Ceiling Rose Wiring
An explanation on the varying methods of wiring light fittings and ceiling roses.
RJ45 Connections
RJ45 pinout connections and wiring diagrams for cat5, cat5E and cat6 data cables.
Resistor Colour Codes
A complete guide to resistor colour codes and calculating resistor resistance values.
Solar PV Voltage Drop Calculator
DC voltage drop calculator for calculating the solar PV string DC voltage drop.
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.
Y Plan Wiring Diagram
Y Plan wiring diagram for fully pumped central heating & hot water systems.
S Plan Wiring Diagram
S Plan wiring diagram for fully pumped central heating & hot water systems.
Maximum Demand Calculator
Calculate the Maximum Demand with this new cloud software.
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.
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.