The actual heating power is 2000 Watts, a total of four floors, a floor of nine houses Each floor is divided into four rooms and five rooms in a group, @ because of the corridor @, the 6-level line is used, and the switch is 63 A and 40 a respectively. The fifth floor is three live lines, and the nine rooms are divided into three groups, and the switch is 32 a,

The actual heating power is 2000 Watts, a total of four floors, a floor of nine houses Each floor is divided into four rooms and five rooms in a group, @ because of the corridor @, the 6-level line is used, and the switch is 63 A and 40 a respectively. The fifth floor is three live lines, and the nine rooms are divided into three groups, and the switch is 32 a,

1. 2000kW * 9 * 4 = 72kw, each phase current 72000w / 3 / 220V = 110A
The current of 25 square meters is about 120a, but it can't reach 120a after passing through the pipe, so the allowance should be left, and 35 square meters should be used for the main line
2. When the three-phase load is balanced, the zero line current is 0A, but most of the electric heaters are equipped with temperature control switch, which belongs to intermittent work, or when some heaters are not used, the three-phase is unbalanced. For example, if the two-phase heaters are all stopped, the zero line current will be 110A as the phase current, although the probability is very small, in case, the zero line will also use 35 square meters
3. There are 4 main lines, 35 square meters
Scheme 1: 35 square meters from the main line to the first floor, 35 square meters from the main line to the second floor. 35 square meters from the main line to the third floor, 35 square meters from the main line to the third floor (zero line) are connected from each floor. 6 square meters from the first floor to the fourth floor, 6 square meters from the second floor to the fourth floor, 6 square meters from the third floor to the fourth floor, and 6 square meters from the third floor to the fourth floor (zero line)
Scheme 1: 25 square meters from the main line to the first floor, 25 square meters from the main line to the second floor, 25 square meters from the main line to the third floor, and 25 square meters from the main line to the third floor (zero line) are connected from each floor
4. Peeling external connection must be well connected. It's better to use the sleeve for cable connection

The national development and Reform Commission, the Ministry of Commerce, the General Administration of customs, the General Administration of industry and commerce, and the General Administration of quality supervision, inspection and Quarantine jointly announced that from October 1, 2012, the import and sale of incandescent lamps for general lighting will be gradually prohibited in stages according to the power level. One energy-saving lamp consumes 11 degrees of electricity per 1000 hours, while one incandescent lamp consumes 60 degrees of electricity per 1000 hours with the same brightness How many? (2) How many times the power consumption of incandescent lamp is that of energy-saving lamp? (expressed with a fraction)

(1) (2) 60 △ 11 = 5511; a: the power consumption of the incandescent lamp is 5511 times that of the incandescent lamp

The wattage of the light bulb is a, then the power consumption per hour is at / 1000 degrees. There are six energy-saving lamps in the classroom, all of which are 25 watts. If the average power consumption is 3 hours per day, every month
How much electricity does it share (in 30 days)?

Degree = kWh
(25W / 1000W) x 6 lamps x 3 hours x 30 days = 13.5 kWh (degree)