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6 Electrical Connection SMA Solar Technology AG <br />Installation ManualSBxx-1SP-US-41-IA-xx-12 42 <br />6.5 Connecting the switch and outlet for secure power <br />supply operation <br />Neutral and grounding conductor of output for secure power supply <br />permanently connected <br />The inverter's output for secure power supply includes a permanent connection between <br />neutral and grounding conductor, which cannot be disconnected. <br />Do not connect loads that require a stable electricity supply to the outlet for <br />secure power supply operation. <br />Secure power supply operation must not be used for loads that require a stable electricity <br />supply. The power available during secure power supply operation depends on the solar <br />irradiation on the PV system. Therefore, power output can fluctuate considerably depending <br />on the weather or may not be available at all. <br />• Do not connect loads to the outlet for secure power supply operation if they are <br />dependent on a stable electricity supply for reliable operation. <br />Requirements: <br />☐ The technical requirements for connecting the switch and outlet for secure power supply <br />operation must be met(see Section 10 "Technical Data", page 65). <br />☐ All electrical installations must be carried out in accordance with the local standards and the <br />National Electrical Code ® ANSI/NFPA 70 or the Canadian Electrical Code® CSA C22.1. <br />Residual-current device: <br />☐ SMA Solar Technology AG recommends installing a residual-current device (type A) between <br />the inverter's output for secure power supply and the outlet for secure power supply operation, <br />which trips at a residual current of 30 mA. Observe all locally applicable standards and <br />directives when doing so. <br />Additionally required material (not included in the scope of delivery): <br />☐ 1 standard outlet <br />☐ 1 standard switch (e.g. light switch) <br />☐ Conduits (trade size: 21 mm (0.75 in) or smaller with suitable reducer bushing) <br />☐ UL-listed raintight or liquidtight conduit fittings (trade size: 21 mm (0.75 in) or smaller with <br />suitable reducer bushing) <br />Procedure: <br />• Connect the outlet for secure power supply operation <br />• Connecting the switch for secure power supply operation <br />EN <br />G <br />L <br />I <br />S <br />H <br />534 S Sycamore St <br />- 10110979707/01/22