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12-04-2014, 13:51
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#1
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Registered User
Join Date: Oct 2012
Location: Seattle, WA
Boat: Lord Nelson 35
Posts: 151
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Mast Wiring
I have a Hunter 34. I have the mast off currently, as I'm replacing my compression post and all standing rigging. While the mast is down, I'm taking the opportunity to replace my wind transducer and cabling, as well as my masthead and steaming/deck lights and associated wiring. I'm now wondering the best way to route my new wiring through my step. When I removed my mast, there were several plug connectors. I could replace these, but I was thinking why not skip the connectors and make straight runs from my masts light fixtures all the way to the panel. I know that I would not be able to remove my mast again without either cutting the wires or removing them from the panel, but I'm pretty much replacing everything right now and don't foresee having to remove my mast again any time soon. Is there any problems with straight runs all the way through? I think this would be the cleanest way. And, does anyone have any experience with Blue Sea clams? Would that be an option for me at my step? I need to make two runs (one for my masthead and one for my steaming/deck light), as well as my transducer cable and VHF, for a total of four wire runs.
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12-04-2014, 13:59
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#2
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Marine Service Provider
Join Date: May 2012
Location: New Orleans
Boat: We have a problem... A serious addiction issue.
Posts: 3,974
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Re: Mast Wiring
Properly installed plugs are more water tite than a clam on a strait run, and allow you to destepped the mast. The trade off is a possible bad connection.
I guess the real question is how important is it to have the best possible connection to what's up the mast. For a light I don't see it at all, for a sattelite communications array it may be worth it.
__________________
Greg
- If animals weren't meant to be eaten then they wouldn't be made of food.
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12-04-2014, 14:22
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#3
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Moderator Emeritus
Join Date: Aug 2005
Location: Carlsbad, CA
Boat: 1976 Sabre 28-2
Posts: 7,505
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Re: Mast Wiring
Straight runs are best because you don't have any breaks in the wiring to corrode or otherwise give you trouble. Of course, you or the next owner will be swearing if you want to pull the mast at a later date. Personally, used a junction strip under the mast step and ran all the mast wiring to that and then on to the panel. Ran the VHF cable all the way to the radio, however.
The Blue Sea Wire Pass Throughs work fine but get pricey if you have multiple wires and take up a bit of real-estate that may not be available in the confines of the step. I drilled a hole in the mast and deck and used through hulls with hose to run the wires below. Saves the problem of the mast step filling with water, soaking the wiring and possible leaks into the deck core.
__________________
Peter O.
'Ae'a, Pearson 35
'Ms American Pie', Sabre 28 Mark II
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12-04-2014, 14:25
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#4
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Registered User
Join Date: Aug 2012
Location: Charleston, SC
Boat: Tayana 37
Posts: 704
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Re: Mast Wiring
I'd stay with plugs. You may not plan on having to pull the stick again any time soon, but things still break unexpectedly.ir would really suck if one of the wires broke after the mast is stepped. Instead of replacing one short wire you'll end up having to replace several long ones instead.
Sent from my SPH-L710 using Cruisers Sailing Forum mobile app
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12-04-2014, 19:09
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#5
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Registered User
Join Date: Apr 2007
Location: Marina del Rey, California
Boat: President 43 Sportfish
Posts: 4,105
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Re: Mast Wiring
Keep it easy to unplug. Your planned improvement isn't.
__________________
1st rule of yachting: When a collision is unavoidable, aim for something cheap.
"whatever spare parts you bring, you'll never need"--goboatingnow
"Id rather drown than have computers take over my life."--d design
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12-04-2014, 19:16
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#6
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Registered User
Join Date: Oct 2010
Location: michigan
Boat: CORBIN 39
Posts: 338
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Re: Mast Wiring
just put enough slack in the wires to replace with a junction box after you cut the wires to remove the mast. sounds like the easiest way to do in my opinion. most trouble with mast wiring is in the junction box, why not start without one?
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12-04-2014, 19:46
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#7
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Registered User
Join Date: Feb 2008
Boat: 2017 Leopard 40
Posts: 2,663
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Re: Mast Wiring
Quote:
Originally Posted by roverhi
Straight runs are best because you don't have any breaks in the wiring to corrode or otherwise give you trouble. Of course, you or the next owner will be swearing if you want to pull the mast at a later date. Personally, used a junction strip under the mast step and ran all the mast wiring to that and then on to the panel. Ran the VHF cable all the way to the radio, however.
The Blue Sea Wire Pass Throughs work fine but get pricey if you have multiple wires and take up a bit of real-estate that may not be available in the confines of the step. I drilled a hole in the mast and deck and used through hulls with hose to run the wires below. Saves the problem of the mast step filling with water, soaking the wiring and possible leaks into the deck core.
