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ANSI C119.1 2011 Edition, January 1, 2011
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Electric Connectors— Sealed Insulated Underground Connector Systems Rated 600 Volts
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ANSI/NEMA MW 1000, 2014
This standard covers sealed, insulated underground connector systems rated at six hundred (600) volts for utility applications and establishes electrical, mechanical, and sealing requirements for sealed underground connector systems.


The purpose of this standard is to give reasonable assurance to the user that sealed, insulated underground connector systems meeting the requirements of this standard will perform in a satisfactory manner, provided they have been properly selected for the intended application and are installed in accordance with the manufacturer’s recommendations.