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10. <br />11. <br /> <br />wall and floor mounted transformers and from front and bottom for suspended <br />transformers. <br />Brace and locate windings, terminals, and connections for maximum short circuit <br />stresses to prevent accidental grounding of windings and connections. <br />Include a diagrammatic nameplate mounted to enclosure showing tap <br />connections. <br />Provide transformers as manufactured by General Electric. <br />Furnish shop drawings for approval showing efficiencies at no load I/4, 1/2, 3/4 <br />and full load conditions, maximum decibel noise level, and temperature rise at <br />full load over 40 degrees C ambient condition. The sound levels of the <br />transformers shall not exceed those specified by NEMA and ANSI standards, <br />ANSI C89.1, Section 2.7.2. <br /> <br />2.20 GROUND FAULT <br /> <br />A. Ground fault indicator for main circuit breaker (provide as shown on drawings): <br /> <br />Ground fault indicator shall consist of a ground sensor encircling phase <br />conductors including neutral in a 4-wire system connected to a solid-state ground <br />relay which indicates the presence of a ground fault ahead of the main circuit <br />breaker. <br />Relay case shall be for internal surface mounting, time-current characteristic <br />shall provide 0.5 seconds operation at about 10 times pickup. <br /> <br />Part 3-Execution <br /> <br />3.01 Installation of Conduit <br /> <br />A. Concealed Conduit: <br /> <br />All conduit concealed, except in mechanical equipment rooms, and at <br />connections to surface panels and free standing equipment. <br /> <br />Coordinate electric conduits and pipes permitted to be embedded in structural <br />concrete work. Cooperate with respective trades to effect the following: <br /> <br />All reinforcing steel securely anchored in place before installing conduit <br />or pipe. <br /> <br />No steel displaced from plan dimensions without approval from <br />Owner/Engineer. <br /> <br />BASIC MATERIALS AND METHODS 16050-15 <br /> <br /> <br />