This is great information. Thanks for providing it. Mike Brannon Virginia Lee 93295 1978 C&C 36 CB Virginia Beach, VA
> On Apr 10, 2020, at 9:50 AM, Richard Klajnscek via CnC-List > <cnc-list@cnc-list.com> wrote: > > Greetings all, > > Back in the mid 1980s I briefly ran the rigging shop at Hinterhoeller Yachts > where l learned a nice way to permanently secure conduit inside Nonsuch > masts. I used the technique very successfully on my C&C 30 about 26 years ago > and it’s solid as a rock. Forgive me if I’m repeating what may have been > posted in the past, but I only joined the list in the past year. Pictures and > diagrams would make this easier to describe this whole routine, but I don’t > have any so here we go… > > Glue sections of appropriately sized conduit (about 1” I.D.) together > basically for the full length of the spar - between the upper and lower wire > exit holes. About every five feet over the whole length, drill about 1/2” > holes through one side of the tube and about 5/32" holes through the other > wall, directly in line. Thread 3/16” x 1.5" round head SS machine screws > through the conduit so the studs protrude out of the tube (the heads are > inside the tube - that’s why you need the 1/2” holes to be able to access and > screw them from the inside out). You need conduit that is at least 1/8" thick > so that the studs will hold well enough when threaded in place. Lay the > conduit on the outside of the mast where you want it (mine is off centre on > the leading edge), tape it in place and mark (exactly) the location of each > of the studs, making sure that you add adequate-sized holes for any > mid-height exits for accessories (bow, deck, spreader, steaming, radar, > wifi). Make sure to use grommets for these mast holes. Snap a chalk line on > the outside of the spar to make sure the holes you are about to drill in your > precious spar are nicely lined up. NO MISTAKES! Feed the tracer lines for > pulling wires and spare line(s) using a separate tracer line for each exit. > You may want to feed the lines at the beginning of the process, before gluing > the conduit together if you don’t have a long enough pole or other clever way > of feeding line. The holes you drill in the spar need to be somewhat > oversized (say 1/4”) so that the studs will fall through easily. Push the > conduit into the mast to the correct location, pull the tracer lines through > the exit holes and tie the ends off. Then wiggle and maneuver the whole works > until the studs fall through the holes, using gravity to advantage. Make sure > that tracer lines aren’t pinched or caught before you add the nuts and > tighten the tube down. Using SS nylock nuts. Use a vice grip to lightly hold > the studs at the mast surface so you can get the nuts started until you have > about a half inch of stud on the other side of the nut, then switch the vice > grip to the end of the stud and crank the nut tight (within reason). Now you > can pull your wires/cables/spare lines using your tracers. > > Have fun and sleep well when rolling at anchor. > > Rich Klajnscek, P.Eng. > C&C 30 #9, Gloucester, MA > C&C 39 #59, Hamilton, ON > > >> On Apr 9, 2020, at 4:55 PM, Josh Muckley via CnC-List <cnc-list@cnc-list.com >> <mailto:cnc-list@cnc-list.com>> wrote: >> >> David, Yes. The mast on my 37+ from Offshore Spars came with a conduit of >> sorts already installed. It was black poly tubing riveted to the forward >> inside face of the mast. During the mast rebuild the yard suggested >> upgrading to pvc since it would be a little more robust. >> >> Josh Muckley >> S/V Sea Hawk >> 1989 C&C 37+ >> Solomons, MD >> >> >> >> >> On Thu, Apr 9, 2020, 07:31 David Risch via CnC-List <cnc-list@cnc-list.com >> <mailto:cnc-list@cnc-list.com>> wrote: >> So let me understand this...folks have installed conduit for the length of >> the mast inside the mast...? Thought of that but abandoned due to >> complexity or did I overthink? >> >> Sent from my Android. Please forgive typos. Thank you. >> >> From: CnC-List <cnc-list-boun...@cnc-list.com >> <mailto:cnc-list-boun...@cnc-list.com>> on behalf of Shawn Wright via >> CnC-List <cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>> >> Sent: Wednesday, April 8, 2020 11:22:38 PM >> To: cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com> >> <cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>> >> Cc: Shawn Wright <shawngwri...@gmail.com <mailto:shawngwri...@gmail.com>> >> Subject: Re: Stus-List securing cables in mast >> >> I used CL200 for our irrigation system, as it was about half the price of >> CSA/UL approved schedule 40. It is definitely thinner, which in this case is >> a bonus. For water pipes, not so much, but I have >1000' in the ground and >> no leaks after the 10 years, except for those pipes I've hit with something. >> In my experience, schedule 40 has much higher strength and impact >> resistance, and schedule 80 even more so, but it's not an issue inside the >> mast. For making a support for a winter cover, I'd use sched 40. >> >> -- >> Shawn Wright >> shawngwri...@gmail.com <mailto:shawngwri...