnecessary risk to operators. ![]() Industrial Control Panel Design – SchematicsĬontrol panel design for industrial equipment and machinery is an important undertaking, resulting in an interface designed to control a machine or process. It’s not a simple matter of selecting an appropriate enclosure and a back panel that houses the electrical hardware.
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