SMA SB 3000-US - Manual (Page 39)

SMA America, LLC 6 Electrical Connection
Installation Manual SB30-40-US-IA-en-34 39
6.3 AC Connection
6.3.1 Inserting the AC Cables into the DC Disconnect
Additional required mounting material (not included in the scope of delivery):
☐ 1 rain-tight or water-tight sleeve (
3
⁄
4
in. (19 mm)).
☐ 1 rigid conduit (
3
⁄
4
in. (19 mm)).
Cable requirements:
☐ The AC cables must be designed for ambient temperatures exceeding +194°F (+90°C).
☐ The maximum cable length, which is dependent on the conductor cross-Section, must be
adhered to.
☐ Conductor material: Copper wire
☐ Conductor cross-Section: AWG 10 to 6 AWG (6 mm
2
to 16 mm
2
)
☐ The AC cables must be designed according to the installation requirements applicable on site.
Requirement:
☐ The AC cables must be protected using a switch-disconnector or miniature circuit-breaker
(see National Electrical Code
®
, ANSI/NFPA 70). For this purpose, observe the maximum
permissible fuse protection of 30 A.
☐ All electrical installations must be carried out according to all electrical standards applicable on
site and the National Electrical Code
®
(NE, ANSI/NFPA 70).
☐ Installations in Canada must be carried out in accordance with the applicable Canadian
standards.
1. Disconnect the AC miniature circuit-breaker and ensure that it cannot be reconnected.
2. Open the DC Disconnect (see Section 9.3).
3. Break out a suitable knockout on the underside of the DC Disconnect for inserting the AC cable.
The AC outputs and the neutral conductors are not bonded to ground
The circuits of the AC input and the AC output are isolated from the enclosure. The electrically
qualified person is responsible for grounding the plant according to Section 250 of the
National Electrical Code ANSI/NFPA 70.
The Sunny Boy must be connected to the AC grounding conductor of the power distribution grid
via the ground terminal
of the AC connection terminal.