BS 7671: 18th Edition Wiring Regulations – Study when you want and pass your exam when you're ready…
With the electrical installation industry in the UK growing by the day, there is an ever-increasing need for skilled tradespeople in this sector. This lack of qualified electricians has become a major concern for many businesses across the country. There are several factors that have contributed this current shortage of skilled tradespeople in the electrical … Read more
Every year, hundreds of people are injured or killed due to electrical accidents. In many cases, these accidents could have been prevented if the person had received proper training. That’s why electrical installation training is so important. By learning how to install and maintain electrical systems safely, you can help prevent accidents before they happen. … Read more
RCD description An RCD ‘Residual Current Device’ is an electrical device that monitors the current flowing through either an individual circuit such as an RCBO ‘residual current operated circuit-breaker with integral overcurrent protection’ or multiple circuits within an installation using an RCCB ‘residual current operated circuit breaker without integral overcurrent protection’. Its purpose is to … Read more
Domestic Circuits… There are two types of circuits used within all electrical installations including domestic and they are… Radial Circuits These are individual circuits which start at the consumer unit, fed via their own protective device and loop in and out as a chain until they reach their end point. The most common examples of … Read more
BS7671:2018+A2:2022 Let’s take a quick run through the new 18th Edition Wiring Regulations book, which includes Amendment 2 that was introduced in March 2022, BS7671:2018+A2:2022. We’ll go into more detail and get you ready to pass your 18th Edition exam when we go through the book together fully in your 18th Edition online course at … Read more
Let’s take a look at what are possibly the three most used calculations within the 18th Edition Wiring Regulations for electrical installations. Calculation Voltage Drop Calculating the cross-sectional area of protective conductors Tabulated current carrying capacity of conductors ‘It’ 1. Calculating voltage drop… You won’t find this formula anywhere in BS7671:2018 as this is another … Read more
One of the main reasons for using an alternating current a.c. supply is that we can easily change the voltage levels up or down by using a transformer which would be more difficult and expensive to do if using direct current d.c For efficient transmission the generated a.c. supply coming from the power stations is … Read more
05: Cable Size and Protective Device Selection The cable most commonly used in domestic electrical installations is the 70 °C thermoplastic PVC insulated and sheathed flat cable which is often referred to as ‘Twin and Earth’ or ‘T&E’ and is available in various sizes ranging from 1.0 mm² up to 16 mm². As well as … Read more
01: Ohm’s Law Ohm’s law is one of the most important theories and a corner stone principle of the electrical industry. We are going to have a look at what Ohm’s law is and how it applies to the electrical world. Firstly, let’s look at the 3 key components that form an electrical circuit. They … Read more
To become an approved domestic electrical installer who can self-certify their own work you will need to be a member of a Competent Person’s Scheme. Published in 2020 and in effect from September 2021 the IET Electrotechnical Assessment Specification sets out the minimum requirements to be met by an electrician and or company in order … Read more