Installation Guide

6 Electrical Connection

SMA Solar Technology AG

Installation Manual SBxx-1SP-US-40-IA-xx-15 31

Position Designation

Pin connector BAT is not used

O Equipment grounding terminal for the equipment grounding conductors of

the PV array

P Communication assembly

Jack DISPLAY for the LED assembly connection in the enclosure lid of the

Connection Unit

6.2 AC Connection

6.2.1 Requirements for the AC Connection

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

☐ Conduits (trade size: 21mm (0.75in) or smaller with suitable reducer bush)

☐ UL-listed raintight or liquidtight conduit fittings (trade size: 21mm (0.75in) or smaller with

suitable reducer bush)

Requirements on the AC conductors:

☐ The maximum permitted temperature of the terminal block for AC connection of 105°C

(221°F) must be observed.

☐ 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 at SB3.0-1SP-US-40, SB3.8-1SP-US-40, SB5.0-1SP-US-40

and SB6.0-1SP-US-40: 75°C (+167°F)

☐ Maximum permissible temperature for SB7.0-1SP-US-40 and SB7.7-1SP-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: 4mm² to 16mm² (12AWG to 6AWG)

Load-break switch an cable protection:

☐ 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65). This will prevent residual voltage from being present at the corresponding

conductor after disconnection.

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

ANSI/

NFPA 70) or Canadian Electrical Code

CSA C22.1).

☐ Loads installed between the inverter and the overcurrent protective device must be fused

separately.

☐ The overcurrent protective device for the AC output circuit is to be provided by others.

ENGLISH