Intermediate switch, is the labelling of L1 & L2 not consistent? The leaflet that came with the intermediate switch uses L1 & L2 for what www.lightwiring.co.uk calls L1 & L1 ? Physically
APNT-158 - Standard 3-Way Lighting Circuit with Intermediate Switch (w – Vesternet
Intermediate Switch Lighting Circuits (EU/UK) - The Engineering Mindset
Three way light switching | Intermediate switch - YouTube
Intermediate time switches | Voltimum UK
Electrical & Mechanical Info - Wiring connection using two way switches And intermediate switch | Facebook
Intermediate switch | Light fitting
Wiring intermediate switch | DIYnot Forums
Intermediate Switch Lighting Circuits (EU/UK) - The Engineering Mindset