Ac Connection; Requirements For The Ac Connection - SMA SUNNY BOY 3.0-US Instrucciones De Instalación

6 Electrical Connection
Position Designation
P Equipment grounding terminals for the equipment grounding conductors of the PV
array
Q Communication assembly
R 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
☐ 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
NFPA 70).
28 SB30-77-1SP-US-40-IA-xx-13
SMA Solar Technology America LLC
®
CSA C22.1.
Installation Manual
®
ANSI/