Installation Manual

Position Designation

P Equipment grounding terminals for the equipment grounding conductors of the PV

array

Q Communication assembly

DISPLAY socket for connecting the display cable

6.3 AC Connection

6.3.1 Requirements for the AC Connection

Additionally required material (not included in the scope of delivery):

☐ Conduits: 21mm (0.75in) or smaller with a proper reducing bush

☐ Rain-tight conduit fittings for wet locations complying with UL 514B: 21mm (0.75in) or

smaller with a proper reducing bush

Requirements for the AC conductors:

☐ The AC connecting terminal plate temperature rating is +90°C (+194°F).

☐ The conductors with regards to its ampacity, rated temperatures, operating conditions and its

power loss must be made in accordance with the local standards and the National Electrical

Code

ANSI/NFPA 70 or the Canadian Electrical Code

CSA C22.1.

☐ Conductor type: copper wire

☐ Maximum permissible temperature for SB3.0-1SP-US-40, SB3.8-1SP-US-40, SB5.0-1SP-US

and SB6.0-1SP-US: +75°C (+167°F)

☐ Maximum permissible temperature for SB7.0-1SP-US-40 and SB 7.7-1SP-US-40: +90°C

(+194°F)

☐ The conductors must be made of solid wire, stranded wire or fine stranded wire. When using

fine stranded wire, bootlace ferrules must be used.

☐ Conductor cross-section: 6mm² to 16mm² (10AWG to 6AWG)

Load-break switch an cable protection

Damage to the inverter due to the use of screw-type fuses as load-break switch

Screw-type fuses are not load-break switches.

• Do not use screw-type fuses as load-break switches.

• Use a load-break switch or a circuit breaker for load disconnection.

☐ In PV systems with multiple inverters, protect each inverter with its own overcurrent protective

device. Observe the maximum permissible fuse protection (see Section10 "Technical Data",

page60). This will prevent residual voltage from being present at the corresponding cable

after disconnection.

☐ The load-break switch or circuit breaker must be listed (see National Electrical Code

ANSI/

NFPA 70).

6 Electrical Connection

SMA Solar Technology America LLC

Installation ManualSB30-77-1SP-US-40-IA-xx-1328

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