Skirting board duct lower part 4 chambers made of PVC to SL 20x115mm. Duct lower part for the electrical installation duct system skirting board duct made of plastic in accordance with DIN EN 50085-1 as device installation duct. Lower part profile for direct wall mounting with pre-punched keyholes at a distance of 125 mm, up to 4 chambers for system separation of cables and for tool-free quick attachment of device carriers. The chamber structure of the lower part guarantees the required floor clearance of at least 10 mm when accommodating insulated cables.