Mast conduit capacity questions, how many and how much

[CbKl]

Happy Spring everybody,
We have 1993, Legend 40.5. I'd like to sample the wisdom and observations of fellow sailors. I'll be stepping the mast in 2 weeks for the installation of upgraded parts.

I'm adding radar, air horn (1/2” airline), new electric wires, new anchor light new low loss/thicker antenna cable and augmented reality camera to the mast.
I want to confirm that there are 2 conduits inside the mast, one to the top and the other to the spreader light.
What is the ID of these conduits?
I believe they are attached to the forward side of the mast by a lengthwise split that goes over a "T" that is extruded on the inside of the mast, Right?
How many of these T extrusions are present? Can another conduit be added to any extra extrusions or some other mounting object inside the mast?
I believe that the conduits protect and hold quiet the wires they contain, or is there another reason?


Thank you in advance for updating my understanding.

 

[Crazy Dave Condon]

First you need to identify the mast mfg. could it be Keyon Isomat or Z Spar? Look for mfg sticker on mast or boom

 

[CbKl]

Z spar is the mfg.

 

[Rich Stidger]

I don't know the answer, but I am interested in what you find. Pictures too. I have a 1997 h40.5 with a Z-Spar mast like you.

 

[Crazy Dave Condon]

Call Dave with US Spars in Gainesville, Florida as Z Spar is synonymous with US Spars

 

[CbKl]

Figure from Dave, stay tuned for more info.

 

[jssailem]

When I had my mast down, I rebuilt the running rigging (removing the rope/wire rigging) sending all down the mast internally. Installed thin wall pvc pipes to serve as conduits for the wires. Strived to used as few wires and minimize weight aloft as much as practical.

With the list of tech hardware you appear to be adding, weight aloft may be something you should consider. Weight aloft influences your boats righting moment.

 

[CbKl]

Crazy Dave, thanks for the idea.

The usspars Dave wasn't available this am but his associate was helpful and knowledgeable as others have noted on this forum. He provided the following info:
There are 2 PVC 1" ID conduits. A long one runs to the top of the mast. The shorter stops as the deck/steaming light. They’ve used 10’ sections of white irrigation tubing. It’s first run past table saw to provide flat spot. Then run through again to provide split for the “T” of the mast to be inserted. He thought that on my 31 year old boat, I should be prepared to replace these.

The 10’ sections are butt jointed. That seam might be source of sticking when cables are run through it. A camera run through the conduit will identify if/where any of the seems have popped off their attachments.

Other advice he offered for the newbie:

– new holes should be 100mm from other access holes and 125 mm from structural members such as spreader bolts etc.
-ant-seize is used on rivets and Loctite used on threaded connections. (it has anti seize properties too. Makes sense, I hadn’t realized that before.)

Later this month, I'll share pictures of my mast.

 

[Crazy Dave Condon]

@CbKl

your welcome but most importantly you shared the information with others here on this forum. May I suggest posting in the Hunter and model boat owners upgrades under boat information