Electrical Connections - Kohler 12RES Installation Manual

1.8 Electrical Connections

WARNING
Hazardous voltage. Backfeed to
the utility system.
Can cause
severe injury, or death.
If the generator set is used for
standby power, install an automatic
transfer switch to prevent inadvertent
interconnection
normal sources of supply.
Grounding electrical equipment. Hazardous voltage will
cause severe injury or death. Electrocution is possible
whenever electricity is present. Ensure you comply with all
applicable codes and standards.
generator set, transfer switch, and related equipment and
electrical circuits. Turn off the main circuit breakers of all
power sources before servicing the equipment. Never contact
electrical leads or appliances when standing in water or on wet
ground because these conditions increase the risk of
electrocution.
Electrical backfeed to the utility. Hazardous backfeed
voltage can cause severe injury or death. Install a transfer
switch in standby power installations to prevent the connection
of standby and other sources of power. Electrical backfeed
into a utility electrical system can cause severe injury or death
to utility personnel working on power lines.
Row Temp. Rating Copper (Cu) Only
1 60 C (140 F) Use No. * AWG, 60 C wire or
or
use No. * AWG, 75 C wire
75 C (167 F)
2
60 C (140 F) Use No. * AWG, 60 C wire
3 75 C (167 F) Use No. * AWG, 75 C wire
4
90 C (194 F) Use No. * AWG, 90 C wire
* The wire size for 60 C (140 F) wire is not required to be included in the marking. If included, the wire size is based on ampacities for the
wire given in Table 310-16 of the National Electrical Code , in ANSI/NFPA 70, and on 115% of the maximum current that the circuit carries
under rated conditions. The National Electrical Code
Use the larger of the following conductors: the same size conductor as that used for the temperature test or one selected using the
guidelines in the preceding footnote.
Figure 1-17 Terminal Markings for Various Temperature Ratings and Conductors
TP-6967 2/21
property damage,
of standby and
Electrically ground the
is a registered trademark of the National Fire Protection Association, Inc.
Canadian installations only. For standby service connect
the output of the generator set to a suitably rated transfer
switch in accordance with Canadian Electrical Code, Part 1.
Have a Kohler authorized distributor/dealer or a
licensed electrician make the following electrical
connections. The electrical installation must comply
with the National Electrical Code (NEC) and all
applicable local codes. Canadian installations must
comply with the Canadian Electrical Code (CEC) and
applicable local codes.
Ground the generator set according to applicable
codes. See Section 1.8.3.
For customer-supplied
temperature rating in Figure 1-17 based upon the
following criteria:
Select row 1, 2, 3, or 4 if the circuit rating is
110 amperes or less or requires #1 AWG (42.4 mm
or smaller conductors.
Select row 3 or 4 if the circuit rating is greater than
110 amperes or requires #1 AWG (42.4 mm
larger conductors.
Cu/Aluminum (Al) Combinations
Use 60 C wire, either No. * AWG Cu, or No. *
AWG Al or use 75 C wire, either No. * AWG
Cu or No. * AWG Al
Use 60 C wire, either No. * AWG Cu or No. *
AWG Al
Use 75 C wire, either No. * AWG Cu or No. *
AWG Al
Use 90 C wire, either No. * AWG Cu or No. *
AWG Al
NOTICE
wiring, select the
Al Only
Use 60 C wire, No. * AWG or
use 75 C wire, No. * AWG
Use 60 C wire, No. * AWG
Use 75 C wire, No.* AWG
Use 90 C wire, No.* AWG
Section 1 Installation
wire
2
)
2
) or
19