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Power line 1 showing zero on the voltmeter

Discussion of batteries, chargers, wiring, generators, distribution panels, battery switches, etc.

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Re: Power line 1 showing zero on the voltmeter

Postby Viper » September 29th, 2019, 10:22 am

:down:
Unfortunately most folks are under the impression that they don't have to worry about the electrical system because they think breakers will trip and protect them and the boat when they try to push a circuit's limits or something go wrong. That's not always the case as tripping is dependent on a few factors. Your shore power inlets, cords, dockside pedestal, on-board wiring, etc. can burn up and cause a fire withouttripping a breaker.

Unless there is a loose connection or poor wiring practices used, typically mechanically fastened/permanent on-board wiring connections are safe if done right. They usually stand up to vibration and movement which can loosen things up. Shore power cords and their connection points are typically less than a secure/complete contact resulting in a steadily worsening condition which can eventually lead to heated cords and plugs. Once that occurs, the result/condition gets exponentially worse over time and is exacerbated by the lack of power management. While there are some better shore power plugs out there such as the Smart Plug ( https://smartplug.com/, the key is to ensure you're not overloading a circuit and to inspect electrical hardware that isn't permanently fastened such as your shore power hardware.

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Re: Power line 1 showing zero on the voltmeter

Postby Midnightsun » September 29th, 2019, 10:41 am

I will add that Smart Plug is the best thing since sliced bread. So much better in every way. I converted my last boat and also my present Carver. Image
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2007 Carver 41 CMY
Twin Volvo D6-370's
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Viper
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Re: Power line 1 showing zero on the voltmeter

Postby Viper » September 29th, 2019, 10:59 am

I would just caution that unless the dock pedestal also has a Smart Plug outlet, it'll be the weak link that should be inspected often. But at least the fire will be at that end ;-)
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Re: Power line 1 showing zero on the voltmeter

Postby Midnightsun » September 29th, 2019, 2:13 pm

Viper wrote:Source of the post I would just caution that unless the dock pedestal also has a Smart Plug outlet, it'll be the weak link that should be inspected often. But at least the fire will be at that end ;-)


The dock pedestal gets no wave action/movement like boats do so less prone to failure IMHO. As you know smart plugs do not exist and never will at the pedestal due to incompatability with the rest of the world. ;-) That being said I do make sure my dock pedestal connection is tight and has no black marks/wear on it. My connection is basically permanent for the season as my dock lines gets left at my dock all season long. Not to worried about theft since they would have to go to the trouble of unscrewing the several fasteners holding it in place. :-D I do have a spare on board which I call my travel cord. ;-) Same goes for fenders, have 4 large fenders with covers permanant on the dock and my 6 "travel" fenders on board. No messing with cords or fenders coming or going, more time to enjoy the boat. :-D

That being said we are getting brand new pedestals next year throughout the marina. :-)
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2007 Carver 41 CMY
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Viper
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Re: Power line 1 showing zero on the voltmeter

Postby Viper » September 29th, 2019, 8:19 pm

Midnightsun wrote:Source of the post
Viper wrote:Source of the post I would just caution that unless the dock pedestal also has a Smart Plug outlet, it'll be the weak link that should be inspected often. But at least the fire will be at that end ;-)


The dock pedestal gets no wave action/movement like boats do so less prone to failure IMHO.....

Most plug fires that I've dealt with have actually been at the pedestal end. They usually don't have the ability to secure the plug with a tightening collar that will prevent it from moving, the prongs support the weight of the cord from the ground up, and most folks simply disconnect at the pedestal and take the plug with them on board. As a result, the pedestal outlet usually sees the most use and abuse, worn contact surfaces, and widening clearances, all the makings for a very poor connection at that location.

I agree we'll likely not see Smart Plugs at the dock which is surprising as it's in a marina's best interest for more reasons than one. I've often wondered why the makers of Smart Plug don't approach marinas with an incentive or campaign to replace their outlets, or talk to the boat manufacturers about switching over for that matter. I did talk to a company rep about that but haven't heard of any major announcements about that.

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