Ceiling Rose Wiring
An explanation on the varying methods of wiring light fittings and ceiling roses.
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RJ45 Connections
RJ45 pinout connections and wiring diagrams for cat5, cat5E and cat6 data cables.
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Resistor Colour Codes
A complete guide to resistor colour codes and calculating resistor resistance values.
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Solar PV Voltage Drop Calculator
DC voltage drop calculator for calculating the solar PV string DC voltage drop.
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How do Economy 7 Immersion Heaters Work
How economy 7 immersion heaters work with off-peak and peak rate immersion heaters and how to control them.
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Y Plan Wiring Diagram
Y Plan wiring diagram for fully pumped central heating & hot water systems.
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S Plan Wiring Diagram
S Plan wiring diagram for fully pumped central heating & hot water systems.
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Maximum Demand Calculator
Calculate the Maximum Demand with this new cloud software.
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How to Wire a Light Switch
Light switch connections and wiring diagrams for 1 way, 2 way and intermediate light switches for UK wiring colours.
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Convert Old Zs Values to 18th Edition Zs Values
Convert Zs values from a previous version of BS 7671 to BS 7671 18th edition 230v Cmin values.
