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A polarized plug allows connection in only one direction. This ensures that electrical components with a higher risk of user contact, such as the shell of a lamp socket, as opposed to the center pin, is connected to neutral, and thus not presenting an electrocution hazard.
Wiki User
∙ 13y ago
Wiki User
∙ 14y agoIt does not. It actually simply makes sure that the chassis or "return" circuit is grounded, reducing the possibility of shock. House current is alternating current; it is therefore not polarized.
Wiki User
∙ 12y agoIt ensures that the device connected to the plug can only be attached to outlet in one way so that the hot side is connected in the same way each time.
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What are the application of straight polarity arc welding?
AC (Alternating Current) and DC (Direct Current) is used to describe the polarity of the electric current that the welder generates and in what direction it travels. If you use the wrong polarity for a certain welding rod, your weld strength will not be very good. The general terms associated with polarity are reverse polarity and straight polarity. These are common to the welding trade. Another way to describe the two terms are electrode positive and electrode negative. Electrode positive is the same as reverse polarity. Electrode negative is the same as straight polarity. Hence the + and the - written on your welder where the cables connect to it. Any type of welding rod you buy will be labeled as to what polarity should be used for welding with it. Using the correct polarity will ensure the proper penetration and the over all look of the final bead. If you use the wrong polarity you can tell by the signs. There will be an excessive amount of spatter, you will have bad penetration, and you will have less control of your arc. Some welding machines have a switch to adjust the polarity. If your welder doesn't have one you will need to switch the welding cables around where they plug into the machine. If you want reverse polarity, you need to make sure the electrode holder is plugged into the + terminal. The easiest way to tell if you are using the wrong polarity is by the sound and the feel of the weld you are laying down. If you don't have much experience with stick welding you will have a little more trouble determining the difference. I have seen guys weld all day long with the wrong polarity. Then I would grab their welder to use for couple of minutes and I could tell right away. It all comes down to experience.
How to change polarity of current?
You might be asking the wrong question. In North America, utilities deliver 120 volts AC at 60 hertz. This means the voltage at your electrical outlet rises to positive 60 volts and then goes to negative 60 volts. The 60 hertz means this happens 60 times a second. <><><> If you mean you have an outlet with hot and ground or hot and neutral reversed, you should call an electrician. You can buy a cheap tester that will plug in to show you if you have a receptacle mis-wired this way. If the receptacle has a black and white wire connected, and the black wire is not the "hot" wire, it can be tricky to trace down the problem.
What is a twist lock?
It is a type of plug/receptacle. Once you insert the plug, you can twist the plug to lock it in the receptacle.
What does bump the cement plug mean in drilling oil and gas wells?
Essentially you're pumping down a mechanical plug that will rest on the lower plug in the float collar. Once the upper plug is seated on the lower plug, there is no longer a flow path for the fluid to go through, resulting in the pressure spike (the "bump").
Why phase fault relays are having higher settings and more plug positions while earth fault relays are having lower settings and usually only two plug positions?
phase fault relay are having higher settings because the magnitude of phase fault currents are not so much higher as earth fault currents.hence in order to prevent any damage to the system,the earth faults should vanish as quickly as possible
Polarized plug which wire is hot?
A polarized plug can only fit together in one direction. This is to prevent reverse polarity in the device you are plugging in.
If you wire a plug in reverse by mistke with the hot lead on the thick side of the polarized plug will it cause a problem?
Yes it can. The plug and socket are polarized to be sure that the hot and neutral are not reversed.
What is a polarized electrial outlet?
In the US the larger prong is Nuetral and the smaller is Live or Positive.
This is a 2 prong polarized female. However a 2 prong unpolarized male will easily plug into a 2 prong polarized female. just not the other way around.?
This is a 2 prong polarized female. However a 2 prong unpolarized male will easily plug into a 2 prong polarized female. just not the other way around.
What is the wide spade on a polarized plug called?
The wide blade is the neutral and the narrow one is the hot.
Will Changing the polarity of a vacuum cleaner's plug cause it to blow instead of suck?
No. you cant change it's polarity because electrical current that a house uses is not a + - type, it changes it's polarity 50 times per second.
What are the application of straight polarity arc welding?
