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Power cord classification and various power cord can use how much power of electrical appliances
Marked: for example: zcn-bc-750 4 * 2.5e2.5 rc20
It means: flame retardant and fire-resistant fixed sleeve compensating wire
ZC - grade C flame retardant, N - fire resistant, BC - compensation wire, 750 - voltage is 750V, 4 * 2.5e2.5 - 4 cores, nominal cross section of each core conductor is 2.5mm2, rc20 - wire fixing sleeve, specification is 20
Given the voltage of a bulb is 220 V and the power is 40 W, what is its resistance
P=U^2/R,
R = u ^ 2 / P = 220 * 220 / 40 = 1210 ohm
Voltage 220 V, resistance 189 K Ω, how much power
P=UI=U*U/R=U²/R=(220V)²/189000Ω=0.256W
The voltage of home lamp is 24 V and the power is 60 W. what is the power under 220 V and how many kilowatt hours does the meter consume? The calculation formula
Do you mean to use the 220 V power supply at home to supply the lamp tube with 24 V through the internal (start) circuit of the lamp;
Lamp specification: 24 V / 60 W;
In this way, the lamp power is 60W, the internal circuit is within 5W, and the total power is about 65W; the power consumption per hour is within 0.065 degrees
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