KIT-SEAL 3193557 - Caterpillar

Electric Power Generation AllGenerator Set AllIntroduction
This document offers guidance in grounding generator set packages to provide protection for operators and users. The ground provides a common reference between the generator set, the controls, and the components that are located in various locations that are on and off the package. Proper grounding is also required to meet compliance to regulations and the functionality.This document is intended for Caterpillar and dealer personnel that are involved in the design, the application, the installation, and/or the commissioning procedures of Electric Power Generation products.Proper grounding protects personnel and equipment from the following events:
Ground fault that causes a shock hazard
Lightning
Opening of the vacuum circuit breaker
Large load swings
Equipment failureRequirements in this document reflect the following information: codes, standards, relevant legislation, and experience in design.Terminology
Recommendations are indicated by the following term:
ShouldRequirements are indicated by the following terms:
Must
ShallScope
The scope of this document is for Electric Power Division products. The following products are included:
Generator Sets (open and enclosed)
Power Modules
ControlsThis document provides guidelines for grounding AC electrical generator sets and associated components. These recommendations should be followed to ensure compliance with international standards and major regional standards.The following applications may have special requirements that are not covered in this document: marine, petroleum, and locomotive.Responsibilities
Caterpillar is responsible for designing and delivering a product that conforms to this specification.The dealer is responsible for installing the generator set package to meet the applicable local requirements. Additions and/or modifications to the basic ground system for the satisfaction of local codes are the responsibility of the dealer.A qualified engineer is required for the design and the commissioning of all installations and applications of customer generator sets. Qualified engineers must be Professional Engineers (PE), Engineers of Record, or Equivalent responsible individuals.The customer is responsible for maintaining and repairing the grounding system and all equipment on the generator set package.The customer is responsible for ensuring that the quality of the earth ground is tested periodically.Site Grounding
Customer Connections
The customer is responsible for connecting the customer ground connection on the generator set to the ground plane for the facility power. The ground conductor must be sized and installed in accordance with the applicable local codes. At a minimum, this ground conductor will be the same size as the neutral to ground cable. Metallic conduit shall not be used as an equipment ground anywhere in these circuits. Periodic testing of this ground connection is highly recommended. Annual periodic testing is the minimum requirement.Shore Power Grounding
Shore power grounding shall include a separate equipment ground conductor that is sized and installed in accordance with the applicable local codes. Metallic conduit shall not be used as an equipment ground anywhere in these circuits.Local Codes
Comply with all local ordinances and with all authorities that have jurisdiction. The dealer is responsible for ensuring that there is compliance with the local codes.Switch Gear
An engineering review is required to ensure a proper grounding system.
Tie the normal distribution system grounds and emergency distribution system grounds together when you are required by local codes. Refer to the locally