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grounding your solar electric system

According to the National Electric Code (NEC), all solar panel systems need to be grounded to code. At a minimum the NEC requires that all systems must have equipment-grounding conductors that connect the metal surfaces of the solar panels to a ground rod. typically grounding systems include the following items: code compliant ground lugs screwed into each aluminum rail that touches the solar panel grounding rod driven into the earth near the solar panels stranded copper wire or solid wire connected to the ground lugs and then to the ground rod. In Europe, grounding is not required, although here in the US it’s a must, Homepower ran an excellent article about solar electric system grounding, check it out...

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the point of grid interconnection

Weather you’re connecting a solar electric system or a wind turbine to the grid you will require a point of interconnection. The NEC (National Electric Code) allows a grid tie inverters to be connected on the load side of your electrical service disconnecting means. Each grid tie inverter must be connected by its own dedicated circuit breaker or fuse. There was a change in the 2008 NEC that allows the sum of the supply breakers to be 120% of the busbar ratings for both commercial and residential solar pv installations. This change in the NEC rules allows small solar pv systems to be interconnected without having to upgrade the service panel. Grid interconnection is quite complex, it’s not as easy as simply wiring your grid tie inverter into the service panel. This information is good to know weather your the person conducting the installation or intend to hire a professional to grid tie your solar electric system, you must make sure your installation is up to NEC...

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National Electric Code and Solar Electric Systems.

What’s the National Electric Code (NEC) all about? You’ve probably heard this term if your considering to install solar panels yourself. The code refers to the United Standards for the safe installation of wiring and electrical equipment. The NEC is part of the fire code and is written by National Fire Protection Association (NFPA) the comprehensive and authoritative safety standard includes best pratices for solar electric systems. If you are considering installing solar electric system yourself or want to learn more about the saftey standards of installing solar pv systems, you should use the 2005 NEC code as a starting point in your jorney. You can download the NEC 2oo5, through this...

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Intergrated Inverter DC/AC Disconnects

Disconnects for safety reasons rapidly disconnect from a power source. Disconnects are on / off switches and are required by National Electrical Code (NEC). With a solar power system for your system to pass inspection and meet all UL and NEC requirements your system must have a DC/AC Disconnects. Over the last few years inverter manufactures have been integrating dc, ac or DC & AC disconnects right into the inverter or as an external unit. Many inspectors are familiar with integrated DC / AC disconnects which is a good sign of the wide acceptance. The picture above shows a SMA Sunny Boy Inverter with an integrated disconnect, a knob style switch quickly shuts off the power in case of an...

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