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20.20.027 <br />branch circuits. In all installations, <br />the rating of the over current device <br />connected to the output of the in- <br />verter shall be less than the rating of <br />the neutral bus in the service equip- <br />ment. This equipment shall be <br />marked with the following words or <br />equivalent: <br />WARNING <br />SINGLE 120-VOLT SUPPLY, DO <br />NOT CONNECT MULTIWIRE <br />BRANCH CIRCUITS! <br />III. Disconnecting Means <br />690.13 All Conductors. <br />Means shall be provided to discon- <br />nect all current-carrying conductors <br />of a photovoltaic power source from <br />all other conductors in a building or <br />other structure. Where a circuit <br />grounding connection is not designed <br />to be automatically interrupted as <br />part of the ground-fault protection <br />system required by 690.5, a switch or <br />circuit breaker used as a disconnect- <br />ing means shall not have a pole in <br />the grounded conductor. <br />FPN: The grounded conductor <br />may have a bolted or terminal dis- <br />connecting means to allow main- <br />tenance or troubleshooting by <br />qualified personnel. <br />690.14 Additional Provisions. <br />Photovoltaic disconnecting means <br />shall comply with 690.14(A) through <br />(C). <br />(A) Disconnecting Means. The dis- <br />connecting means shall not be re- <br />quired to be suitable as service <br />equipment and shall be rated in ac- <br />cordance with 690.17. <br />(B) Equipment. Equipment such as <br />photovoltaic source circuit isolating <br />switches, over current devices, and <br />blocking diodes shall be permitted on <br />the photovoltaic side of the photovol- <br />taic disconnecting means. <br />(C) Requirements for Disconnecting <br />Means. Means shall be provided to <br />disconnect all conductors in a build- <br />ing or other structure from the photo- <br />voltaic system conductors. <br />(1) Location. The photovoltaic <br />disconnecting means shall be in- <br />stalled at a readily accessible <br />location either outside of a build- <br />ing or structure or inside nearest <br />the point of entrance of the sys- <br />tem conductors. <br />The photovoltaic system discon- <br />necting means shall not be in- <br />stalled in bathrooms. <br />(2) Marking. Each photovoltaic <br />system disconnecting means shall <br />be permanently marked to identify <br />it as a photovoltaic system discon- <br />nect. <br />(3) Suitable for Use. Each pho- <br />tovoltaic system disconnecting <br />means shall be suitable for the <br />prevailing conditions. Equipment <br />installed in hazardous (classified) <br />locations shall comply with the re- <br />quirements of Articles 500 <br />through 517. <br />(Pleasanton April 2003) '] 10_22 <br />