Product Manual

Table Of Contents

3 Installation

3.1 Installation Overview

These installation recommendations apply to typical installations. Whenever possible, these

recommendations also cover factory designed options or modifications. However, because of the many

variables in any installation, it is not possible to provide specific recommendations for every situation. If

there are any questions not answered by this manual, contact your nearest Cummins/Onan distributor or

authorized dealer for assistance.

3.1.1 Safety Considerations

The transfer switch has been carefully designed to provide safe and efficient service when properly

installed, maintained, and operated. However, the overall safety and reliability of the complete system

depends on many factors outside the control of the manufacturer. To avoid possible safety hazards, make

all mechanical and electrical connections to the transfer switch exactly as specified in this manual. All

systems external to the transfer switch must comply with all applicable codes. Make certain all required

inspections and tests have been completed and all code requirements have been satisfied before

certifying the installation is complete and ready for service.

Verify that both power source voltages match the nameplate rating prior to installation.

NOTICE

Maximum continuous loads not to exceed 80% of the overcurrent protective device (circuit

breaker and fuses) ratings employed in other than motor circuits, except for those circuits

employing circuit breakers marked as suitable for continuous operation at 100% of their ratings.

3.2 Installation - Mounting

3.2.1 Introduction

Proper storage, installation, operation, and maintenance helps to increase the life of the transfer switch.

Installation must be done only by licensed, certified electricians.

WARNING

AC power within the cabinet presents a shock hazard that can cause severe personal injury or

death. Incorrect installation, service, or parts replacement can result in severe personal injury,

death, and/or equipment damage. All corrective service procedures must be done only by

technically trained and experienced personnel.

Each RA series transfer switch is factory wired and tested. Installation of the RA transfer switch includes

the following:

• Mounting the transfer switch cabinet

• Connection of all utility, generator set, and load cables (covered in Section 3.3)

• Connection of low voltage signal circuits (covered in Section 3.3.2)

• Connection of branch circuits