This course will provide students an overview of power and electricity; from choosing a power supply, powering components for access control, intrusion, and video, as well as electricity components. It will also provide a thorough overview of the various sections of NFPA 70 (2014), also known as the National Electrical Code, that apply to alarm systems. The purpose of the National Electrical Code is the practical safeguarding of persons and property from hazards arising from the use of electricity. The code will not tell how to design the needed circuits, nor tell you how to install devices. It assumes workers already know this information. This course will focus on the parts of the code that specifically apply to fire alarm systems. After completing this course, students will be able to define the purpose and the intention of the NEC, identify specific definitions and terms that are fundamental to interpreting all code standards, and understand how this code is used in Fire Alarm installations.
- Using a manufacturer’s specification sheet, read and interpret the manufacturer’s specifications (voltage, permissible load, etc.).
- Using the NTS worksheet (found in the NTS Dictionary) and the manufacturer’s specifications, the student will be able to determine the minimum size power supply needed.
- Using an NTS worksheet and the manufacturer’s specifications, the student will be able to calculate the size battery needed for a system to operate for specified number of hours (4, 24, 60, 72) without primary power.
- Using the NTS worksheet and manufacturer’s specifications, the student will be able to calculate the size battery needed for a system to operate without primary power as required by NFPA and UL requirements.
- Select the proper transformer for power supply as well as install and wire the transformer.
- After determining the proper battery, list reasons for its failure for a given system.
Choosing a Power Supply
- Describe what features and environmental factors to consider when choosing a power supply for an alarm system.
- Explain the purpose of a transformer and the difference between a step-up transformer and a step-down transformer.
- Understand how to calculate the maximum normal load and alarm load for secondary power.
- Understand how to calculate the battery amp hours needed for different categories of alarm systems.
- Explain the two categories of power and what supplies the power.
- The two ways of connecting batteries to an alarm system and the characteristics of each.
System Power and Intrusion
- Determine the need for, and the proper methods for providing surge protection.
- Configure a switch and a contact.
- Address long wire runs (heavier wire vs. local power supplies)
Powering Components and Access
- Describe the primary power requirements for an Electronic Access Control (EAC) system
- Explain secondary power requirements for fail safe and non-fail-safe devices.
- Identify surge protection components that are commonly used in conjunction with an EAC system.
Power and Video
- Describe Ohm’s and Watt’s Laws as well as the relationship between Ohms, Amps, Volts, and Watts.
- List the kinds of components you will need to consider when determining the total load of a circuit.
- Elaborate on how to choose the appropriate size wire for a given distance.
- Identify the major types of power for cameras, i.e., AC, DC, and POE.
- Define Transformers and distributed power supplies and state their benefits.
- Define current, voltage and resistance and the unit of measurement and symbol used for each.
- Explain the function of a resistor and how to identify resistor ratings.
- Explain the function of a conductor and describe the different conducting materials.
- Explain the function of an insulator and describe different insulating materials.
- Describe the theory of circuits, simple series, and parallel circuit.
- Describe how to find all the values of a circuit when provided with the necessary information.
- Describe the formula for finding power using Watt’s Law and Ohm’s Law.
- Overview of NFPA 70
- Chapter 1 – 9
- Annex I – H
- Articles, Paragraphs, and Tables
What to expect in this course: The presentation includes text, audio, graphics, videos and activities to help you absorb the information presented. This course has a short quiz at the end, which you will be required to pass with a 80% or greater to complete the course.