Reversed polarity in ac wiring is when the hot and neutral are reversed.
the hot and neutral are wired forwards the ground and neutral are wired backwards
I am getting ready to take a inspectors test. and one of the things we have to do is look up some of the questions online did you get the answer to this one?
I know the answer, but I'm not taking this test, you are! Study your book and learn the answer yourself. Believe me, I'm doing you a favor.
For safety sake, please do not attempt the above for real. Please don't cross wires. For connections, live should go to live; neutral to neutral; and ground to ground. No exception. The hot wire carries the AC signal, which reverses polarity every 1/120 of a second. Please refer to the related links. ==============================
no, backwards walkovers are easiest however some people may learn a back handspring first therefor for them the back handspring would be easier...... isn't a back handspring just a flick??
Voltage on ground can mean an open ground. It can also mean (high) current on ground, due to a ground fault such as reversed neutral and ground.
If you are talking about an AC (alternating current) circuit, such as the house mains supply, "reverse polarity" usually means the "hot" and "neutral" wires from the supply have been connected to something the opposite way round to what they should be. If you are talking about a DC (direct current) circuit supplied by a battery, such as in a car, "reverse polarity" usually means the positive and negative leads from the battery have been connected to something the opposite way round to what they should be.
Because if you reversed the polarity at the battery it would blow the fuse through which current flows to the drain.
no, you ground the neutral
There is an open circuit on neutral. You should have power between hot and neutral, as well as between hot and ground. Note well, however, that you should not pull any power between hot and ground, because ground is not intended to be a current carrying conductor - it is only there as a protective earth ground in the case of fault. You can not easily tell, at the outlet, if neutral and ground is reversed - you need to pull a load and then double check with a clamp on ammeter at the distribution panel.
The danger of a 120V socket with reversed polarity is that some appliances are designed to minimized the chance of a user coming into contact with the hot terminal of the line. This is done by polarizing the plug, making one blade wider than the other, the narrow blade being hot. In a lamp fixture, for instance, the hot side would connect to the center pin, while the neutral side would connect to the shell. The user reaching in to unscrew or screw in the bulb might touch the shell, but if that is neutral and not hot, the risk is minimized.Another example of reversed polarity is reversed neutral and ground, which is dangerous because the ground conductor is not insulated and is therefore not rated to carry operating current.Even more dangerous, is reversed hot and ground, which would electrify the frame of an appliance, creating an electrocution hazard.Any electrician making one of these types of wiring errors should go to jail, and at minimum, should lose their license. Any non-electrician making one of these types of wiring errors may have to learn to hard way, such as by killing someone, that things electrical are best left to licensed electricians. By the way, in most US jurisdictions, if a wiring error causes a fire, the fire marshal will report that to the insurance company and the insurance company will revoke the fire insurance on the dwelling - that should make anyone stop and think about what they are doing.