What Is a Single-Line Diagram, What Is Its Purpose, and What

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The Answer is A single-line diagram is an electrical schematic diagram for the utility interactive PV system.
Relative physical location of components is not the purpose of this plan sheet.A simplified electrical connection diagram is the goal.Quantity of modules in the array along with the quantity of modules per string must be indicated.Electrical size and specifications for the dc and ac
disconnects, combiner boxes, inverters, and ac combiner panels are necessary information.Existing electrical service size, main circuit breaker size, and the size of any existing ac panels that are part of the design will need to be indicated.All conductor types and sizes along with conduit/raceway types and sizes must be shown.The overcurrent device (fuses, circuit breakers) ratings are needed to verify correct sizing of these components.
Grounding and bonding is of extreme importance for the utility interactive photovoltaic system and must be accurately indicated on the single-line diagram.Types of existing or new grounding electrodes must be specified along with all grounding electrode conductor sizes and connection points.Individual PV modules are required to be grounded per the manufacturer's instructions so connection of the equipment grounding conductor to the module is of extreme importance and must be detailed.Finally, it is critical that the method of utility interconnection be specified.

What Is a Single-Line Diagram, What Is Its Purpose, and What

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