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VIDEO 004 – LEARN IP CODES and ELECTRICAL INGRESS PROTECTION

Posted on October 1, 2021

To view this video, Learn IP Codes, click on the link below https://www.youtube.com/watch?v=bWJ_xZIpuN0 To view all our videos, click on the following link https://www.youtube.com/channel/UCYaJQnpO4XAp0yCgqzMkmfA Learn IP CODES and Electrical Ingress Protection. Just what is waterproof and dustproof equipment? Are there different levels of waterproofness? What does dustproof mean. What do the IP Numbers indicate and…

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VIDEO 003 – LEARN OHMS LAW TRIANGLE

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To view this video, Learn Ohms Law Triangle, click on the link below https://www.youtube.com/watch?v=Rexyl2V829g To view all our videos, click on the following link https://www.youtube.com/channel/UCYaJQnpO4XAp0yCgqzMkmfA Learn Ohms Law Triangle. How to calculate Voltage, Ohms & Resistance, Amps & Current This video will take you through, step by step, the very easy process of calculating these…

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VIDEO 002 – 35 is the MAGIC NUMBER

Posted on September 30, 2021

To view this video, 35 is the Magic Number, click on the link below https://www.youtube.com/watch?v=URBD4llLU6Y To view all our videos, click on the following link https://www.youtube.com/channel/UCYaJQnpO4XAp0yCgqzMkmfA Is there a magic number? The number 35 is certainly the Magic Number for calculating Zs and Earth Fault Loop Impedance for electrical circuits. This is an easy way…

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VIDEO 001 THE RESISTOR COLOUR CODE

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VIDEO 001 The Resistor Colour Code To view this video, The Resistor Colour Code, click on the link below https://www.youtube.com/watch?v=Rexyl2V829g To view all our videos, click on the following link https://www.youtube.com/channel/UCYaJQnpO4XAp0yCgqzMkmfA   In this video you will learn how to use The Resistor Colour Code for 3 band, 4 band and 5 band resistors. For…

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CABLE LENGTH AND FUSE SELECTION

Posted on June 7, 2021

The table above can be used as a guide to selecting a suitable fuse or breaker for a given power rating of appliance. The cable size shown is for the standard reference method C (assuming grey 70°C twin and earth) and the maximum length of the circuit is also shown. Other factors may affect your…

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SELECTING CABLE SIZE to match FUSE SIZE

Posted on June 6, 2021

Use the table above as initial guidance in your choice of cable size for the standard reference method C (assuming grey 70°C twin and earth) Other factors may affect your choice of cable size when you factor in higher ambient temperatures, different installation conditions, grouping etc.

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QUICK GUIDE TO SPURS ON SOCKETS

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Begin by deciding on the type of circuit that is already installed – RING or RADIAL Now select the correct breaker size the table will tell you … A. The minimum size CSA of cable to use B. The maximum number and arrangement of spurs for that type of circuit. C. If an FCU is…

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ELECTRICAL DISCONNECTION TIMES

Posted on March 7, 2021

We are sometimes asked why the Wiring Regulations  have disconnection times  for electrical circuits. And what is the purpose of knowing how quickly a fuse or circuit breaker should disconnect an electrical circuit during a fault.  The permitted time to disconnect from the electrical source and to make safe the circuit is very much dependent…

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What is SELV and PELV

Posted on March 1, 2021

There is sometimes a misunderstanding of just what a SELV transformer is and how a PELV transformer differs to it. So what are the differences and why does it matter to the circuit in which they are installed and most importantly, how does that impact on the safety of the users of the installation? This…

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HOW TO CALCULATE OHMS LAW

Posted on February 27, 2021

Ohm’s Law is one of the most important formulas in the electrical engineering world. It was formulated by a German Scientist, Georg Ohm, in the early 1800’s He was carrying out experiments with the new electrical cells invented by the Frenchman Voltaire. He discovered that there was a direct relationship between the voltage in a…

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