SMA DC Disconnect Switch For SB 3300-U - Manual (Page 14)

Wiring SMA America, Inc.
8 DC-Discon-U-11:SE4406 Installation Guide
3.0.3 DC Disconnect Requirements
NEC 690.15-18 allows the use of fuse holders as a suitable means of disconnecting PV
arrays for servicing. Additional DC disconnects external to the inverter may be required
by the local authority having jurisdiction.
WARNING: Never remove a fuse while it is under load. Electrical
arcing and damage to the fuse holder will occur if a fuse removed
under load.
3.0.4 PV String Fuses
The DC Disconnect is shipped with 15A, 600Vdc fuses in the fuse holders. (Other fuse
sizes are available from SMA America. Be sure to specify alternate fuse sizes when
ordering the DC Disconnect from you distributor.) The illustration below shows the string
fuse holders and their corresponding terminals.
Figure 1-2: String Fuse Terminal Locations
2
1
4
3
1 2 3 4
Switch Housing