American Power Conversion SYMF800KH - Manual (Page 16)

Electrical Installation: Top Cable Entry
10 Symmetra MW 800 kW 3 × 400/230 V Installation - 990-1510D
Battery cable connections (top 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.