Electrical; Electrical Connections; Wire Selection - Kohler 26RCA Installation Manual

3.1 Electrical Connections

DANGER
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. Electrically ground the generator set 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.
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 an authorized dealer or a licensed electrician make the following electrical connections. The electrical installation must
comply with the National Electrical Code
must comply with the Canadian Electrical Code (CEC) and applicable local codes.
AC circuit protection. All AC circuits must include circuit breaker or fuse protection. The circuit breaker must be rated for a
maximum of 125% of the rated generator set output current. The circuit breaker must open all ungrounded connectors. The
generator set is equipped with a factory-installed circuit breaker.
3.1.1

Wire Selection

For customer-supplied wiring, select the wire temperature rating in Figure 21 based upon the following criteria:
1. Select row 1, 2, 3, or 4 if the circuit rating is 110 amperes or less or requires #1 AWG (42.4 mm
2. Select row 3 or 4 if the circuit rating is greater than 110 amperes or requires #1 AWG (42.4 mm
Row Temp. Rating Copper (Cu) Only
60°C (140°F) Use No. * AWG, 60°C wire
1 or or
75°C (167°F) Use No. * AWG, 75°C wire
2 60°C (140°F) Use No. * AWG, 60°C wire
Use No. *† AWG, 75°C wire
3 75°C (167°F)
Use No. *† AWG, 90°C wire
4 90°C (194°F)
 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
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 21 Terminal Markings for Various Temperature Ratings and Conductors
®
The National Electrical Code is a registered trademark of the National Fire Protection Association, Inc.
TP-7091 4/23
Hazardous voltage.
Will cause severe injury or death.
This equipment must be installed and serviced by qualified electrical personnel.
NOTICE
®
(NEC) class 1 wire designation and all applicable local codes. Canadian installations
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
®
, in ANSI/NFPA 70, and on 115% of the maximum current that the circuit
®
is a registered trademark of the National Fire Protection Association, Inc.
Section 3. Electrical
2
) or smaller conductors.
2
) or larger conductors.
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
31