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Old 03-01-2019, 03:15   #61
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Re: Smart Plug -- Wow!

See also:

http://www.pbase.com/mainecruising/i...g_a_smart_plug
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Old 04-01-2019, 14:11   #62
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Re: Smart Plug -- Wow!

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The feature was removed for the marine market. There is an ABYC requirement that any mains safety device that removes power from a circuit requires manual intervention to restore power. The automatic thermal switch was deemed not compliant.

My opinion is that the ABYC requirement is a bit foolish in this case. And a significant safety feature had to be scrapped because of it. In this case it is simple to ensure that the mains is safely disconnected merely by unplugging the cord. That should be SOP for any electrical work anyway.
I have an original 30A SmartPlug that I purchased several years ago that I am very happy with! Sure, the original plug wasn't as robust but SmartPlug has stood behind their product well beyond any warranty and provided me with replacement parts and an upgraded plug when my original one failed due to the less than robust strain relief design. I'm even more pleased with the new version which seems to be beefier in all respects with much better and more robust strain relief and screw terminals inside the plug.

My unit has the built-in thermal breaker on the inlet and I'm bummed to read that this safety device has been removed. That said, I understand the reasoning behind the ABYC rules against a self resetting breaker.

May I suggest considering a thermal breaker with a reset button inside the center of the inlet in between the pins. The plug could have a small recess in the center to allow the breaker pin to pop up. If the thermal breaker pops power would remain off. The user would need to unplug the shore power cord and would have a visual indicator inside the inlet to check as the possible cause for the loss of power. Pushing the breaker in would reset it and you would have ABYC compliance and I think an even better product.
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Old 04-01-2019, 14:52   #63
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Re: Smart Plug -- Wow!


That is the old site and it won't allow for re-directs...


The current article is here:
https://marinehowto.com/shore-power-...tplug-vs-1938/



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Old 04-01-2019, 15:17   #64
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Re: Smart Plug -- Wow!

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That is the old site and it won't allow for re-directs
How about stripping each page down to a simple templated page, in the center a nice big

This content has been moved to my new site - [click here].

The new site's Home page is [here].

Please stop linking to this old location, update your bookmarks to the new site!
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Old 04-01-2019, 17:17   #65
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Re: Smart Plug -- Wow!

I like our smart plug but I think the side clips are a lot less robust than they need to be. On ours, you really need to push hard to be sure you have a positive lock. We are on our second one when a guest stepped down hard on the plug causing the pin that acts like a hinge to deform the plastic that it is inset in.
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Old 04-01-2019, 17:53   #66
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Re: Smart Plug -- Wow!

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This is wrong information. Install the male smart plug on the boat inlet and the female end on the boat end of the shore cord. The marina end of the cord can stay the same. Most boat fires started by the shore cord do so at the boat end not the marina end.
What is your source for saying "most fires started by the shore power cord do so at the boat end not the marina end."??

You are the one who referenced Mainsails site that addresses this aspect, and I'll listen to him, this is his area of expertise. He illustrated the dockside fire risk issue with the example of the NC McCotter Marina fire that is suspected to have been the dockside receptacle fire source.

Yes, I know how the Smartplug goes together. The point I was trying to make was that the fire risk safety issue is not 100% solved by the Smartplug, in that there is still the risk of fire at the dockside power point which are all the old 1938 tiny contact area "standard" that Mainsail discussed and illustrated so well.

When Smartplug or anybody else succeeds in providing an approved and acceptable dockside female receptacle that addresses the fire risk and that marinas can implement, then we'll have the other significant aspect of the fire risk covered.

That was my point, poorly worded as it was.

Presumably then Smartplug will offer an adaptor for the male end of their shorepower cord that plugs into the new, large contact area Smartplug marina dockside receptacle, or as is, the existing tiny contact area, 1938 antiquated and unsafe one.
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Old 04-01-2019, 18:32   #67
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Re: Smart Plug -- Wow!

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What is your source for saying "most fires started by the shore power cord do so at the boat end not the marina end."??



You are the one who referenced Mainsails site that addresses this aspect, and I'll listen to him, this is his area of expertise. He illustrated the dockside fire risk issue with the example of the NC McCotter Marina fire that is suspected to have been the dockside receptacle fire source.

Dock side connectors are required by code to be mounted in non-flammable boxes (usually steel). Docks are usually annually inspected by authorities (fire department or other code enforcement). Dock electrical boxes are supposed to be mounted well away from flammable materials. At least in the US this is generally required.

Boat side connectors are usually mounted directly on a highly flammable surface (fiberglass). Doesnít take a genius to assess the relative risk is much higher at the boat.

My credentials arenít going to be discussed here since my professional work isnít related to this forum. But I have personally seen several boats burned by shore connectors but never a marina. Based on observation I guess the risk is 5-10 times greater at the boat compared to the dock. Maybe as high as 100 times if I think back on all the boat fires I have read about.

But for goodness sake donít listen to me.
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Old 04-01-2019, 19:16   #68
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Re: Smart Plug -- Wow!

I certainly don't disagree that the ship side connection is the higher risk, it obviously is, and I would agree, by a wide margin.

But the risk outlined by Mainsail is also present with the possibility of poor dockside connection with the existing system that has very low contact surface area.

Is that risk insignificant? I don't know, I could not find any reference to data that shows it has been studied, or case studies on marina fire causation. Hence my enquiring if you have a source for that information. I did not mean to devalue your personal experience, I'm sorry you took it that way.
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Old 04-01-2019, 20:05   #69
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Re: Smart Plug -- Wow!

Quote:
Originally Posted by Maine Sail View Post
That is the old site and it won't allow for re-directs...


The current article is here:
https://marinehowto.com/shore-power-...tplug-vs-1938/



.

Everyone should read this article, which is one of MaineSail's outstanding contributions to our community


Truly, those Hubbell/Marinco connectors are horrible carp which ought to be banned. Those things have almost burned boats of mine down a few times and I will never have one on board again.


Fortunately, we don't use these for the shore side in Europe. We use the vastly superior IEC 6039 blue plugs. But European boat builders continue to put the Hubbell/Marinco connectors on the boat side
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Old 05-01-2019, 09:47   #70
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Re: Smart Plug -- Wow!

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Everyone should read this article, which is one of MaineSail's outstanding contributions to our community

I would also encourage everyone to make a donation or purchase goods from Mainesail, like his excellent butyl tape.
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