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I agree. I've switched to a Blue Sea clam for my radar cable because the prior deck connector became finicky and unreliable. I now use a terminal strip inside the boat (in the headliner) where it's dry and protected. I recommend you use a dab of Teflon synthetic grease to lube the contact areas between the wire's insulation jacket and the rubber compression collar, as an extra measure to seal out the water.
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13-04-2014, 13:32
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#8
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Registered User
Join Date: Mar 2010
Location: Northwest Washington
Boat: Kadey Krogen 39
Posts: 183
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Re: Mast Wiring
I suggest considering leaving extra length, such as in a loop, below decks near the mast. It's usually possible to hide them in the structure or headliner. Then you can cut and spice later, if mast removal is needed. I don't like doing it with radar cables, though. When needing to unstep the mast with a radar cable installed, I would prefer to bite the bullet and disconnect and remove the cable from below decks and take it out in it's entirety, with the mast.
Connections of the other runs, done properly below deck are pretty much trouble free.
__________________
Bill Petras
Kadey Krogen 39
Little Fish
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13-04-2014, 14:11
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#9
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Registered User
Join Date: Apr 2007
Location: Marina del Rey, California
Boat: President 43 Sportfish
Posts: 4,105
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Re: Mast Wiring
Quote:
Originally Posted by muttskie
...When needing to unstep the mast with a radar cable installed, I would prefer to bite the bullet and disconnect and remove the cable from below decks and take it out in it's entirety, with the mast...
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Most radar cables I've dealt with have a large connector at the display end, requiring snaking the cable up the mast and making the connections at the scanner.
__________________
1st rule of yachting: When a collision is unavoidable, aim for something cheap.
"whatever spare parts you bring, you'll never need"--goboatingnow
"Id rather drown than have computers take over my life."--d design
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13-04-2014, 14:22
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#10
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Registered User
Join Date: Oct 2012
Location: Seattle, WA
Boat: Lord Nelson 35
Posts: 151
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Re: Mast Wiring
Quote:
Originally Posted by Terra Nova
Most radar cables I've dealt with have a large connector at the display end, requiring snaking the cable up the mast and making the connections at the scanner.
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I have a Kenyon mast, which I believe allows access to the wires up the length of the mast by removing plates, so I really shouldn't have to snake anything.
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13-04-2014, 14:34
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#11
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Registered User
Join Date: Apr 2007
Location: Marina del Rey, California
Boat: President 43 Sportfish
Posts: 4,105
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Re: Mast Wiring
My mast also has a "removable" plate over the wire channel--removable with the mast un-stepped, off the boat.
__________________
1st rule of yachting: When a collision is unavoidable, aim for something cheap.
"whatever spare parts you bring, you'll never need"--goboatingnow
"Id rather drown than have computers take over my life."--d design
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15-04-2014, 09:07
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#12
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Registered User
Join Date: Oct 2012
Location: Seattle, WA
Boat: Lord Nelson 35
Posts: 151
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Re: Mast Wiring
Quote:
Originally Posted by Terra Nova
My mast also has a "removable" plate over the wire channel--removable with the mast un-stepped, off the boat.
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Yes, mine too. I recently pulled my mast to replace all the standing rigging, so now's the time to replace all of my wiring and update w/ new steaming/deck and masthead lights. I'm also taking the opportunity to install a new wind transducer and cable, and to run my radar cable. My boat doesn't currently have radar. I'm assuming I can drill a hole above the steaming light just large enough to fit the cable an connector through the hole and maybe use a Blue Sea clam connector over that? I'm thinking it should be pretty basic - just have never drilled a hole in my mast before. lol
Steve
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15-04-2014, 09:52
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#13
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Registered User
Join Date: Apr 2007
Location: Marina del Rey, California
Boat: President 43 Sportfish
Posts: 4,105
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Re: Mast Wiring
It is quite likely that there is insufficient room in the wire channel to add the (rather large) radar cable, but worth checking, rather than hanging it inside the mast.
__________________
1st rule of yachting: When a collision is unavoidable, aim for something cheap.
"whatever spare parts you bring, you'll never need"--goboatingnow
"Id rather drown than have computers take over my life."--d design
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15-04-2014, 10:14
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#14
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Registered User
Join Date: Oct 2012
Location: Seattle, WA
Boat: Lord Nelson 35
Posts: 151
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Re: Mast Wiring
Quote:
Originally Posted by Terra Nova
It is quite likely that there is insufficient room in the wire channel to add the (rather large) radar cable, but worth checking, rather than hanging it inside the mast.
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Here's looking into the bottom of my mast. The wires start forward (left in the picture) and, about eight to ten inches up, go through a hole and into the wire channel (the far left of the picture, which is aft on the boat). I don't have the radar cable in hand, but I think it should fit.
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15-04-2014, 10:34
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#15
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Moderator Emeritus
Join Date: Oct 2013
Location: Jacksonville/ out cruising
Boat: Island Packet 38
Posts: 31,351
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Re: Mast Wiring
If you drill into the mast, be sure to de-burr the hole to prevent any stress risers
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