Terminal is mainly used for the electrical connection between the lines and lines of convergence with the column, there is no strict differences, only terminals are often used in contrast to facilitate distribution box inside wiring, power is usually less acceptable. In the process of applying terminals tend to attack a wide range of questions. 1, resulting in blackened doubt if the black terminals, an intervening is not necessarily capable of burning black oxide, can also be black. So how to verify it is not burned black? Approach we plug in terminal block
adopted is a rub with your fingers, if it can be erased, like soot same, and that was constituted oxidized black substance, perhaps starting a sandpaper rasp caliber worn. Experts remind you point to note here is:! Live evening hours do not rub with your fingers so the other one that is capable of burning black, in addition to fire and send Gong qigong master, as long as a able, that is, the two terminals from overheating, resulting in temperature can have two questions: resistive touch terminals loose formation is too large, then overheating; terminals are not loose, but do not know the reason for some circuits and overcurrent fever, such as power voltage is too high, perhaps short-circuited load. 1, the voltage is too high. Can be checked from the source, the transformer secondary voltage - voltage distribution box - each voltage electrical equipment.