Ground Fault Circuit Interrupters : 無料・フリー素材/写真
Ground Fault Circuit Interrupters / tdowd1982
| ライセンス | クリエイティブ・コモンズ 表示-継承 2.1 |
|---|---|
| 説明 | The grounding pin in an appliance will prevent many electric shocks from wiring faults, as the low resistance between the electric wires and the ground will cause a current large enough to trip a circuit breaker. But a home circuit breaker won't trip until you get to at least 15 A, and unfortunately, a current of less than 0.1 A can be enough to kill someone.Fortunately, a device called a Ground Fault Circuit Interrupter (GFCI) exists. You see it as the "Test" and "Reset" buttons on some electrical outlets, hair dryers, and hedge-trimmers. It checks that the current in the two wires in the circuit is the same. If it isn't, that means current from one of the wires must be "leaking" through an alternate path to ground. That's probably not a good thing, as the leaking current may be through a person, so it turns off the circuit. US Building codes have progressively mandated more and more GFCIs in homes since the 1960s, with most focus on places where electrical appliances and water can come into contact.If your GFCI continuously trips, it either means it has gone bad, or that you've got a ground fault in one of the outlets it is protecting (it can protect several, as shown in this diagram. Check and make sure, and have a qualified person look at your wiring if you can't figure out the problem. You should also test your GFCI's monthly by pressing the "Test" and then "Reset" buttons. |
| 撮影日 | 2016-03-31 08:07:47 |
| 撮影者 | tdowd1982 |
| 撮影地 |