12/19/2023 0 Comments Lamp cord polarity![]() ![]() The images here are my original works Tell me if this was educating. Just connect the earth wire (usually yellow or greenish) to the last terminal and that's all. The narrow blade is the power (Black wire.) If your cord is like a heavy duty lamp cord, flat rectangular shape with a grove running the full length between the. Still be happy as there is still no polarity. ![]() If you do not have red or black wire colors, brown is also live and if still no black, blue is also neutral.īut what do you do when you have the newer technology of lamp holders with three terminals. I guess you now know which are the live and neutral wires. Now connect the live and neutral wires to any of the two terminals as choice. So, you now know what polarity is and its importance in simple connections. When the connection gets too serious, make sure you call a technician. Also know that I am only just referring to little repairs here. Electricity isn’t something one should play with or do trial and error with. With that done, you can now go close to wires!Īgain, if you get confused at any point, look at the pictures here again and reread this post. Take note!īefore you start your connection, switch of the mains to your house. ![]() You should connect the red wire to L (meaning live), the black wire to N (meaning neutral) and the yellow wire is the Earth. You may have an idea of what changing the pathway of electricity or interchanging electric pathways may cause. Polarity as it relates to electricity simply means the direction or pathway of an electric field. Red- live, black- neutral, yellow- earth. ![]() Lamp-holders look like this! Let me tell you a little of what polarity means… You see a lamp holder every day, but do you stop to know how it is connected? Do you know that while connecting a lamp holder you do not need to worry about polarity? If the boat had been in the water I would have probably really gotten wacked.Hi everyone! Here's my second post on 'Engineering photography' Now I check it anytime I am in a new place. I moved the cord to another outlet and the light went out. I check with another guy who had his boat plugged into the same outlet and his reverse polarity light was also lit. I chase the extension cord (with its orginal factory ends) back the old building where I pluged into a outlet and figure that the outlet was wired backwards. I crawl out from under the boat and go down into the cabin to check the reverse polarity light and sure enough it is lit up. At first I say to myself WTF? and then of course I touch it again thinking I was dreaming or somthing and sure enough I get wacked again. I have one hand on the ground and when I touch the propshaft with the other hand I get the very distinctive shock of AC power. I am under the boat laying on the damp gravel/sand ground and I go to reinstall one of the propellors. I never noticed the reverse polarity light was lit up on the panel. I ran a extension cord same as you to power up the boat while it was still on the hard and I was working on it. Two years ago I stored my boat is a very old yard with crap wiring. The circuit breaker in your house should blow when you turn on enough gear to get well above 15 amps, but things may be a little squirrelly if you're right around the limit. So if you hooked up your 30 amp boat to a normal 15 amp wall outlet with a 15 amp cord. In good condition, modern equipment the risk is pretty low but any wiring fault could have been very dangerous.Īs to low amperage causing the problem, anytime you draw more amperage than the wire or circuit is rated for you can get weird results. While you were using all that gear in you boat with reverse polarity, you were under a much greater chance of getting a shock, or starting a fire. The good new is that reverse polarity usually doesn't damge anything. Sometimes floating grounds can cause enough stray current to light the lamp. There is a right and a wrong way to connect these two wires, even though the lamp will light up either way. If you look closely at the cord, one half has slight ridges on the cord insulation, while the other half is smooth. It is also possible that you have a poor ground. Most lamp cords have only two wiresa hot wire and a neutral wire. If the lamp is lit then you probably swapped neutral and hot. Normal polarity means there is no voltage difference between neutral and ground so the lamp never lights. Reverse polarity is detected using a lamp between neutral and ground. ![]()
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