Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 04-08-2012, 10:35   #16
Registered User

Join Date: Apr 2010
Location: Newport News VA
Boat: Egg Harbor sedan cruiser 1970
Posts: 829
Re: How many 30 Amp inlets?

"Pedestal has two 220/125 V 50 amp outlets"

Sounds like a split phase 240v system like as in a standard house.
Voltage from hot to hot 240 or 220v AC
Voltage from hot to neutral is 120v or 125v
Hots are on separate phases, so if you graphed the sine waves they would overlap each other.

So the splitter takes each hot wire in the 50 amp circuit and sends it on, one to each 30 amp plug
the neutral is split in two and shared down to the 30 amp outlets.
Ground is just ground.
__________________

__________________
sdowney717 is offline   Reply With Quote
Old 04-08-2012, 11:08   #17
֍֎֍֎֍֎֍֎֍֎

Cruisers Forum Supporter

Join Date: Apr 2006
Posts: 13,037
Re: How many 30 Amp inlets?

$1000...Wow, I didn't realize they were requiring FAA-approved parts. (sigh)

Stu-
Offhand I agree with you about management, but it isn't always cheaper.
I knew a business where the water main for the plant came in through the loading bay wall up near the ceiling, for some arcane reason. The plant manager and regular driver knew to back the trucks in on the other side. So one day a new driver backs in neatly in the middle and shears off the water main. (Which among other things trips the sprinkler alarm and brings the firemen, who are not amused.)
What does the plant manager do? Calls a plumber, has the pipe fixed. I asked him, aren't you going to at least have some angle iron bolted up to guard that, so it won't happen again? "Oh, no, we don't need to do that, the driver should know better."
Yeah, well....When the resources allow it, I have to say I prefer systems that protect themselves from "pilot error".

$1000 for what is still basically a power cord...wow, and here I thought vacuum cleaners were overpriced.

Sailorman, the only caveats I would see on adding a dedicated line for the AC, are to make sure there are reverse polarity (netural/ground swap, etc.) indicators on BOTH AC lines, on the panel. Because sometimes, neutral and ground get swapped and odd things happen. And of course, you need to make sure both feeds are totally isolated, in case you wind up on two phases of the shore power, which apparently can result in 240VAC faults when the gremlins get loose. You'd have to ask the pros, but that might mean no common ground between the systems as well. I've seen some odd threads about potential glitches like that, and while your marina may be all new and shiny and up to code...Was it Edison or Tesla, that said AC electricity would just sneak out of the socket and electrocute people in the night?
__________________

__________________
hellosailor is offline   Reply With Quote
Old 04-08-2012, 11:24   #18
Senior Cruiser
 
Sailmonkey's Avatar

Cruisers Forum Supporter

Join Date: Sep 2009
Location: Houston
Boat: '76 Allied Seawind II, 32'
Posts: 5,773
Re: How many 30 Amp inlets?

Quote:
Originally Posted by hellosailor View Post
$1000...Wow, I didn't realize they were requiring FAA-approved parts. (sigh)
It's insane isnt' it!!

I just pulled some numbers from defender,

50A 125/250 adapter $190

50A 125 50' cord $558

50A 125 boat inlet $165

50A double pole breaker $31

25' 8/3 wire Guestimate of $250
__________________
Sailmonkey is offline   Reply With Quote
Old 04-08-2012, 11:57   #19
Registered User
 
Agape39's Avatar

Join Date: Jul 2012
Location: Hollywood, Fl
Boat: Corbin39
Posts: 138
Quote:
Originally Posted by hellosailor
$1000...Wow, I didn't realize they were requiring FAA-approved parts. (sigh)

Stu-
Offhand I agree with you about management, but it isn't always cheaper.
I knew a business where the water main for the plant came in through the loading bay wall up near the ceiling, for some arcane reason. The plant manager and regular driver knew to back the trucks in on the other side. So one day a new driver backs in neatly in the middle and shears off the water main. (Which among other things trips the sprinkler alarm and brings the firemen, who are not amused.)
What does the plant manager do? Calls a plumber, has the pipe fixed. I asked him, aren't you going to at least have some angle iron bolted up to guard that, so it won't happen again? "Oh, no, we don't need to do that, the driver should know better."
Yeah, well....When the resources allow it, I have to say I prefer systems that protect themselves from "pilot error".

$1000 for what is still basically a power cord...wow, and here I thought vacuum cleaners were overpriced.

Sailorman, the only caveats I would see on adding a dedicated line for the AC, are to make sure there are reverse polarity (netural/ground swap, etc.) indicators on BOTH AC lines, on the panel. Because sometimes, neutral and ground get swapped and odd things happen. And of course, you need to make sure both feeds are totally isolated, in case you wind up on two phases of the shore power, which apparently can result in 240VAC faults when the gremlins get loose. You'd have to ask the pros, but that might mean no common ground between the systems as well. I've seen some odd threads about potential glitches like that, and while your marina may be all new and shiny and up to code...Was it Edison or Tesla, that said AC electricity would just sneak out of the socket and electrocute people in the night?
It was Edison, he was trying to promote hid DC over Tesla's AC . These cords are crazy priced, I've made my own but weather proofing can be an issue, I just use the management method, no worries
__________________

__________________
Agape39 is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 01:38.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.