Does polarity matter and if so, which wires are positive and negative?
1618217
I didn't install them to be honest, but I'm pretty sure there's only cable. So it doesn't matter
1618218
Yes polarity matters. I don't know which is + or - however. I tested it one way, didn't work, reversed the polarity, worked.
1618219
Yes, it matters for making it work, but no harm if you wire an LED in reverse. It stands for Light Emitting DIODE, and a Diode is an electronic component that blocks current in one direction (polarity) but passes current in the opposite. So you cannot hurt it, unless you exceed the "reverse voltage" which is usually in the several hundred volt range on most standard diodes. Not sure if an LED has these high ratings, but you should not exceed the input voltage anyway. You can't burn it out, you're Safe!
1618220
Polarity does matter, but the wire colors have changed from batch to batch (I've ordered several pairs over the past few years), making trial and error the only way to tell which is positive and which is negative. There is no harm hooking it up backwards, it just won't work until hooked up correctly. I have only had one break a wire internally (after crashing the dirtbike and breaking the mounting screw, it dangled by the wire for several miles before we noticed it.) Once home, just took it apart and re-soldered the wire to the board, replaced the broken screw, and back in business again.
1088614
I don't see any mention of "reverse polarity" in the product descriptions. Works fine in my airplanes.
1228663
The switches are not polarized. Think of them as a piece of wire that is continuous when the button is pressed. You can connect them with either terminal to either pole of your voltage source.
1026574
Not sure off top of my head. Normally I use a voltmeter to check these things. Properly designed circuits will have a blocking diode to prevent polarity reversal issues. Those that don't, may have smoke issues!
2153853
yes it's true, it has no polarity on both terminals. either ways of connections work properly.
569336
The brown wire is the positive ,+, terminal which corresponds to the red wire. The blue wire is negative, -, which corresponds to the black wire. They should be labeled on the power supply. Even if you reversed them you won't harm the led's. They just won't light up.
2132410
i believe the two black are the heater 12v no polarity. the other two are signal to the computer and polarity is necessary. good luck. peter
1630283
Sorry, but I don't remember. Mine was used with a 12v DC converter for a light strip, so polarity is a definite concern
1550328
No, no polarity detector. You have to change the connection to measure charge or discharge currents.
850178
It just has a spot for positive and negative so any wire will work with them I have wire from radio shack on mine
1849907
no they only use the standard positive and negative wires. just 2. they are awesome speakers btw.
1985274
Everything is provided (mounting bracket). When the appropriate voltage is applied to the terminals in the back it starts counting. Watch the polarity of course. I've never had one fail and we've used something like 200 of them over the years in our OEM equipment.
863302
When dealing with a solenoid, polarity isn't really a concern. You will connect one of the wires on the solenoid to the common wire in your irrigation control line and the other to your zone specific conductor. It doesn't matter which. When the zone is active this line gets energized which allows current to pass through the solenoid which powers magnet pulling the plunger up to the stop thereby opening the valve. I hope this helps!
348592
Usually you use the two outside terminals or whichever ones are marked + and -.Polarity does not seem to matter to the charger.
1333756
The polarity of the T connectors is standard -- the top bar of the T is positive and the post is negative. The labels on the diagram in the instructions are misleading since they are opposite to the orientation of the T sockets.
1947877
There is NO "positive" and "negative" in house wiring. Please do a web search on "lamp re-wiring". An improperly wired lamp can give you a bad shock (or worse) even with the switch off.
511297
Mine works fine, but remember you have to separately plug it into the appropriate pins on your motherboard, if you did that and it still does not light, reverse the leads and try that. You would think that polarity does not matter but we've found out in this case it does. Also, don't pay the current price showing here of $84, I bought mine on sale from Amazon back in January for $49 including a $10 rebate, but for instance right now at New Egg this same case is on sale for $59 with rebate