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Old 11-06-2015, 10:00 PM   #31
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I don't futz with the ring; once the tang engages on the ground contact I figured it would stay put while camped and it has for many years.
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Old 11-07-2015, 08:59 AM   #32
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Shorepower problems

Folks:
Reace called yesterday and very graciously walked me through connecting the shorepower cord. He quickly identified a key part of the problem--I was expecting "instant gratification" and not allowing the time required for the surge protector to work. Thus, I was assuming that I didn't have a good connection (and power) when I may have had it. Having said that, the connector is very "finicky" and (as several of you have mentioned), very prone to cross-threading. Reace suggested that the problem I was experiencing may have been due (in part at least) to the boot on the plug having slipped down too far over the actual plug. His suggestion of pushing the electrical cord (and therefore the attached plug) further into the boot finally did the trick. A protracted learning experience which hopefully I'll not have to repeat!
In retrospect, for the way I anticipate using the trailer--generally connecting it to shorepower to pre-cool the frig before trips, I probably would have been better off with the standard (non-detachable) electrical cord and just eliminated having to connect the separate cord altogether. Live & learn! Thanks to all of you and to Rae & Reace) for all the ideas and suggestions--I'll explore the right-angle connector.
Dave
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Old 11-07-2015, 01:39 PM   #33
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Quote:
Originally Posted by jamman View Post
There are 2 parts to the removable power cord connection: the actual plug (NEMA L5-30) and the sealing/locking ring. The plug is usually slightly soft yellow, orange or black plastic and needs to be pushed in firmly and then twisted slightly to lock it in. The ring is usually hard black plastic and seals the connection.
Good description

Quote:
Originally Posted by jamman View Post
There are 2 kinds of sealing rings - a threaded one and a 2 tab 1/8 turn twist one - Marinco calls it Easy Lock. The ETI installed connector on the trailer has threads and the bayonet mount like Easy Lock grooves so either kind of ring can be used.
...
Easy Lock rings: MARINCO Easy Lock Ring | West Marine

Most (many? all?) Marinco connectors/cords come with both rings. You can swap them, but it is hard to do so without breaking them.
Quote:
Originally Posted by Dave Rosebaugh View Post
The slots I mentioned are in the threaded area on the outside of the receptacle. They match the inside of the black ring mentioned today: "2 tab 1/8 turn twist one - Marinco calls it Easy Lock"
Thanks - I have not seen these. That makes three weatherproofing add-ons from Marinco:
  1. threaded collar
  2. Easy Lock
  3. Easily Engaged Locking (EEL) System
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Old 11-07-2015, 01:43 PM   #34
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Originally Posted by cpaharley2008 View Post
Actually these Marinco connectors were originally made for marine applications, here is a good video as to how to use and connect these sets as well as explain their limits.
DIY Shore Power | West Marine
in the video it clearly shows use of the locking connection, without the locking ring.
"Originally" the Marino line was intended for marine use - thus the name - but the underlying L5-30 connector is the same existing locking 30-amp three-wire design which has been used for all sorts of industrial and commercial equipment since the 1930's, with no provisions for sealing. The weatherproofing is very much an add-on for marine/RV use, adding security and weather resistance, and not part of the L5 design.
(I didn't watch the video - few online videos are worth it on a rural mobile connection)

I see on that page that Marinco now also has a newer and supposedly better add-on to the NEMA L5-30, instead of the threaded ring - the "Easily Engaged Locking (EEL) System". Unfortunately, their "full line" of cordsets and adapters apparently doesn't include any right-angle products for the trailer end, and the cords are useless for RVs anyway without a custom adapter because they have the locking connector on both ends, instead of a TT-30 (the standard 30-amp campground connector) on the end for the campsite outlet.

Anyone interested in another connector design which should latch securely and is designed to be weather-resistant - and isn't an adaptation of another design - might want to look for the SmartPlug. It is a new design I've seen in forum discussions, which pushes straight in then latches, and has rubber (or similar) seals. Like Marinco's products, it was originally intended for marine shore power use, but the SmartPlug is not based on the NEMA L5 connector. Like Marinco, SmartPlug does not offer a cord with their connector on the trailer end and a standard TT-30 on the campsite end, but at least they do offer separate connectors so customer can custom-build a cord.
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Old 11-07-2015, 01:49 PM   #35
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Quote:
Originally Posted by tractors1 View Post
I don't futz with the ring; once the tang engages on the ground contact I figured it would stay put while camped and it has for many years.
I agree that if you don't need weatherproofing, just not using the hood and collar (threaded or pronged) is a valid option.
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Old 11-07-2015, 02:22 PM   #36
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Quote:
Originally Posted by Dave & Penny Smith View Post
In retrospect, for the way I anticipate using the trailer--generally connecting it to shorepower to pre-cool the frig before trips, I probably would have been better off with the standard (non-detachable) electrical cord and just eliminated having to connect the separate cord altogether. Live & learn! Thanks to all of you and to Rae & Reace) for all the ideas and suggestions--I'll explore the right-angle connector.
Dave
Dave,
I got the idea of making a short light weight cord, (the Escape Cord is a very robust and well made cord) from other forum members. I ordered a male end and spliced it on a 3' - 4' extension cord. We use this to keep the fridge running, plugged into the house for most of the camping season. I try to keep the trailer ready to go all season. It really ruins my camping buzz having to pack the trailer before every trip. Scott

Scott and Lori
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Old 11-07-2015, 04:44 PM   #37
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Yes, I made a short 15 amp power cord to leave BlackJack plugged in at home and use as a backup when traveling. Just plug n a 15 amp extension cord with the length desired. Even has a built in power indicator.....
Amazon.com: ParkPower 104SPPRV Pigtail Adapter, 30A / 125V Locking Connector & 15A / 125V Straight Blade with Locking Screw Male Plug: Automotive
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Old 11-07-2015, 05:41 PM   #38
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For less you can buy the two connectors & a short piece of SJ #12 cord & make your own.
The advantage is it gives you a spare if your Marinco connector on your standard 30 amp cord fails. The Marino 30 amp twist lock connector can be difficult to find on the road...
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Old 11-07-2015, 06:23 PM   #39
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Quote:
Originally Posted by Vermilye View Post
For less you can buy the two connectors & a short piece of SJ #12 cord & make your own.
The advantage is it gives you a spare if your Marinco connector on your standard 30 amp cord fails. The Marino 30 amp twist lock connector can be difficult to find on the road...
Yes, and very handy to have.

Ron
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