All tangled up in blue

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Oct 2, 2008
1,424
Island Packet 31 Brunswick, Ga
Well not blue, but light anyway. My girl has lights.
I wired a D.C circuit with four 10 watt lights in parallel. The first is in the bow of the v birth just aft of the cubby hole under the anchor locker (pictured), the second just forward of the forward bulkhead on the starboard in the v birth. the third over the forward sink the forth in the salon. Then i ran another circuit for the galley sink. I connected it (for test) to the battery and it worked!. I had nice warm lights.
The wire was 16 G boat cable. Used marine grade connectors, with heat shrink tubing. Used ratched crimpers, but still had a bad crimp every now and then. :cussing: The self adjusting strippers were worth the 20 bucks. they strip the outer jacked, then you reinsert both wires and they strip the wire cover. Those tools are the ones pictured.
I really wanted LED, but bought incandescent. I will change over to led as time goes by i hope.
Next is to protect the circut just after the switch panel with 15 amp fuses. I will use a common bus for the negative ground. I have the oday switch box that came with the boat. It has a common hot lead for the circuits.
I will run my mast and bow light along the port cabin shell liner. The wire puller i got is the only way to go. I was able to use it to thread the cable through most every angle and obstacle.
The voltage drop for 16 gauge is a little high for the length and current of the circuit. I could get some dimming if all lights are on at the same time. I did not feel any warmth at any connections with all lamps burning at the same time for over an hour so there is no heating problem that i found. 14 gauge would have been more appropriate as the length of the run was a little over 35 feet round trip accounting for turns etc. As i change over to LED the amps drops from around two to around .2 per lamp. That is a big savings
As a cost comparison, the LED cabin surface mounts are around $72 (defender marine), incandescent $29. Since I was buying six lamps (one is a swivel reading lamp) the extra cost really added up. However 250 feet of 16g boat cable is $85 dollars (genuinedealz.com) and 250 feet of 12 gauage boat cable is over $250!.:eek: So it can be almost cheaper to use LED since you can use much smaller cable for your circuits.

ps. looks like the pictures didn't turn out, they are sideways and i can't get them to turn upright, they are upright on my computer. hmmmmm oh well
 

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Raftco

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Sep 23, 2009
59
Catalina 30 MKII, Fin Keel Harwich Port, MA
Nice job!

Having just done the same job on my O'Day 25, I feel your pain. Looks good, I did put in a few of the cheapest LED's I could find, but am still on the fence about whether I like them or not. The light on those isn't as 'warm' as the old style and they don't seem to produce as much light.

If you haven't already, it's a good time to upgrade your circuit panel also. Worth knowing that everything has been addressed.
 
Oct 2, 2008
1,424
Island Packet 31 Brunswick, Ga
Nice job!

Having just done the same job on my O'Day 25, I feel your pain. Looks good, I did put in a few of the cheapest LED's I could find, but am still on the fence about whether I like them or not. The light on those isn't as 'warm' as the old style and they don't seem to produce as much light.

If you haven't already, it's a good time to upgrade your circuit panel also. Worth knowing that everything has been addressed.
I agree, i have a panel picked out, it has six circuits, and they are fused as well as backlite, i am not sure if i want to spend the $140 or not. I checked out my original panel and it is sound, but of course i will have to put in a fuse for each circuit. I am intent on making this a profesional install. No rats nest of wires,use only marine grade hardware, and proper connections and run supports.
I am going to reduce my AC to just two outlets, one just under the port settee, and at the galley. I will still have to do some review of safe AC circuits.
I do have an ac fuse box and breaker so that helps.
keith
 
Feb 6, 1998
11,760
Canadian Sailcraft 36T Casco Bay, ME
I wired a D.C circuit with four 10 watt lights in parallel.

The wire was 16 G boat cable.
Yes 16 GA is to small for four 10 watt lights with a 35 foot run if you want to remain at a 3% voltage drop. With four 10 watt bulbs at 12v you have .83 A per bulb.

16 GA at 35 feet with a 3% voltage drop can handle a max of a 2 A load.

If you are happy with a 10% voltage drop then you're ok.



As a cost comparison, the LED cabin surface mounts are around $72 (defender marine), incandescent $29. Since I was buying six lamps (one is a swivel reading lamp) the extra cost really added up. However 250 feet of 16g boat cable is $85 dollars (genuinedealz.com) and 250 feet of 12 gauage boat cable is over $250!.:eek: So it can be almost cheaper to use LED since you can use much smaller cable for your circuits.
The $29.00 surface mount lights from Defender seem to have two 10W bulbs. If so be careful using 8 bulbs at a time as you battery and wire could potentially suffer. I am going to guess you only have the single bulb unit but the only surface mount light I could find at Defender was a dual bulb surface mount not a single..

Defender Light (Link)

If that is the light you bought be careful as it actually has two bulbs in it not one..
 
Oct 2, 2008
1,424
Island Packet 31 Brunswick, Ga
Thanks MaineSail, you are right, there are two 10 watt bulbs. I will have to be careful not to run them all at once. My goal is to slowly replace the bulbs with Dr LED replacements in the long run. Then i can run all the bulbs at once and my boat will look nice and cheery inside.
Speaking of lights, can someone comment on using oil lamps for llight?
Keith
 
Oct 2, 2008
1,424
Island Packet 31 Brunswick, Ga
Also I need to correct my prices listed above for the boat cable. At Genuinedealz, the 10G boat cable duplex was $240 for 250 foot role, the 14G was only around $140. The 16G i bought was 85 for a 250 foot role. So the cost advantage of boat cable for using LED lights was not as great as i stated.
 
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