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Old 08-01-2012, 08:36 PM   #1
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surge protectors - Surge Guard 34750, Prog Ind EMS-PT50C, or PI EMS HW50C ?

Have never had an electrical problem at a CG in many years of camping, but after reading numerous posts about problems on the subject on this forum, I'm inclined to take the plunge ($$$) and get one. Have read a lot of good reviews on different brands, but none were a direct comparison. So . . . . would like to hear from folks who have had experiences with different units, as to pros and cons of their respective features.

We have a 5er equipped with 50 amp circuits, so have narrowed it down to the Surge Guard 34750, the Progressive Industries EMS-PT50C, and the PI hard wired HW50C, although please feel free to suggest other models. Basically, I'm looking for why you chose the one you have, and/or why you rejected the other models. Any and all comments will be helpful in making our choice.

In the case of hard wired units, would also like to know how easy or difficult they are to install. I am pretty decent at wiring, but am not sure how or where you access the inside wiring for these units. Do you wire the units near the main outside terminal, or close to the power distribution box, or ??

Thanks in advance for your comments !
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Old 08-01-2012, 08:48 PM   #2
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I have the Progressive Industries EMS-PT30C for my unit.

I had the unfortunate experience of having a site where the neutral failed as a result my converter was unable to survive the 160V. The air conditioner did survive. Had I had this unit at the time it would have saved me from the damage.

This unit will kill the power to the RV in the event of over voltage, under voltage, open ground, reverse hot/neutral. In addition if the power is interrupted momentarily it will hold the power off for two minute and allow your air conditioner to equalize and not try to instantly restart under that much load.

The unit is not cheap but it is less than an air conditioner.
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Old 08-01-2012, 09:00 PM   #3
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The park where I am right now has power issues. My EMS-PT50C shut off my power yesterday afternoon due to a lost ground issue. This happens much too frequently for me to now have the protection I have. I think it is well worth the money and as was said above, much cheaper than a/c's.
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Old 08-01-2012, 09:12 PM   #4
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I installed the EMS-HW30C (w/remote display) into my trailer. It was not hard to install at all. Once you locate where you want it, it is a piece of cake to connect. I pulled my breaker panel out and installed it in the space behind the panel. It was was a small area to work in but with patience it went pretty easy. To connect the hardwrie is straight forward, cut the power cord, connect each end to the appropriate side of the EMS and off you go.

I have two Yamaha 2000si generators if I decide to boondock and all I have to do is switch the EMS into "by-pass" mode and it will allow everything to work. If you don't put into by-pass you get an open ground error on the EMS. But since you know where the power source....no issues.
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Old 08-01-2012, 09:40 PM   #5
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I recently installed the PI EMS-LCHW30 in my TT, this is the 30amp hardware model. I went the hardwire route to minimize the chance of theft, and one less item to deal with when setting up/breaking camp. Also, in the event that there is a product issue, I don't have to send the whole product back to the manufacture......., and I "believe" the hardwire models are easier to trouble shoot/repair in the event that one has to contact PI tech support.

Works great with my Yamaha 2400 genny as well. I don't put my EMS into by-pass mode (that way all of the protection features remain in service), I made a bonding plug for the genny.

Bonding Plug: http://www.rv.net/forum/index.cfm/fu...8.cfm#25760168

My EMS install: https://www.jaycoowners.com/showthrea...-Install/page3

Bob
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Old 08-01-2012, 09:47 PM   #6
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What sold me on the Surge Guard was the digital readout of voltage and current. I like the idea of knowing the load of each appliance (start-up and running) versus just a display that tells you there is a problem. Knowing when you're approaching the maximum load for the system, noticing a significant increase in the load while running a particular appliance could serve as an indication of a pending problem.
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Old 08-01-2012, 10:07 PM   #7
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Bob (Rustic Eagle),
Question, did you make the bonding plug just like the one in the pic in the link you attached? I run two Yamaha Ef 2000is generators connected together with the Parallel Power Cable to provide 30amps. I am gathering I would require one of these plugs for each generator?

Thanks
Tim
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Old 08-01-2012, 10:09 PM   #8
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Quote:
Originally Posted by 2edgesword View Post
What sold me on the Surge Guard was the digital readout of voltage and current. I like the idea of knowing the load of each appliance (start-up and running) versus just a display that tells you there is a problem.....snip
The digital display on the PI unit reads: Source Voltage, Amp Draw, Source Frequency, and Fault Codes.

Bob
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Old 08-01-2012, 10:22 PM   #9
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Tim,

Yes, my bonding plug was jumpered the same as the one in the RV.NET link, I used a different style plug that I had on hand......:



Good question..., I'm not sure about when using two genny's if two bonding plugs would be required, I'm sure one of our electrical members will chime in with an answer.

Bob
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Old 08-01-2012, 10:41 PM   #10
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Tim,

The following RV.NET thread talks a little about the bonding plug and using two generators:

http://www.rv.net/forum/index.cfm/fu...6.cfm#25766176

So, if I read the thread correctly you only need one bonding plug as long as the parallel cable is connected correctly between the two genney's.

Bob
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