When the electric box is only a lighting electric box or small power, and the incoming line is less than 10 square, if the number of switches is greater than 20, the electric box needs to be arranged in two rows of switches at this time, and the width of the switch . When the electric box is only a lighting electric box or small power, and the incoming line is less than 10 square, if the number of switches is greater than 20, the electric box needs to be arranged in two rows of switches at this time, and the width of the switch . This section explains the measurement points of the enclosures of distribution boards, switchboards, control panels, and cubicles (which require short delivery times and improved quality) as well as the problems related to these measurements. The correct distribution board size allows circuits to handle power without overheating or overloading. It also accommodates safety devices like circuit breakers and surge protectors, which. Next, let's introduce the wiring mode, installation method and size determination of the distribution box, For your reference. Do you really need the hair dryer, microwave, and vacuum running.