How many coarse aluminum threads does a 4 kW single-phase motor require?
Specification of cable selection 1. is determined using the specifications of wire and cable (conductors), should consider fever, voltage loss, economic current density, mechanical strength and other conditions. According to the experience of low-voltage power line due to the load current is large, so generally according to the heat conditions section, and then check the voltage loss and mechanical strength; 2. low-voltage lighting line because of its high requirements of voltage level, can according to the allowable voltage loss section, then checking the heating conditions and Mechanical strength; 3. on high voltage lines, first according to economic current density section, and then check the heating conditions and the allowable voltage loss; 4. high-voltage overhead line, its mechanical strength is also fulfilled. If the user does not have experience, you should consult the relevant professional units or people.
Selection of cable type cable selection, to consider the use, installation conditions and safety; according to different purposes, can choose the power cables, overhead insulated cables, control cables; according to different laying conditions, can choose general plastic insulated cables, steel armored cable, steel wire armored cable, anti-corrosion cable; according to the safety requirements, can choose the flame retardant cable, halogen-free flame retardant cables, fire resistant cables.
Current calculation of 4 kW single phase motor:Current power / voltage = 4000 / 220=18A. Recommended to choose the aluminum core wire 6 square, 6 square feet of aluminum core wire wire laying safety cut-off flow 39A
