95 Application Guide Changeover Switches Guidance on the use of K&N Changeover Switches Standard - AS/NS 3010:2005 Electrical Installations Generating Sets 2.5.5.4 Changeover device with intermediate ‘OFF’ position A permanently connected changeover device having an intermediate ‘OFF’ position may be used in place of a main switch or a switch controlling sub mains or final sub circuits, such that the supply may be obtained from either of two sources and isolated from both. NOTE: Changeover devices having an intermediate ‘OFF’ position would normally be used for manual operation only. 2.5.5.10 Three pole/three pole changeover devices A three pole/three pole changeover device may be used to connect a generating set at a switchboard. Where a three/three pole changeover device is used, the generating set neutral and earth conductors shall be connected as shown in figures 2.2 or 2.4 2.5.5.11 Threepole/four pole changeover devices A three pole/four pole changeover device may be used to connect a generating set at a switchboard. Where a three/four pole changeover device is used, the generating set neutral and earth conductors shall be connected as shown in figures 2.3 or 2.8 NOTE: Figures referred to above can be reviewed in the standard. Our drawings on pages 26 and 28 are electrically the same. Standard - AS/NS 3000:2007 Wiring Rules 7.3.8.1.2 Switching AS/NZS 3010 provides guidance for connection and switching of alternative supplies and compliance with AS/NZS 3010 is deemed to satisfy clause 7.3.8.1 NOTE: Typical arrangements are shown in figures 7.2.7.3 and 7.4 NOTE: Figures referred to above can be reviewed in the standard. Our drawings on pages 26 and 28 are electrically the same. Application Guide Changeover Switches
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