American Power Conversion SYMF800KH - Manual (Page 21)

Electrical Installation: Bottom Cable Entry
Symmetra MW 800 kW 3 × 400/230 V Installation - 990-1510D 15
Battery cable connection (bottom cable entry)
WARNING!
Make sure that the battery breakers are open (OFF) prior to running the cables.
CAUTION!
Refer to the battery manufacturer’s installation manual.
CAUTION!
The minimum DC voltage rating of the battery supply over-current protective device is
500 V.
Note
Over-current protection for the battery circuit is required by national wiring rules.