Four-Lead Reconnection - Kohler 7.5EOR Service

10.12Four-Lead Reconnection

The following drawing illustrates the reconnection of
four-lead generator sets.
National Electrical Code (NEC) guidelines.
Voltage reconnection. Affix a notice to the generator set after
reconnecting the set to a voltage different from the voltage on
the nameplate. Order voltage reconnection decal 246242
from an authorized service distributor/dealer.
100-120 Volt Configurations
L0 (Neutral)
Ground
Load
Side
Line
Side
4 3 2 1
Figure 10-1 100-120 Volt, 3-Wire Configuration
If the installation requires a factory two-pole circuit
breaker, do not connect the load-side terminals of the
circuit breaker together; see Figure 10-1.
installation requires a 100-120 volt, 2-wire system, use a
single-pole circuit breaker. See Figure 10-2. When
connecting stator phase leads together, size the output
lead (L1) to handle the amperage. Use a jumper lead on
the line side of the circuit breaker to balance the load of
the generator set.
72 Section 10 Wiring Diagrams
In all cases, follow the
NOTICE
L0
GRD.
L1
L2
Two-Pole
Circuit
Breaker
Jumper
lead
4
Stator Leads
L0-L1
L0-L2
Figure 10-2 100-120 Volt 2-Wire Configuration
100-120/200-240 Volt Configurations
The 100-120/200-240 volt configuration does not use a
jumper lead. If the unit was originally wired for straight
100-120 volt, 3 wire, remove the jumper lead (see
Figure 10-1 for location).
breaker. Application of two single-pole circuit breakers
does not conform to NEC requirements for supplying a
200-240 volt
mechanically attached together. Leads L1 and L2 are
for different phases—never connect them together.
If the
L0 (Neutral)
Ground
Load
Side
Single-Pole
Circuit
Breaker
Line
Side
3 2 1
60 Hz 50 Hz
100-120 Volt 100-120 Volt
100-120 Volt 100-120 Volt
Select a two-pole circuit
load—even if the
L0
GRD.
L1
breakers are
TP-6073 4/06