Photovoltaic inverter bonding machine

Why is a PV system bonded?

“Bonding and grounding PV systems ensures public safety, as well as the safety of PV installers and field electricians,” said Andy Zwit, Codes and Standards Manager at ILSCO. Excluding modules, the majority of components in PV systems are bonded like any other electrical system.

What components are bonded to a PV system?

Excluding modules, the majority of components in PV systems are bonded like any other electrical system. For example, grounding busbars are connected to the metal chassis of enclosures, such as disconnect switches, combiner boxes and inverters, and then an equipment grounding conductor (EGC) is connected to the busbar, Mehalic explained.

Should PV equipment be bonded?

That being said, PV equipment needs to be properly bonded so that the low current flows on metal parts can open smaller string level overcurrent devices, if installed, and also facilitate the operation of dc ground-fault protective devices. Figure 1. Location of Grounding Conductors in a Grounded PV System

What are the bonding and grounding requirements for PV systems?

The specific bonding and grounding requirements for PV systems in Article 690 are in Part V. Section 690.41 covers system grounding, allowing both grounded and ungrounded PV array conductors.

Why is grounding and bonding a PV system difficult?

A number of factors make the grounding and bonding of a PV system difficult. PV systems are exposed to the elements, which can result in atypical situations where the usual practices for bonding may not perform as intended.

What devices must be listed for bonding PV modules?

(A) Photovoltaic Module Mounting Systems and Devices. Devices used to secure and bond PV module frames to metal support structures and adjacent PV modules must be listed for bonding PV modules.