@gmail.com> >> S/V Callisto, 1974 C&C 35 >> https://www.facebook.com/SVCallisto <https://www.facebook.com/SVCallisto> >> >> >> On Wed, Apr 8, 2020 at 9:06 AM Josh Muckley via CnC-List >> <cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>> wrote: >> Yeah that CL 200 is the pvc which I have for reference. When I pulled the >> upc off the side it came up as scheduled 40. I don't know the difference. >> I've never really had to research pvc pipe so I'm a little out of my >> element. >> >> Josh >> >> On Wed, Apr 8, 2020, 11:27 Shawn Wright via CnC-List <cnc-list@cnc-list.com >> <mailto:cnc-list@cnc-list.com>> wrote: >> I had hoped to pull our mast soon, but with the mast crane out of service >> due to covid, it will have to wait. Some great info on this thread, so I >> will save it. >> >> One option for thinner PVC is to use white (water) PVC, which you can get in >> a CL200 rating (at least in Canada) for light use; it is a bit thinner >> walled, and UV resistance is not an issue inside the mast. You could also >> seek out aluminum electrical conduit, which will be even thinner. Regarding >> sizing, I just installed two 3/4" conduits (grey electrical type) through >> the bilge for wiring, and was able to get the wiring for both Garmin and >> Standard horizon depth sounders through one conduit by staggering the >> connectors - two 7 pin DIN twist lock, and one RCA for the old SH unit. Once >> the connectors are through, there is plenty of space for smaller cables. >> Holding the conduit in place while drilling and riveting might be challenge >> also. Too bad the mast doesn't have a wire track like some of the newer >> ones. >> >> >> -- >> Shawn Wright >> shawngwri...@gmail.com <mailto:shawngwri...@gmail.com> >> S/V Callisto, 1974 C&C 35 >> https://www.facebook.com/SVCallisto <https://www.facebook.com/SVCallisto> >> >> >> On Tue, Apr 7, 2020 at 3:30 PM Nathan Post via CnC-List >> <cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>> wrote: >> All, >> >> As one of my boat projects this spring I am replacing the electrical wiring >> in my mast. The mast is currently down (horizontal) so now is the time to >> do it. I want to secure the wires in the mast, in particular to reduce >> noise (when rocking at anchor). Wisper is a 1981 C&C 34 with a keel stepped >> mast and 5 internal halyards in addition to the wires. The cables are for >> wind instruments, masthead and steaming lights, VHF coax, and radar (power >> and communication) so it will be a substantial bundle with a separate drop >> at the spreader. The two approaches I am considering are: >> >> 1) Creating a bundle (wiring harness) of the cables and placing 3 large >> cable ties on the bundle at perhaps 2 or 3 foot intervals with the tails >> sticking out at 120 deg angles that will bend over and press against the >> mast and keep the cables in the middle. I would use Panduit metal barb >> outdoor zip ties which are robust, smooth edged, and long lasting. >> >> 2) Installing a PVC conduit (using rivets?) with a feeder line for the >> cables and then running the cables through it. >> >> There is support of both methods in various forums online. Cable ties are >> definitely the simpler method. The main advantages to the conduit that I >> see is being able to run an additional wire through it at a later time >> potentially with the mast up. Also I might be able to run cables from top >> to bottom so that a large connector can remain preinstalled on the top (for >> example for the radar unit) rather than needing to feed everything in to the >> bottom at once and then fishing the ends out the various small holes in the >> mast and reattaching connectors. The disadvantage is the effort required to >> install it and the additional holes I would need to create in the mast. I >> am also unsure how quiet either solution would be and the relative chance of >> tangling or extra friction or wear on a halyard although most info on-line >> seems to indicate that the conduit is the better choice for that. >> >> With the conduit approach, I am also debating if two smaller conduits - one >> to the spreader and one to the mast head - would make more sense than having >> a hole in large conduit at the spreader location. >> >> Has anyone done either of these securing approaches? What are your thoughts >> on the success? How much does it silence the cables? Is the effort for the >> conduit worth it? >> >> Thanks, >> Nathan Post >> S/V Wisper >> 1981 C&C 34 CB >> Lynn MA, USA >> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each and >> every one is greatly appreciated. If you want to support the list - use >> PayPal to send contribution -- https://www.paypal.me/stumurray >> <https://www.paypal.me/stumurray> >> >> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each and >> every one is greatly appreciated. If you want to support the list - use >> PayPal to send contribution -- https://www.paypal.me/stumurray >> <https://www.paypal.me/stumurray> >> >> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each and >> every one is greatly appreciated. If you want to support the list - use >> PayPal to send contribution -- https://www.paypal.me/stumurray >> <https://www.paypal.me/stumurray> >> >> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each and >> every one is greatly appreciated. If you want to support the list - use >> PayPal to send contribution -- https://www.paypal.me/stumurray >> <https://www.paypal.me/stumurray> >> >> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each and >> every one is greatly appreciated. If you want to support the list - use >> PayPal to send contribution -- https://www.paypal.me/stumurray >> <https://www.paypal.me/stumurray> >> > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each and > every one is greatly appreciated. If you want to support the list - use > PayPal to send contribution -- https://www.paypal.me/stumurray >
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