© 2017 Sensata Technologies
22
Installation
or circuit-breakers, and must
be properly sized and rated for the
wire they are protecting and the appliances being powered.
Most
inverter’s that are hardwired use a service/distribution panel wired to
the inverter’s input (main panel), and a dedicated panel between the
inverter’s output wiring and the AC loads (sub-panel). These systems
use the circuit breakers provided in the panels as the overcurrent
protection and the AC disconnect. If fuses are used, then separate
AC disconnect switches will be needed.
Based on information from the NEC, Table 2-2 provides the minimum
AC wire size and the suggested breaker size based on inverter model.
H
owever, a larger wire size may be required because of voltage drop.
The
AC wire sizes provided in this table assume using only copper
wire and a temperature rating of 75°C (167°F) or higher.
2.4.3 Ground-Fault Circuit Interruption (GFCI) Breakers
In compliance with UL standards, Sensata has tested some GFCIs to
ensure they function properly when connected to the inverter’s AC
output.
See WARNING below.
WARNING
: Risk of electric shock. Use only the following
GFCIs [receptacles or circuit breaker(s)]: Leviton 8899-
A, N7899, and the GFNT1 and GNNT2. Other types may
fail to operate properly when connected to this inverter.
CAUTION:
GFCIs shall be installed in the recreational
vehicle’s wiring system to protect all branch circuits.
Inverter
Model
AC Input
AC Output
Input
Breaker
Minimum
Wire
Size
Suggested
Breaker
Size
Output
Breaker
Minimum
Wire
Size
Suggested
Breaker
Size
MMS1012
20
amps
#12
AWG
(3.3 mm²)
20
amps
15
amps
#14
AWG
(2.1 mm²)
15
amps
MMS1012
-G
20
amps
#12
AWG
(3.3 mm²)
20
amps
15
amps
#14
AWG
(2.1 mm²)
15
amps
Table 2-2, Minimum Wire Size to Circuit-breaker Size
Wire Color (label)
Wire Connection
AC IN
Black (HOT IN)
Hot In
White (NEU IN)
Neutral In
AC OUT
Red (HOT OUT)
Hot Out
White with black
stripe (NEU OUT)
Neutral Out
AC Ground
Green (GROUND)
AC IN & AC OUT Ground
Table 2-3, Wire Color to AC Wire Connection
