Photovoltaic support line positioning requirements

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About Photovoltaic support line positioning requirements

New to the NEC 2020 we have section 705.11 which helps us understand how to make supply-side connections more clearly than previous iterations. To this point, installers have been making supply-side connections in PV systems following the Code to the best of their ability.

Some solar PV systems use a support system that incorporates enclosed electrical wireways (channels) and interconnecting electrical conduits that are used to provide structural support for the individual solar PV modules and they also serve as raceways for electrical circuit.

The National Electric Code allows for a few different ways to interconnect PV systems to utility systems. In two editions of Code Corner, Ryan Mayfield with Mayfield Renewables, explains busbar, load side interconnections in 705.12 (B) (3) (1) and (2), and then supply side connections in 705.11 (C) and (D). Mayfield Renewables Code Corner .

1. The following preparations shall be made before the installation of photovoltaic support and module. 1) Set up unloading platform and personnel walkway at the corresponding position of each plant, and lay bulk material channel on the roof to avoid damage to the roof.

The energy output of a solar energy system is optimized by siting the array where the roof is oriented due south at an 180o azimuth (on a compass dial that is corrected for magnetic declination). For the purpose of this specification and checklist, proposed orientations that deviate from an 180o azimuth. Table 1.

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6 FAQs about [Photovoltaic support line positioning requirements]

Do you need a pull line for a solar PV system?

To facilitate the wiring of the solar PV system at a later date, the builder may also want to include a pull line in the conduit, particularly if the conduit run is lengthy or has multiple bends.

What is a photovoltaic solar system code section?

This collection of provisions imports code sections which address Photovoltaic Solar Systems, and the structural, fire safety and energy conservation measures for them. These are specific to Solar Systems.

Does a roof support solar photovoltaic panels or modules?

The structure of a roof that supports solar photovoltaic panels or modules shall be designed to accommodate the full solar photovoltaic panels or modules and ballast dead load, including concentrated loads from support frames in combination with the loads from Section CS507.1.1.1 (IBC 1607.12.5.1) and other applicable loads.

Are solar panels required for a roof photovoltaic live load?

Solar photovoltaic panels or modules that are independent structures and do not have accessible/occupied space underneath are not required to accommodate a roof photovoltaic live load, provided the area under the structure is restricted to keep the public away.

Do PV systems have supply-side connections?

To this point, installers have been making supply-side connections in PV systems following the Code to the best of their ability. But with some admittedly vague rules around a few key issues, we wanted to address supply-side connections here.