Dab tsi yog qhov ua kom zoo rau cov tsis-cov ntaub rau cov cables?

Txhua cov square kab (ib leeg ntawm xaim tooj liab) tuaj yeem tsim hluav taws xob txog 220 volts nrog qhov tam sim no ntawm 5 A, thiab lub zog ntawm 200 cov ntsiab lus yog qhov kawg. 1P Lub Rooj Sib Tham 3-4A Lub kaw lus tam sim no yuav yog qhov kub kub thaum lub sijhawm tam sim ntawd 2-1.5 zaus, yog li xaiv tsawg kawg 1.5 square 2P yuav yog 7-9A, lwm qhov saum toj, xaiv 2,5 square metres.