BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:America/Los_Angeles BEGIN:DAYLIGHT DTSTART:20220313T030000 TZOFFSETFROM:-0800 TZOFFSETTO:-0700 RRULE:FREQ=YEARLY;BYDAY=2SU;BYMONTH=3 TZNAME:PDT END:DAYLIGHT BEGIN:STANDARD DTSTART:20221106T010000 TZOFFSETFROM:-0700 TZOFFSETTO:-0800 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=11 TZNAME:PST END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20220529T174856Z UID:698D3708-851D-4284-B74E-06E9F81D803B DTSTART;TZID=America/Los_Angeles:20220526T120000 DTEND;TZID=America/Los_Angeles:20220526T130000 DESCRIPTION:NEC 690 Presentation Overview\n\nNEC Article 690 covers the req uirements of the engineering and construction of solar photovoltaic system s. In just a few iterations of the NEC\, Article 690 has transformed consi derably. Essential calculations\, including module open circuit voltage an d short circuit current have evolved and bifacial modules have enhanced th e need for refined calculations. This presentation will address these topi cs along with an understanding of the risk associated with different inter pretations and calculation methodologies.\n\n======\nCode requirements for the Photovoltaic Power Systems NEC (National Electrical Code) section 690 .\n\nPart II of Article 690 provides the circuit requirements for PV syste ms vs wiring methods and materials (covered in Part IV)\n\n- With the 2020 NEC Section 600.7 was rewritten - when determining the maximum voltage of PV system dc circuits. Conductors\, equipment\, and working space require s the voltage.\n- Maximum Current. For example\, if your PV system has an inverter capable of under 100KW then the maximum current is the sum of the short-circuit current ratings of the PV modules connected in parallel mul tiplied by 125%. But if the inverter is capable of 100KW or more\, then yo u can use a different method and be documented and stamped (by a licensed PE) PV system design [690.8(A)(1) and (2)].\n- If a circuit is protected b y an OCPD (over current protective device) not exceeding the conductor amp acity the maximum current value is equal to the rated input current of the electronic power converter input to which it is connected [690.8(B)].\n- Maximum current calculations\, in 690.8(C) and 690.8(D). These are "System s with Multiple Direct-Current Voltages" and "Sizing of Module Interconnec tion Modules"\, respectively.\n- The overcurrent protection rules are in 6 90.9. 1- PV system dc circuit and inverter output conductors and equipment must be protected against overcurrent.\n- Overcurrent protection is not r equired in some cases\, for example where the conductor ampacity is suffic ient for the maximum current [690.9(A)(1)]. Circuits where overcurrent pro tection is required only at one end [690.9(A)(2)]. There are "other circui ts"\, which are those that don't comply with either of the preceding requi rements. Those must be protected by one of the methods listed in 690.9(A)( 3).\n- Any OCPD you use in a PV system must be listed for use in PV system s [690.9(B)].\n- If the PV system is a stand-alone system\, install it per the requirements of 710.15 [690.10]. Article 710 provides the requirement s for stand-alone systems.\n- Arc fault protection is required for any PV system with PV circuits operating at 80 VDC or greater (between any two co nductors) [690.11].\n- Any PV system installed in or on a building must ha ve a rapid shutdown function [690.12]. The reason for it is to protect fir efighters.\n\nCo-sponsored by: IEEE PES (Power Energy Society)\n\nSpeaker( s): Mike Brisbois\, Nicholas Mechler\n\nAgenda: \n12:00 pm PDT IEEE Announ cements\n12:02 pm PDT Introduction of the Speaker\n12:04 pm PDT Presentati on\n12:45 pm PDT Q&A\n\nSeattle\, Washington\, United States\, 98121 LOCATION:Seattle\, Washington\, United States\, 98121 ORGANIZER:mike.brisbois@ieee.org SEQUENCE:23 SUMMARY:NEC 690 Photovoltaic Power Systems URL;VALUE=URI:https://events.vtools.ieee.org/m/314475 X-ALT-DESC:Description: <br /><p><strong>NEC 690 Presentation Overview</str ong></p>\n<p>NEC Article 690 covers the requirements of the engineering an d construction of solar photovoltaic systems. In just a few iterations of the NEC\, Article 690 has transformed considerably. Essential calculations \, including module open circuit voltage and short circuit current have ev olved and bifacial modules have enhanced the need for refined calculations . This presentation will address these topics along with an understanding of the risk associated with different interpretations and calculation meth odologies.</p>\n<p>======<br />Code requirements for the Photovoltaic Powe r Systems NEC (National Electrical Code) section 690.</p>\n<p>Part II of A rticle 690 provides the circuit requirements for PV systems vs wiring meth ods and materials (covered in Part IV)</p>\n<ol>\n<li>With the 2020 NEC Se ction 600.7 was rewritten - when determining the maximum voltage of PV sys tem dc circuits. Conductors\, equipment\, and working space requires the v oltage.</li>\n<li>Maximum Current. For example\, if your PV system has an inverter capable of under 100KW then the maximum current is the sum of the short-circuit current ratings of the PV modules connected in parallel mul tiplied by 125%. But if the inverter is capable of 100KW or more\, then yo u can use a different method and be documented and stamped (by a licensed PE) PV system design [690.8(A)(1) and (2)].</li>\n<li>If a circuit is prot ected by an OCPD (over current protective device) not exceeding the conduc tor ampacity the maximum current value is equal to the rated input current of the electronic power converter input to which it is connected [690.8(B )].</li>\n<li>Maximum current calculations\, in 690.8(C) and 690.8(D). The se are "Systems with Multiple Direct-Current Voltages" and "Sizing of Modu le Interconnection Modules"\, respectively.</li>\n<li>The overcurrent prot ection rules are in 690.9. 1- PV system dc circuit and inverter output con ductors and equipment must be protected against overcurrent.</li>\n<li>Ove rcurrent protection is not required in some cases\, for example where the conductor ampacity is sufficient for the maximum current [690.9(A)(1)]. Ci rcuits where overcurrent protection is required only at one end [690.9(A)( 2)]. There are "other circuits"\, which are those that don't comply with e ither of the preceding requirements. Those must be protected by one of the methods listed in 690.9(A)(3).</li>\n<li>Any OCPD you use in a PV system must be listed for use in PV systems [690.9(B)].</li>\n<li>If the PV syste m is a stand-alone system\, install it per the requirements of 710.15 [690 .10]. Article 710 provides the requirements for stand-alone systems.</li>\ n<li>Arc fault protection is required for any PV system with PV circuits o perating at 80 VDC or greater (between any two conductors) [690.11].</li>\ n<li>Any PV system installed in or on a building must have a rapid shutdow n function [690.12]. The reason for it is to protect firefighters.</li>\n< /ol><br /><br />Agenda: <br /><p>12:00 pm PDT IEEE Announcements<br />12:0 2 pm PDT Introduction of the Speaker<br />12:04 pm PDT Presentation<br />1 2:45 pm PDT Q&amp\;A</p> END:VEVENT END:VCALENDAR