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-- <br />TECHNICAL BRIEF [e] enphaseENERGY <br />Enphase Microinverters with Integrated Ground (IG) <br />Enphase's latest generation microinverters feature Integrated (DC isolated) Ground. Because the DC <br />circuit is isolated and insulated from ground, these microinverters do not require a Grounding Electrode <br />Conductor (GEC) connected between each microinverter. This means you don't need to attach a <br />separate copper grounding conductor to each microinverter or worry about a continuous run to ground. <br />The result is faster installation with lower materials costs and a safer system. <br />Integrated Ground and Code Requirements <br />Solar installers must comply with the National Electrical Code (NEC) when installing Enphase <br />Microinverters. Enphase Microinverters with Integrated Ground meet the requirements specified for <br />Ungrounded PV Power Systems in sections 690.35 and 690.41 of the 2008,2011and 2014 NEC. It also <br />meets the Underwriters Laboratory (UL) Standard 1741 grounding requirements. <br />For further information, refer to the whitepaper on Enphase Microinverters and Ungrounded PV Arrays <br />and other materials at'*WOD:en*phase.66'm/Groundina. <br />Identifying Microinverters <br />with Integrated Ground <br />Installers and inspectors can easily <br />identify Enphase Microinverters with <br />Integrated Ground. <br />h <br />No grounding <br />terminal <br />Flat lid <br />Installing Microinverters Product label <br />with Integrated Ground edge <br />on bottom <br />Enphase Microinverters ship with DC and <br />AC cables and connectors. The DC connectors attach to the PV module, while the AC connector attaches <br />directly to the Engage™ Cable. lt's that simple: no additional cabling is needed. <br />About System Grounding <br />Electrical code requires two types of grounding conductors-the Grounding Electrode Conductor (GEC), <br />which is used between the grounding electrode and the point where a normally current carrying conductor <br />is intentionally bonded to ground and the Equipment Grounding Conductor (EGC), which grounds non- <br />current carrying metal parts of the system, such as the racking and module frames. <br />Because Enphase Microinverters with Integrated Ground have DC integrated ground, they do not require <br />a GEC. However electrical code still requires that exposed metal in the array be grounded (NEC 690.43 <br />and 250.136(A)). This requirement is met for the microinverter because the ground conductor internal to <br />the Engage Cable acts as the EGC. It may be met for racking and modules with use of an EGC or <br />WEEBs to provide bonding to this ground system. <br />© 2014 Enphase Energy Inc.All rights reserved.January 2014 <br />r C