Low Voltage Temporary Electrical Installation

Introduction

BS 7909 deals specifically with setting-up and use of temporary electrical systems in the events and entertainment industry. Temporary electrical systems are typically required to be set-up hastily in challenging conditions, which in turn leads to a heightened risk of damage or other problems. BS 7909 therefore requires systems to be designed in accordance with the IET Wiring Regulations (BS 7671) so that adequate protection against the risks of electric shock, fire and interference are ensured. A properly designed system is then deployed and managed in accordance with BS 7909. The  BS 7909 certification forms are available, the forms include completion certificate, schedule of test results and confirmation of electrical completion. BS 7671 is the 18th edition and the current standard used in the UK. It came into effect from 1st January 2019 and is the national standard used for electrical installation and wiring safety across domestic, commercial, and industrial properties. BS 7671 covers circuits supplied at nominal voltages up to and including 1000V AC or 1500V DC. It also applies to Extra Low Voltage (ELV) ranges and Low Voltage (LV) ranges, across a variety of frequencies. It also includes the building regulations, competent persons scheme, permit to work and cabling. Earthing essentials with respect to electrical hazards for achieving a safe and secured electrical power system.

This Low Voltage Temporary Electrical Installation training course will highlight:

• The need to understand the importance of safety
• Operations of overcurrent protective devices
• Understand the significance of volt drop and impedance calculations
• Capable of systematic trouble shooting techniques
• Issuance of certificate as per the electrical certification software recognizing the safety, integrity and security of the electrical system

Objectives

By the end of this Low Voltage Temporary Electrical Installation training course, participants will learn to:

• Recognise roles of competent persons
• Explain characteristics and operations of fuses and circuit breakers
• Determine factors for voltage drop and earth impedances
• Understand the importance of earthing and bonding
• Review the cables and connectors

Training Methodology

This Low Voltage Temporary Electrical Installation training course will ensure that participants will receive a thorough training on the subjects covered by the course outline with the instructor utilising a variety of proven adult learning teaching and facilitation techniques. Each course participant will receive a copy of the comprehensive course notes. The presenter will outline and discuss the topics using computer displays, videos and power point presentation. The training course is designed to have an interactive format to maximize delegate participation. Questions and answers are encouraged throughout and at the daily sessions. Needs-Based case-studies and examples will be discussed in problem solving workshop sessions. This gives participants the opportunity to discuss with other delegates and the presenter their specific problems and appropriate solutions

Who Should Attend?

The engineering, operations and maintenance staff will be able to comprehend the BS 7909 and BS 7971. This will enable them to carry out the necessary tasks safely and effectively.

This Low Voltage Temporary Electrical Installation training course is suitable to a wide range of professionals but will greatly benefit:

• Electrical engineers
• Maintenance technicians
• Electrical supervisors
• Engineering professionals
• Operators of the electrical engineering department

Course Outline

Day 1: Identification of Competent and Authorized Persons

• Requirements for competent and responsible person

• Criteria and areas of responsibilities of competent electrical worker

• Requirements for handover

• Tasks identified and executed before handover

• Understanding of direct and indirect contact

• Electric shock hazards

Day 2: Methods and Impacts of Effective Earthing and Bonding

• Earthing and equipotential bonding

• Earthing methods and network designs

• Automatic disconnection of supply

• Operations of fuses and circuit breakers

• Simple and complex systems

• Standby diesel generators and utility transformers

Day 3: Appropriate Cable and Connector Selection for Designated Wiring Systems

• Connector type and use

• Illustrate the merits of various types of cable connectors

• Cable selection and use

• Common low voltage cable characteristics

• Installation Practices

• Conduit and trunking system

Day 4: Impact of Volt Drop and Earth Fault Current

• Factors associated with volt drop

• Calculating volts drop

• Earth fault loop path

• Understanding of Ze and Zs and their relevance

• Problem-solving

• Trouble shooting and common diagnostic instrument

Day 5: Arc Flash Mitigation Techniques

• Requirements for inspection and testing

• Sequence of testing and the relevant instrumentation

• Reporting and handover

• Prescribed certificate of completion and energisation

• System testing and verification

• Wrap up session with Q&A