<?xml version="1.0" encoding="UTF-8" standalone="no"?><?Xpress productLine="ncc-clause" ?><clause id="_e5515ad7-2332-4020-bd5a-c2a344120fac" outputclass="ncc-clause"><meta><facet building="Class 1a"/><facet building="Class 1b"/><facet building="Class 10a"/><facet building="Class 10b"/><facet building="Class 10c"/></meta><sptc>S31C20</sptc><title id="_5dac3a94-f0ee-42d3-928b-a0fb1d2ec252">Standby power system</title><archive-num>2019: Spec G3.8: 6</archive-num><subclause id="_7081fdd7-b61f-41dd-825f-46beef801a64" outputclass="subclause"><title id="_9bd7a447-4ed0-4ac8-af51-f737cda1804a">SubClause</title><num>1</num><p>If a <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1432_4.0.0.xml#_af6fde9f-147d-4782-8b85-42044e80fd42" id="_6de12aeb-6469-4a30-ade6-d858743fa835" scope="local" type="abcb-glossentry">required</xref> path of travel to an <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1263_2.3.0.xml#_9712f630-8cf7-401b-b1cc-ae0be4485915" id="_6164dc77-09a1-4aa4-94ca-15da47ff328d" referencetype="Text" scope="local" synctargettext="false" type="abcb-glossentry">exit</xref> is within an <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1197_1.0.0.xml#_d0042ee6-21cd-4d8c-8873-d8bfb694ceff" id="_7ef6ec1f-d679-416e-9506-2aefe5888665" scope="local" type="abcb-glossentry">atrium</xref>, a suitable alternative power supply must be provided to operate <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1432_4.0.0.xml#_af6fde9f-147d-4782-8b85-42044e80fd42" id="_0b266067-08d1-4788-b31b-4f266dd65964" scope="local" type="abcb-glossentry">required</xref> safety systems, including sprinkler systems and fire hydrant pumps, air handling systems, alarms, warning and communication systems and emergency lighting circuits.</p></subclause><subclause id="_9987ca8a-d7bd-4889-b3d6-35efe54af369" outputclass="subclause"><title id="_79fc47fa-12bc-4616-a43d-7a03cce0fe44">SubClause</title><num>2</num><p>The alternative power supply must—</p><ol outputclass="alpha"><li id="_fb11cba0-11ea-42db-868b-3a2012cfb353">be connected <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1199_0.7.0.xml#_ac370c9b-7389-4daa-ac5b-338e11dc43e7" id="_04f77510-0696-4925-83c7-3ad34b13de24" scope="local" type="abcb-glossentry">automatically</xref> if the normal power supply fails; and</li><li id="_65d078c3-2ced-471c-865e-5fa9fdc7219c">if located within the building, be separated from the remainder of the building by an enclosure with an FRL of at least 120/120/120; and</li><li id="_5b765cb1-af0f-4f64-901a-95ce1c183c4b">be connected to the safety systems by means of cabling complying with <xref format="dita" href="qpp://assets/1310#_33ab39e0-00fb-4473-b282-62717743d638" id="_b169da44-775b-4d74-ba99-2281f32e01ca" publishing-id="vol1" scope="external" type="subclause">C3D14(3)</xref>.</li></ol></subclause><subclause id="_69fe12d1-37ea-491c-8557-7687225f637d" outputclass="subclause"><title id="_1a44763f-94c0-44f7-b703-ca6c45af83b5">SubClause</title><num>3</num><p>The requirements of (1) are satisfied by—</p><ol outputclass="alpha"><li id="_6a42323a-6e7f-4acf-9aa5-160d3b8c5312">a single medium voltage supply taken from an electricity substation situated within, or adjacent to, the building concerned where the power supply to the substation consists of two or more high voltage cables each taking electricity from separate transformers; or</li><li id="_d7c7a727-4e29-452b-958d-4141c3026779">two or more medium voltage supplies each taking electricity from separate electricity substations situated—<ol><li>outside the building concerned; and</li><li>at a suitable distance from each other; or</li></ol></li><li id="_01ac9276-6ceb-458e-8c5a-4b94159a96b7">a single medium voltage supply taken from an electricity substation together with an electricity generating plant capable of—<ol><li>generating a medium voltage supply; and</li><li>starting and taking the <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1432_4.0.0.xml#_af6fde9f-147d-4782-8b85-42044e80fd42" id="_d656aaca-89f7-46f5-80fc-febab28a7946" scope="local" type="abcb-glossentry">required</xref> electrical load within a period of not more than 30 seconds from the time of normal supply failure.</li></ol></li></ol></subclause></clause>