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Author Topic: Mast light wiring  (Read 1768 times)
jhaley_100
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« on: December 17, 2008, 03:04:41 am »
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I want to wire an anchor light on my mast.  Ideally I would like to replace the existing two wires that run under the forward cabin liner to the base of the mast with three wires -- one ground, a positive for the running light and a positive for the anchor light.

Related to this I have two questions:

Is it hard to get the mast base plate on the deck off?

Is there room between the forward cabin liner and the inside of the deck to run another wire?

If anyone has worked on this problem before, please let me know.

John Haley
Mainship #38

Midship 25
Hull #38
josh_richard
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« Reply #1 on: December 17, 2008, 02:53:57 pm »
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quote:
Originally posted by jhaley_100


Is it hard to get the mast base plate on the deck off?

Is there room between the forward cabin liner and the inside of the deck to run another wire?

If anyone has worked on this problem before, please let me know.




Mast step:

I do not know yet.  I just pulled all forward cabin hardware off the other day.  What remains is the mast step so I can not comment on its removal but plan to pull it off the cabin when it warms up a bit (currently -10f).  I do remember there being 4 small screws and sealant.  That might be all there is to it.  The chainplates are through solid fiberglass so I suspect there is a solid fiberglass structure bridging the cabin to the compression post -- (speculation only).  When the step is off, you should carefully check the holes for exposed balsa and pot the holes as per Casey:

http://www.boatus.com/boattech/casey/39.htm
see: "Special Precautions for Cored Construction"

caveat: In talking to friends and reading about this, I would recommend using milled glass fiber rather than silica as under compression, the silica may crack.  Call these guys, you can get small amounts:

http://www.expresscomposites.com/fillers.html
- Fibertech 7232: Milled Glass Fiber

Wiring:

There is room, but tight.  Pop off the caps which cover the interior hardware if present.  You should look for one near the port side of the compression post.  My wires went up through the port side near the aft window (above the stove) and across the cabin top between the headliner and deck.  I appear to have a bit if electrical tape kruft happening where the wires head through the deck.  I plan to cut the plug off on deck, and feed a new wire backwards through the hole and fish if along to the window area to make a new solder connection.  If long enough, I will take the new wire back to the block to reduce voltage drops across the run.  An electrical fish tape will get the wire up the mast.  Fish from the light fitting toward the base and pull the wire back through the mast.  Since these boats have external halyards out of the box, it should be a non-event.

Cheers,

josh richard
duluth, mn

 
herby
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« Reply #2 on: December 17, 2008, 03:31:37 pm »
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Greetings all
I have three lights on my mast, mast head/anchor light and a combination bow light and fore deck light. using two water tight thru deck plugs, the combination light has a common ground so I don't have  a third plug. these drop in to my overhead nav station console.
 
I tried to fish some wiring in between the liner without any luck.

as to the mast step, it comes off with just four 1/4 inch flathead machine screws, the original wiring from the factory went through the mast compression support and under the cabin sole and led aft to the switch panel, all of that wiring was pretty much shot.


Herb Owner of Hull # 237
In Astor Florida
Sail fast live slow

Herb Owner of Hull # 237
In Astor Florida
Sail fast live slow
josh_richard
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« Reply #3 on: December 17, 2008, 05:26:19 pm »
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quote:
Originally posted by herby


as to the mast step, it comes off with just four 1/4 inch flathead machine screws,



Hi Herb!

Is there an additional plate below the step?  What doe the screws attach to?

Thanks,

Josh

 
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« Reply #4 on: December 17, 2008, 06:15:04 pm »
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Hi Josh
There must be an aluminum plate sandwiched in the deck, just a guess as you can't see anything.

Herb Owner of Hull # 237
In Astor Florida
Sail fast live slow

Herb Owner of Hull # 237
In Astor Florida
Sail fast live slow
rdubuque
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« Reply #5 on: December 17, 2008, 11:15:31 pm »
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I have had the mast base off.  A very flimsy affair.  At some point I plan to bolt it to the cabin top.  

This is especially worrisome when raising the mast.   A good amount of upward pressure is place on these 4 small screws.  So odd that on such a good boat small things like this are overlooked.

I ran my wires inside the liner

Bob
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« Reply #6 on: December 18, 2008, 02:33:04 am »
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quote:
Originally posted by herby


There must be an aluminum plate sandwiched in the deck.




I will take a look and post an update when able.

Stay safe this new year everyone.

Josh

 
jhaley_100
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« Reply #7 on: December 20, 2008, 12:21:26 pm »
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Did you install the through deck plugs?  Do you have to drill a hold in the liner to install them?
Are they similar to these made by perko:

http://www.westmarine.com/webapp/wcs/stores/servlet/producte/10001/-1/10001/3071/377%20710%201622/0/Outlets%20&%20Plugs/Primary%20Search/mode%20matchallpartial/0/0?N=377%20710%201622&Ne=0&Ntt=Outlets%20&%20Plugs&Ntx=mode%20matchallpartial&page=CategoryDisplayLevel1&isLTokenURL=true&storeNum=5002&subdeptNum=9&classNum=316



quote:
Originally posted by herby

Greetings all
I have three lights on my mast, mast head/anchor light and a combination bow light and fore deck light. using two water tight thru deck plugs, the combination light has a common ground so I don't have  a third plug. these drop in to my overhead nav station console.
 
I tried to fish some wiring in between the liner without any luck.

as to the mast step, it comes off with just four 1/4 inch flathead machine screws, the original wiring from the factory went through the mast compression support and under the cabin sole and led aft to the switch panel, all of that wiring was pretty much shot.


Herb Owner of Hull # 237
In Astor Florida
Sail fast live slow


Midship 25
Hull #38
herby
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« Reply #8 on: December 20, 2008, 01:31:45 pm »
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Just like the Perco plugs.
If you can fish the wiring in between the deck and liner you won't have to drii all the way through and there shouldn't be any clearance problem as the projection on the bottom of the plug is only 3/8.

As I mentioned my wiring drops down in to the nav station shown in my post in the Mods thraed.

Herb Owner of Hull # 237
In Astor Florida
Sail fast live slow

Herb Owner of Hull # 237
In Astor Florida
Sail fast live slow
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