MATERIAL cost:
box price: junction box (+36,-Ft)without box cable price: 3*2.5mm² (+660,-Ft)NYM 3*1.5 mm² (+342,-Ft)4*1.5mm² (+605,-Ft)5*1.5 mm² (+620,-Ft)5*2.5 mm² (+900,-Ft) clamp price: cable clamp (+85,-Ft)