Two prong AC plug - which is live and which is neutral
2001年5月21日 · Of particular note are certain devices or appliances that have circuitry, such as, coffee makers, alarm clocks, computers, etc. If the hot and neutral wires are reversed, damage can occur to these appliances. Do not "clip" polarized plugs to fit into a two (2) prong receptacle or a receptacle not designed for polarized plugs.
Can you throw a big UPS onto a 2-prong/non-grounded outlet?
2007年1月25日 · Many old houses don't have grounds, period. You can try that and see but you also have to have the polarity right - get one of those outlet testers (a 3-prong plug with LEDs on it to show the condition of the outlet) to be sure - under $5.00 everywhere - on sale around here for $2.00 or less some times.
Safety question about 2/3-prong power cords and gfci outlets
2003年4月7日 · Retailer near me is having a pretty good sale on 2-prong, 14 gauge outdoor extension cords. 90 feet for $10. But before I pick up a couple, I was hoping you smarty-pants might be able to help me out with some safety questions! This is my understanding of how this stuff works: 3-prong cords...
Two prong wall outlet options (electrical question)
2012年8月22日 · Because the two prong outlets aren't grounded, I'm wary of using a 2-3prong adapter and plugging in my computers. What are my options? It seems to be that I could run a 50ft extension cord to the bedroom and plug a surge protector into that, and then two computers + monitors into the surge protector (unless this would overload the circuit/wiring).
Are there any laptops that use a two pronged power cord
2016年1月5日 · In your office situation, I'd check your Ethernet connection. If the plug has a metal shield, that is often ground. Just hope that they did their job and is grounded all the way to the switch. Just don't have too many computers without a …
2 prong outlets and surge supressors - AnandTech Forums
2010年11月24日 · The 3 prong to 2 prong adapters are for use when the outlet box is metal and grounded. You can check by using a meter and measuring from one slot of the plug to the screw on the cover plate. If the box is grounded the voltage will read 110-120vac.
if i replace 2 prong outlets with 3 prong outlets in old house (but …
2010年6月23日 · replace all 2 prongs with 3prong gfci's. theres still no ground, but the person is effectively protected from shock/electricution. this sounds too simple. whats the down side? what happens with modern appliances (ie: toaster) that has …
space heater plug ... getting hot - AnandTech Forums
2009年10月16日 · 2. Condition of the outlet. If the plug feels loose in it, it is worn out and needs replacement. Likewise, if you look into it and it appears dirty back in there, it may need replacement. As a test, plug into another outlet and see if it runs much cooler. 3. This CAN be a poor connection between the wires and the plug blades inside the molded ...
3 prong grounded to 3 prong (one lead 'turned on side') adaptors?
2004年2月25日 · If the plug you are describing Looks like this , it is a 120 VAC 20 Amp plug. They make it like that so you do not plug a 20Amp appliance into a 15 Amp outlet. If you look at the 20 Amp receptical, you will notice that you can plug a 'normal' 15 Amp plug into it as well as a 20 Amp (with the single sideways plug) plug.
power supply for 2 prong outlet? - AnandTech Forums
2013年9月5日 · Note the circular brass contact on this three prong to two prong adapter. If the building uses steel conduit or three wire Romex (with the ground wire connected), and the wall box containing the plug is steel, you can run the screw holding the wall plate cover through the loop to ground the third lug.