• 5 years ago
How to wire 4 way light switch and intermediate switch, in this video we explain how four way intermediate switching works to connect a light fitting which is controlled with three or more light switches. We look at the EU colour coding wires and explain the different ways to connect the lighting circuit.

‍ Cheap Switches
USA: ➡️ http://engineers.news/Cheap-4-way-switch
UK: ➡️ http://engineers.news/Cheap-intermediate-switch

USA: ➡️ http://engineers.news/Cheap-3-Way-Switch
UK: ➡️ http://engineers.news/Cheap-2-Way-Switch

Cable you need for this ‍
USA: ➡️ http://engineers.news/Best-3-way-lighting-cable
UK: ➡️ http://engineers.news/Best-2-Way-Lighting-Cable


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Links - MUST WATCH!!
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⚡ELECTRICAL ENGINEERING⚡
How electricity works: https://youtu.be/mc979OhitAg
Three Phase Electricity: https://youtu.be/4oRT7PoXSS0
How Inverters work: https://youtu.be/ln9VZIL8rVs
How TRANSFORMER works: https://youtu.be/UchitHGF4n8
How 3 Phase electricity works: https://youtu.be/4oRT7PoXSS0
How Induction motor works: https://youtu.be/N7TZ4gm3aUg
What is a KWH: https://youtu.be/SMPhh8gT_1E
How induction motor works: https://youtu.be/N7TZ4gm3aUg

❄️ CHILLER ENGINEERING ❄️
Chiller Efficiency improvements: https://youtu.be/8x3MiO5XjhY
Chilled water schematics: https://youtu.be/ak51DHAiuWo
Chiller crash course: https://youtu.be/K0xAKzdROEg
Chiller types: https://youtu.be/gYcNDT1d30k
Chillers/AHU/RTU: https://youtu.be/UmWWZdJR1hQ
Water cooled chiller Part1: https://youtu.be/0rzQhSXVq60
Water cooled chiller Part2: https://youtu.be/3ZpE3vCjNqM
Water cooled chiller advanced: https://youtu.be/QlKSGDgqGF0
Air cooled chiller: https://youtu.be/0R84hLprO5s
Absorption Chiller : https://youtu.be/Ic5a9E2ykjo
Chiller/Cooling tower/AHU: https://youtu.be/1cvFlBLo4u0
Chiller flow rate: https://youtu.be/tA1_V6-dThM
Chiller fault troubleshooting: https://youtu.be/Zu0LVVNNVSw
Chiller COP calculation: https://youtu.be/h5ILlZ8nyHE
Chiller cooling capacity calcs: https://youtu.be/BZxXIdxVKeY
Chiller compressors: https://youtu.be/7Bah__spkTY
Chiller expansion valve: https://youtu.be/dXiV5YzTZQ4
Chiller surge: https://youtu.be/DQK_-vxObiw
Chiller condenser: https://youtu.be/p5uuPsyqnwU
Chiller evaporator: https://youtu.be/W3w7FpX9j9k
Chiller compressor centrifugal: https://youtu.be/PT0UIqAGacg
Chiller cooling capacity: https://youtu.be/f-N4isgQRGQ

️ HVAC ENGINEERING ️
HVAC Basics: h

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