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What is reverse polarity - Heating & Cooling

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Its when you reverse the + positive with the - negative with line voltage its when you switch the hot lead with the neutral lead

Posted on Nov 22, 2013

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What is the main function of a reverse polarity diode, what would happen if it was blown


Hi,
a diode in reverse polarity could be used e.g. for protecting some circuit against improper polarity of supply. It could be connected in serial - but it is in forward polarity - (disadvantage: voltage drop) or in parallel - reverse polarity - with a fuse in serial to supply. This way is often used with Zener diode - protection against overvoltage in addition. Try to google e.g. "how to protect against improper polarity". For this type of protection could be used special types od diodes - transils - they could be one- or bidirectional. In case of a diode failure, the supplied circuit may not work - it depends on the way of diode connection and type of its failure - short circuit or disconnection. But there is many diode application: try https://en.wikipedia.org/wiki/Diode https://en.wikipedia.org/wiki/Diode#Applications
Jiri

Apr 24, 2017 | Radio Communications

1 Answer

Only runs in reverse, why?


Polar Express only runs in reverse ' O Gauge Railroading ...

ogrforum.ogaugerr.com/topic/polar-express-only-runs-in-reverse
Dec 7, 2011 - Polar Express only runs in reverse ... At this time of the year all Polar Express trains are programmed to run North only. ... This would not be so bad on the Strasburg set because half the time, the prototype runs in reverse.

both trains only go backward - Classic Toy Trains Magazine

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... trains that i set up around Christmas. The first train, according to the box, is a k-line 0/027 gauge dual motor mp-15. For a long time it has only run backwards.

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Jan 01, 2016 | Crafts & Hobbies

1 Answer

What is reverse polarity


Reverse polarity light tells if the the hot wire is reverse with the neutral wire. My guess is your "home" cable wiring is incorrect.

Mar 12, 2014 | Heating & Cooling

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What is reverse polarity


Reverse polarity means in a dc voltage scenario (boat camper anything 12 volt Dc) thatvthe positive ( red) and the negative ( black ) have been switched or reversed.In a 120 volt ac scenario (house ,garage , outlet etc.) It means the hot
( black ) and the neutral ( white) are reversed.
hope this helps.

Dec 04, 2013 | Heating & Cooling

1 Answer

Honda eu10i reverses polarity on boat


Polarity lights in AC means that it thinks the wrong input lead is earthed ie neutral.

If polarity detector is showing that there is no neutral earth bond it may not be a bug but a feature, as standard the EU10i would not have an earth neutral bond.

Otherwise I can not see why your detector thinks there is a polarity reversal.

Kevin H

Jan 24, 2013 | Honda Eu-1000i Inverter Generator

1 Answer

I installed replacement batteries with the polarity reversed. Since then unit does not display the Contact file, but all other functions (activities, data files, etc.) seem unimpaired. Any ideas? I...


Hi, well the reason this has happened is that these contacts are stored in battery backed up NVRAM, now this RAM is very sensitive to polarity reversal, and also due to the way it works, doesn't have polarity reversal protection, on that circuit. So when you reversed those batteries even though the reverse polarity protection saved the Unit as a whole, the NVRAM would have been destroyed or wiped at best. These is no real way of replacing this NVRAM, I guess you could send it back to the factory though and ask for a "Quote" with view to the repair.

Sep 14, 2010 | Sharp Zaurus ZR-5700

1 Answer

The invesion polarity of the power supply coul'd be broken the mainboard?


Reverse polarity of the power supply to a laptop will damage the motherboard if there is no reverse polarity protection built-in to the motherboard circuitry.

Jul 12, 2009 | Computers & Internet

1 Answer

On the jensen vm9022 how do you reverse the subwoofer polarity


CLICK HERE for a copy of your manual in PDF format.

Phase control is featured on page 17 (21 of pdf)

In the Audio Sub-Menu:
Subwoofer Phase Adjustment: Touch the sub.w icon to
access the subwoofer polarity controls and reverse the
subwoofer signal polarity from to 180°. Reversing
polarity can improve bass response related to speaker
configuration.

Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.

Apr 06, 2009 | Jensen Car Audio & Video

2 Answers

Reversed polarity on 2000 mazda millenuim, now my car wont start


if you are lucky, only the fusible link(in the fusebox in the engine bay) is blown. if you are not lucky, a whole lot of modules are blown, and this is really expensive.

Mar 22, 2009 | 2000 Mazda Millenia

1 Answer

Cb radio reverse polarity damage


The diode is there to protect against rev polarity. Simply replace it with soomething like a 1n4007.

Geno

Mar 10, 2008 | Audio Players & Recorders

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