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Old 04-29-2012, 09:56 AM   #1
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EMS Hardwire Install

I've been putting it off for a couple of years, but I finally broke down and purchased a Progressive Industries EMS (Electrical Management System), simply put "a surge protector".

The manufacture is Progressive Industries, and the model number is EMS-LCHW30. This is a hardwired in-line model with an integrated digital scrolling display, but there is another model that has a remote digital scrolling display (EMS-HW30C).

Some of the features of the EMS-LCHW30 are:

* Surge Protection
* High/Low Voltage Protection
* Polarity Protection
* A/C Compressor Time Delay
* Open Neutral/Open Ground Protection
* Display reads: Source Voltage, Amp Draw, Source Frequency, and Fault Codes
* The EMS box can be mounted horizontally or vertically, plus for viewing the digital display it has four plug-in positions to accommodate the EMS box mounting preference.

Manufacturer's Product Information: http://www.progressiveindustries.net/ems_lchw30.htm

I purchased my unit from: http://tweetys.com/electrical-manage...re-30-AMP.aspx They have been a great source for RV accessories, and will price match (which they did on my EMS purchase).

The installation:

Locating a place to install this particular unit will very depending on one's floor plan and 30amp wiring location. In my case the location I chose was ideal and provided a means for easy access and viewing of the display.

My water/cable/electrical connections are located at the street-side rear corner of my TT, and can be accessed inside the TT by sliding a panel out of the way:



What made the location ideal was that it also housed the junction box for the 30amp shore cable, so in theory all I had to do was replace the junction box with the EMS unit.



The installation instructions supplied were easy to follow, and considering I'm more comfortable with a 1/2" drive ratchet in my hand says a lot!



Mounting the EMS to the side of my 30amp power cord storage box provided a better view of the digital display, and kept it clear of the carpet in the event it got wet. I wasn't sure if the EMS box would get warm during operation, so I used some spacers with the four mounting screws thus creating a 1/4" air gap between the EMS box and the mounting surface. It's not seen in the photo, but I do have the 30amp shore cord clamped to the floor so it can't be accidentally pulled at/or around the EMS box.



The EMS unit has a built in time delay for the A/C compressor in the event of a source power or EMS interruption. The unit comes with two different time delays, 15 seconds and 136 seconds. The default is 15 seconds, and 136 seconds (use if existing A/C doesn't have it's own built in time delay) which can be enabled by removing the supplied circuit board jumper. I have yet to determine if my Coleman Mach A/C has it's own time delay...., and with the help of JOF member "Quahog" we hope to confirm this ASAP.

Once I plugged my shore power back up, the EMS unit takes a few seconds to check the source power, then the power is released to the TT electrical system.

One mod always seems to lead to another, so I'm considering installing a Marinco detachable power conversion kit http://tweetys.com/detachable-power-...sion-kits.aspx. Another option would be to make my own by purchasing a male 30 amp plug and a female outlet. Cut off the RV cord coming from the EMS unit leaving 2 feet hanging outside the TT and attach the male plug at the end. Then attach the female plug onto the remaining 30 amp shore power cord.

It will be interesting to see what type of fault codes the EMS unit displays as I venture into different CG's.

Bob
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Old 04-29-2012, 11:14 AM   #2
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I'm glad you mounted the box on the cabinet instead of the floor like the junction box.

It made me nervous just looking at water lines sitting next to electrical connections. What were they thinking? Even a minor water leak could spell disaster.
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Old 04-29-2012, 11:48 AM   #3
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Nice upgrade, Bob.
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Old 04-29-2012, 02:34 PM   #4
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Nice job! I love my ems and feel much more comfortable at questionable pedestals. Nice thing is you don't have to check it before you plug in....you just plug in and let the system decide for you. I have actually run into a low voltage situation two or three times where it shut me down - and glad it did.
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Old 04-29-2012, 06:15 PM   #5
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Nice installation Bob!
In the photo which shows the insides of the EMS, the blue disk items which are slightly larger than a quarter, are the surge protection. The square black device where you attached the shore power cord, is a solid state relay which does the disconnect and connect as called for by the EMS microprocessor.
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Old 04-29-2012, 06:41 PM   #6
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I just ordered this past week the Progressive Industries EMS-PT50C. I would rather have the portable, but it is the same unit as described above, but 50 amp.

I am hosting this summer at the same state park where I was last summer and I'm seeing too much wiring being done by people that shouldn't be doing wiring. I will feel much better when it shows up and I can plug it in.

I got it from CW. It was a special drop ship from the manufacturer with free shipping.
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Old 04-29-2012, 06:44 PM   #7
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Quote:
Originally Posted by edatlanta View Post
I just ordered this past week the Progressive Industries EMS-PT50C. I would rather have the portable, but it is the same unit as described above, but 50 amp....
Why do you prefer portable over hard wired?
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Old 04-29-2012, 09:27 PM   #8
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Looks great Bob, I want to do the same. I also want to do the power cord detach upgrade.
I noticed there is another company called Park that makes a conversion kit that is less expensive. Still lots of money for for basically a plastic box and a receptacle. I used to work in a electrical shop and have a parts catalogue still, will have to see what othere options are avaible.
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Old 04-30-2012, 06:27 AM   #9
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Maybe I'm just lazy drfife, but I like just being able to plug it in and see right there what I'm facing. I know there is a remote feature on the hard wired version, but the portable gives me information when I'm standing right there. I'm not terribly concerned about theft, but do have a locking cable that I will use.

Also, I most likely will use it with other RV's at some point and if it were hard wired that would obviously not work and I definitely don't need two of them.

As I stated in my first post, I was at this same park last summer, but this year the wiring issues are really bothering me. Maybe I have been there long enough now to see more than I did last year, or at least know more about what I am seeing.

The voltage is good and was all last year also, but the open neutral and/or ground is what I'm really scared about. This unit will eliminate those issues as well as others.
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Old 04-30-2012, 06:45 AM   #10
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I don't know if the portable units protect you from anything other than voltage spikes. The hard wired models do and that's why I used that version, not because I'm worried about theft. Mine lives in the bottom of the cabinet beteen the two chairs. There's no space lost because that's where my electrical service comes in anyway.
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