does it have reverse polarity protection?
1066817
You may want to contact Whistler to be safe. To the best of my knowledge it does.
1046803
Yes. It has a standard US mains plug for 120VAC, with two (polarized) tines.
1098681
If you switch the input polarity the unit will not function at all. It has a diode. The unit will not light up. It will not turn on. It will not work. DC polarity must be connected as shown on diagram. Can you tell me why you wanted to change there polarity?
1333753
It uses deans connectors which determine the polarity. Search images of deans connectors.
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
717020
No...used to measure circuit installation..grounding, reversed polarity, open neutral, ect.
253032
No, the plug is not polarized. It can plug in either way. This plug is high quality and has been working great for the last six months for me! I use it daily.
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!
1550328
No, no polarity detector. You have to change the connection to measure charge or discharge currents.
875125
Attach a multi-meter set to measure dc volts, to both wires, just like testing a battery. If the movement is off the grid, then the wires are reversed. If the meter tests correctly, then the polarity is correct.
212011
You can plug it in either way, it is not polarity sensitive. You can not go wrong with this ths night light. We use them several places in our home. We found them once when we were staying at a strange/new/different location while traveling and really liked them and have bought 4 of them fof at home use, as well as, when traveling.
934489
I'm no electrician so can't so if the polarity can be reversed by wiring. There is NO provision to allow reversing it by switch.
1188407
According to this review, it does not have a Reverse function:http://www.amazon.com/gp/customer-reviews/R2F0VDP98UKJ90/ref=cm_cr_pr_rvw_ttl?ie=UTF8&ASIN;=B001I1M95E
774846
I'm not sure what the polarity is but there is no option to reverse it on this device.
685904
I just used a 12v adapter I had lying around. I cut the end off and used a multimeter to make sure the polarity was correct and hooked it to the board. Please, do be careful about the where you put the positive and negative. I remember reading on the net that this device won't protect itself from reverse polarity on the dc voltage. Meaning, the circuit board will be ruined.
669568
Yes. The drill does have a reverse mode. The battery lasts a really long time and it is much more compact in size than others I considered
421872
It is not set up to reverse, however, it is a two wire 12v DC motor, and you could put a double pole double throw (DPDT) switch in the power feed to reverse the polarity, and thus the motor direction