Final Assignment: Case Study: Electrical Engineering Department

KEO International Consultant

Design Department

Showaikh

Ibrahim Ahmed Al-Atyani

208116759

Dana Hisham Shaath

210211134

Rana Mohsen Tolba

210119395

EE-399

Engineering Training

Final Report

Electrical Engineering Department

Kuwait University

Dr. Sultan Alanazi

July 10, 2014

Preface Having a training course in KEO International Consultants will give us an experience and an idea of the electrical designing in its different fields that will surely help us in our future working life as electrical engineers. In this report we will explain what we have learned so far and the experience we had during this period. We will try to explain in a simple way the steps that any project goes through to be completed by our department.

Cable sizing is the process of selecting appropriate sizes for electrical power cable conductors. Cable sizing is one of the most important decisions that must be taken wisely. The engineer must take into considerations many factors since it has a great effect on the electrical system. Cable sizes are typically described in terms of cross-sectional area.

3.1.1 The Basics of Cable Sizing.

Mainly the cable’s size is chosen based on the rating current that will be transmitted by the cable. Choosing the cable size depends on many factors such as: the cable itself, the load, and the installation method. First the cable, many different materials is used in electrical systems cables. The most common materials used in cables are copper and aluminum and each of them have different current capacity for the same size. In addition, the insulation type and the number of cores effect the current capacity. These factors’ effect can be easily obtained from the manufacture’s tables. Second the load, this is a very important factor because it determines the rating current. This leads us to determine the number of phases that might be used. The load’s location determines the cable length which takes us to an important effect “The voltage drop” which will be discussed later. Finally the method of installation, there are many ways and places to install the cables and each one of them have an effect that cannot be ignored on the current capacity of the cables.

The engineer determines the actual equipment in each room or space. He also must follow the costumer’s requests and conditions. Then, the emergency lights and signs must be placed carefully in such a way that for every place there is a clear sign towards the exit stairs (see figure1). In addition, the fire alarm system must be implemented in this stage. The engineer has to make sure that there are enough sensors in each room and place. The engineer must pay attention to each room equipment’s before placing the sensors to make sure that he is using the correct type of sensor. The fire alarm system requires some telephones in some places and the fire alarm system must be fed from the emergency DBs. Finally, the lighting protection system is placed. It is usually placed around each floor and connected to upper and lower