Difference between single phase and three phase line. In a single phase power supply the power is supplied through two wires called phase and neutral. in three phase power supply the power is supplied through three wires four wires if neutral wire is included the voltage of single phase supply is 240V whereas it is 440V in a three phase supply.
what is DB box in electrical
as mentioned earlier an electrical panel is also called an electrical distribution board DB box. it is an enclosed steel box that basically houses various circuit breakers and other electrical components that maintain the power supply in your home.

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