Electrical Connections
Installation Manual for Generac PWRCell Inverter
15
Wiring Guidelines
(000642)
DANGER
Electrocution. Verify all system voltages are safe before
wiring. Disconnect all AC and DC sources of power before
touching terminals. Failure to ensure no dangerous voltages
are present on conductors and terminals before wiring
will result in death or serious injury.
(000599)
Electrocution. Turn battery disconnect OFF and
de-energize REbus before touching terminals.
Failure to do so will result in death, serious injury,
equipment and property damage.
DANGER
•
The inverter shall be installed in accordance with
NEC Article 705.
•
Proper installation techniques must be employed to
restrain service loops and to separate AC, DC and
isolated circuits.
•
All conductors must be rated for at least 420 V.
•
Always use wiring methods in accordance with
National Electrical Code (ANSI/NFPA 70) or other
applicable codes.
•
Field terminals are for copper conductors only.
•
Do not use field wiring leads smaller than 18 AWG.
•
All permanently-installed conductors within the unit
are sized in compliance with NEC Table
310.15(B)(16) (formerly Table 310.16).
•
Torque all terminals as specified in
Table 5-4. Terminal Toques
Wiring Terminal
Torque
AC terminals
13.3 to 15.9 in-lb (1.5 to 1.8 Nm)
DC terminals
12 in-lb (1.35 Nm)
Ground terminals
4 to 6 AWG: 45 in-lb (5 Nm)
8 AWG: 40 in-lb (4.5 Nm)
10 to 14 AWG: 35 in-lb (4 Nm)
STOP terminals
1.9 to 2.2 in-lb (0.22 to 0.25 Nm)
Grounding
(000643)
WARNING
Equipment damage. Never connect REbus conductors to
ground. Connecting REbus conductors to ground could
result in equipment or property damage.
Bar Wiring
•
The grounding bar provides central grounding for
up to 8 conductors.
•
Input and output circuits are isolated from the
enclosure.
•
The utility neutral conductor is not bonded to the
equipment ground terminal bar within the
enclosure.
•
The inverter shall be installed as a non-separately
derived system.
•
System grounding is critical for REbus
communications. Bond the inverter enclosure to
the equipment grounding conductor of the normal
power source power feeder. Properly bond the
following equipment to the inverter equipment
grounding terminal bar:
– PV arrays
– Generac PV Link
– Generac PWRcell Batteries
•
Torque all terminal as specified in
Table 5-5.
Grounding Bar Wiring Terminal
Spe
cifications
Wire Size (AWG)
Torque
4-6
45 in-lb (5 Nm)
8
40 in-lb (4.5 Nm)
10
30 in-lb (4 Nm)
