SMA America, LLC 6 Electrical Connection
Installation Manual SB30-40-US-IA-en-33 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.
5. Insert 1 rain-tight or water-tight sleeve (
3
⁄
4
in. (19 mm)) in the enclosure opening of the
DC Disconnect and tighten from the inside using a counter nut.
6. Install 1 rigid conduit (
3
⁄
4
in. (19 mm)) in the enclosure opening.
7. Insert the AC cables of the power distribution grid into the interior of the DC Disconnect through
a rigid conduit.
4.
Damage to the DC Disconnect due to penetration of moisture
Electronic components in the inverter can be destroyed or damaged as a result of moisture
penetration.
• Only break out 1 knockout for the connection of the AC cable.
• Do not enlarge the enclosure opening.
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