關於電拖板的使用

要計算每款電器的安培總和是否超過拖板所承受的安培.安培計算方法是將walt除优特(v) 例如電器是2000w ,就除220V 等於約9A 如拖板最多可承受30A,便不能超過30A。

2015-03-23 19:59:51 補充：
拖板大多數都是13A,當然都好每個插座位只插一個插頭,儘量不要用萬能插鬚。

Domestic power supply in Hong Kong is at voltage of 220 v. Each household power socket delivers a maximum current of 13 A.

Hence, the maximum power supplied by a power socket
= 220 x 13 watts = 2860 watts
Allow 10% safety factor, the maxiimum power that can be safely drawn from each socket = 2860 x 0.9 watts = 2574 watts

Each electrical appliance should have the "wattage" marked on it. You just add up the the wattage of each appliance used. If the total wattage is less than 2574 watts, there is no overloading of the extension board.

For example, if you plug a TV set (300 w), a desktop computer (500 w), a portable ceramic heater (1000 w) into the extension board. The total power consumption = (300 + 500 + 300) w = 1100 w. It is well within the max power loading (2574 w) of the of board.