Hello everyone. I have a question about using a standard house polarity checker with a 30 amp adapter, to check polarity at the pedestal. I am a new owner of a TT and I have been researching surge protectors. Some of the “surge protectors” look like fancy and expensive polarity checkers. I know I could ask the dealer about this, but I thought that another newbie might benefit from this question. Thanks!

Not sure exactly what your question is..

The so called expensive SURGE PROTECTOR plays a very important role in the RV trailers. It is always ON and looks for bad incoming 120VAC line voltages. When it see's something bad it disconnects your RV trailer from the source to prevent failures.Actually a small price to pay for protection like this...You can use RV adapters to get your 30A and 50A service pedestal down to a 20AMP Receptacle and plug in one of these CIRCUIT TESTERs which will detect bad wiring and possible problem areas but does not give you 24HR protection. These are really just a good tool to have around to test the 12VAC Power SOURCE before you hook-up to it. I think this is what you may be referring to...Roy Ken

Ok, let me clarify my question. I have a standard house current polarity checker. It indicates an open ground, open neutral, open hot, hot/ground reverse conditions. It has three indicator lights that will light up in a certain sequence, depending on the wiring condition of the duplex. It has a 120VAC 15amp three prong on it for use in checking wiring conditions. I can buy a 15 amp (female) to 30 amp (male) adapter for around $5, and install it on my (house hold) polarity checker. My question is, can I use this to check for proper 30 amp wiring, (open ground etc.) at the campground pedestal?Thanks!

Get a dogbone adapter (click here) like this and use RoyB's polarity tester. This will work just to be sure where every you're plugged into is wired correct.A surge protector will provide much more insurance, not just for high voltage or high voltage spikes, but also low voltage, which can reek havoc on your air conditioner! The surge protector (made for RV's) will kill the power before a spike, high, or low amps can cause any damage. The price of a replacement air-conditioner will cost a lot more than an RV surge protector, not to mention the down-time you won't be able to use your camper while, whatever got damaged, gets fixed.I have one of these:

Go to myrv.us/electric and click on outlet testing on the left side. Then scroll down and click on either 30 amp tester or 50 amp tester. Makes it simple.I made one of the 50 amp testers. And with a 50/30 adapter I can easily test 30 amp park connections or 50 amp park connections for voltage and proper wiring before I plug the RV in.

Polarity Checkers | Good Sam Community

brebar
Explorer
Apr 18, 2014
Ok, let me clarify my question.

I have a standard house current polarity checker. It indicates an open ground, open neutral, open hot, hot/ground reverse conditions. It has three indicator lights that will light up in a certain sequence, depending on the wiring condition of the duplex. It has a 120VAC 15amp three prong on it for use in checking wiring conditions.

I can buy a 15 amp (female) to 30 amp (male) adapter for around $5, and install it on my (house hold) polarity checker.

My question is, can I use this to check for proper 30 amp wiring, (open ground etc.) at the campground pedestal?

Thanks!
RoyB
Explorer II
Apr 18, 2014
The so called expensive SURGE PROTECTOR plays a very important role in the RV trailers. It is always ON and looks for bad incoming 120VAC line voltages. When it see's something bad it disconnects your RV trailer from the source to prevent failures.

Actually a small price to pay for protection like this...

You can use RV adapters to get your 30A and 50A service pedestal down to a 20AMP Receptacle and plug in one of these CIRCUIT TESTERs which will detect bad wiring and possible problem areas but does not give you 24HR protection. These are really just a good tool to have around to test the 12VAC Power SOURCE before you hook-up to it.

I think this is what you may be referring to...

Roy Ken
2oldman
Explorer II
Apr 18, 2014
Not sure exactly what your question is..

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