AC (Alternating Current) and DC (Direct Current) is used to describe the polarity of the electric current that the welder generates and in what direction it travels. If you use the wrong polarity for a certain welding rod, your weld strength will not be very good. The general terms associated with polarity are reverse polarity and straight polarity. These are common to the welding trade. Another way to describe the two terms are electrode positive and electrode negative. Electrode positive is the same as reverse polarity. Electrode negative is the same as straight polarity. Hence the + and the - written on your welder where the cables connect to it. Any type of welding rod you buy will be labeled as to what polarity should be used for welding with it. Using the correct polarity will ensure the proper penetration and the over all look of the final bead. If you use the wrong polarity you can tell by the signs. There will be an excessive amount of spatter, you will have bad penetration, and you will have less control of your arc. Some welding machines have a switch to adjust the polarity. If your welder doesn't have one you will need to switch the welding cables around where they plug into the machine. If you want reverse polarity, you need to make sure the electrode holder is plugged into the + terminal. The easiest way to tell if you are using the wrong polarity is by the sound and the feel of the weld you are laying down. If you don't have much experience with stick welding you will have a little more trouble determining the difference. I have seen guys weld all day long with the wrong polarity. Then I would grab their welder to use for couple of minutes and I could tell right away. It all comes down to experience.
What makes an engine turn clockwise or counterclockwise?
The starter and camshaft ! If you were to custom make a camshaft and reverse the polarity of the starter. . .it could very easily run the opposite direction ! (assuming that you have a custom oil pump and swap a few spark plug wires around).
Why does your cigertte lighter on your 99 grand prix keep blowing when you plug in your cell phone charger?
Either there is a fault in the cell phone charger (try it in something else) or the wires on the cigarette lighter socket are reverse polarity. Check centre of socket is positive.
What is the risk with reversing the wiring on a two wire lamp?
None. Regular 110 volt Ac power changes polarity sixty times a second. Hooking the two wires differently won't change a thing. Some electronic equipment needs to know which side is neutral and power and will not work with the polarity reversed. These are pretty rare, though. Actually, there IS a risk with that. While A/C power does change polarity, and the lamp will work either way, reversing the lamp's wiring WOULD DEFEAT THE SAFETY PURPOSE of the lamp's polarized plug. I'm assuming you have a fairly modern lamp that came with a polarized plug on the cord, with one blade wider than the other. If you reverse the wiring, the wires in the lamp would be connected to the wrong slots in the wall socket - and there would be a higher risk of electric shock for anyone turning on the lamp, changing its bulb, touching the frame of the lampshade etc. Most modern homes have polarized outlets, where one slot (the white-wire "neutral" connection) is larger than the other. The reason for this is so a lamp or appliance manufacturer can be sure which wire in their device gets connected to which wire in your house. Inside your lamp's socket, the two separate wires in the cord are attached to two different screws. One is at the center connection on the socket, which connects to the bottom of the bulb. The other wire is attached to the outer shell of the socket, where the bulb screws in... this wire should be connected to the white ("grounded") wire in your home. To ensure this, polarization is used. This is a safety feature because sometimes a lamp wire becomes loose or the socket gets old and worn. If the wire somehow touches the exposed socket metal, you want it to be correctly plugged into the white "neutral" wire in your home, since the white wire is grounded at the fuse box. This could save you from a nasty shock. If the wires are reversed, then the "hot" wire in a lamp might be the one that would touch exposed metal and you could become the path to ground while turning on the lamp, resulting in a serious shock. A polarized plug makes sure you plug the lamp in the right way, assuming someone has wired your home correctly (with the white wire going to the silver screw on the outlets). If your lamp has an older non-polarized plug (where both blades are the same width), then the safety feature doesn't apply because you could plug it in either way. You can fix this by purchasing a polarized replacement plug for $2. at a hardware store. On a polarized plug, the larger blade is connected to the wire that has the "ribbed" insulation.
Can you use Acer laptop computer charger on a Acer monitor?
yes provided (a) the volts out is the same (b) the current is the same or a little higher (c) the plug is the same size and type (d) the polarity of the plug is the same, if the above is ok but if the plug polarity is wrong just cut it and change it around the other way.
Does all electronic equipment operate okay with reverse polarity?
If you are talking about AC (ie something you plug into the mains), then yes, because it has no polarity. But there may be safety issues, because equipment is fused on the 'live' side. If you are talking about DC, absolutely not. Semiconductors usually only conduct in one direction, so they can't be reversed. Most electronic equipment works on DC even though it is plugged into AC. The alternating current is 'rectified' into direct current, and the polarity of this will always be correct, however the AC supply is connected.
