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Electrical Connections
GENERAL
The generator set electrical system installation includes .
connecting the load, installing the control wiring, and
connecting the batteries. The batteries should be con-
nected last to avoid accidental starting of the unit during
installation.
Most local regulations require wiring connections be-
rnade by a licensed electrician and the installation must
be inspected and approved before operation. All con-
nections, wire sizes, etc. must conform to the require-
ments of all electrical codes in effect at the installation
site.
AWARNING
Improper wiring can result in fire and
severe personal injury or death.
TRANSFER SWITCH
If the installation is for standby service, a transfer switch
is required for switching the load from the normal power
source to the generator set (see Figure 10). Either a
manual or automatic transfer switch may be used. Fol-
low the installation instructions provided with the
transfer switch when connecting the load and control
wiring. Onan supplied transfer switches match the
generator rating.
A C W I R I N G
Generator Voltage Connections
The generator output voltages and maximum current
rating is specified on the generator nameplate. Line-to-
neutral voltage is always the lower voltage shown onthe
nameplate and line-to-line voltage is the higher rating.
Generators can be divided into two groups, reconnecti-
ble and non-reconnectible. The reconnectible type
generator can be wired to give one of several possible
voltages. Non-reconnectible type generators produce
only one specific voltage and cannot be wired to give a
different voltage without extensive modifications. The
following sections explain the connection procedure for
each voltage code.
Non-Reconnectible Generators (Voltage Codes 6D,
7R, and 9X): These generators are wired at the factory
for a specific voltage and are not intended for reconnec-
tion. The voltage and corresponding current rating
(amperes) are shown on the nameplate.
Reconnectible Generators (Voltage Codes 15 and
515): Generators with codes 15 (for 60 Hertz) and 515
(for 50 Hertz) are three phase generators that can be
reconnected for any of the voltages shown in Figure 11.
Refer to the set nameplate for the corresponding current
rating (amperes).
LOAD
NORMAL
SOURCE
GENSET
FIGURE 10. LOAD TRANSFER SWITCH
(TYPICAL FUNCTION)
Load Connections
The 12 lead generators with load connection wires ARE
NOT connected together in the output box when
shipped from the factory. These 12 wires are labeled T1
through T12 and must be brought together before mak-
ing load connections. Proceed as follows:
1. Remove the right or left panel from output box. .
2. Bolt the load wires to the appropriate generator lead
wires in the output box according to Figure 11 for
required voltage.
3. Insulate the connections.
11
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