Wiring Guidelines; Grounding Bar Wiring - Generac Power Systems XVT076A03 Installation And Owner's Manual

Electrical Connections

Wiring Guidelines

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.
DANGER
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.
•
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 field installed conductors within the unit are to
be sized in compliance with NEC Article 310.
•
Torque all terminals as specified in
Table 5-4. Terminal Torques
Wiring Terminal
AC terminals 13.3 to 15.9 in-lb (1.5 to 1.8 Nm)
DC terminals
Ground terminals
STOP terminals 1.9 to 2.2 in-lb (0.22 to 0.25 Nm)
16
(000642)
(000599)
Table 5-4.
Torque
12 in-lb (1.35 Nm)
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)

Grounding Bar Wiring

CAUTION
Equipment damage. Never connect REbus conductors
to ground. Connecting REbus conductors to ground
could result in equipment or property damage.
•
Bond the inverter enclosure to the equipment
grounding conductor of the normal power source
power feeder.
•
The grounding bar provides central grounding for
up to 8 conductors.
•
AC output circuits are isolated from the enclosure.
•
AC system grounding, when required by Canadian
Electrical Code, Part I, is to be done in the
installation.
•
The neutral conductor is not bonded to the
equipment ground
enclosure.
•
The inverter and its connected PV and battery
sources are not separately derived systems.
•
DC system grounding is critical for REbus
communications. Ensure the following REbus
devices have a low resistance wired connection
back to the inverter grounding terminal bar:
– PV Link
– PWRcell Batteries
•
Torque all terminals as specified in
Table 5-5. Grounding Bar Wiring Terminal
Specifications
Wire Size (AWG)
4 – 6
8
10
Installation and Owner's Manual for Generac PWRCell Inverter
(000607a)
terminal bar within
Table 5-5.
Torque
45 in-lb (5 Nm)
40 in-lb (4.5 Nm)
30 in-lb (4 Nm)
the