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目前,使用的螺口灯泡,一般为E27/27和E27/35两种。这两种灯泡的金属螺纹直径都为27毫米,而金属螺纹的的高度,分别为27和35毫米,通用一种螺纹灯座。用时,灯泡虽已旋入灯口,但灯头的金属总有部分外露,如接线错误,易引起人身触电。为此,应注意: 1、火线不经开关,不接灯头中心,不论开关断、合,灯泡亮否,螺纹外露部分总有电。 2、火线不经开关,直接接在灯头中心,开关即使断开,电流仍通过灯丝到灯头,金属螺纹外露部分带电。 3、火线进开关,但不进灯头中心,而接在螺纹金属上,如合上开关,灯头金属外露部分仍有电。
At present, screw-type bulbs used are generally two types of E27 / 27 and E27 / 35. Both lamps have a metal thread diameter of 27 mm, while the metal threads are 27 and 35 mm in height, respectively. When used, although the lamp has been screwed into the lamp, but the lamp metal part of the total exposed, such as wiring errors, easy to cause personal electric shock. To this end, should be noted: 1, FireWire without the switch, do not take the lamp center, regardless of the switch off, together, the light bulb is bright, the exposed part of the thread always have electricity. 2, FireWire without the switch, directly connected to the lamp center, even if the switch is off, the current still through the filament to the lamp, the exposed part of the metal thread charged. 3, FireWire into the switch, but not into the lamp center, and then the thread metal, such as closing the switch, the lamp is still exposed metal parts.