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Old 12-13-2012
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Wire Labeling So It Lasts

I get asked quite a bit how I label my wires and finally got around to an answer that was prompted by a post on another site a few days ago. I did not always use this technique and over the years have tried lots of "solutions" before settling on a process that both works for me and tends to last in the marine environment....

I have found that a simple Brother P-Touch label maker from Staples works wonders. These label makers often go on-sale for $9.99 to $20.00. Even for the one pictured I paid just $19.99 plus the TZ tape. Using a P-Touch is not however without some tricks and techniques, which I will explain.

In order to use a Brother P-Touch you will want to invest in their TZ label tapes shown in this photo. they come in many colors but black letters on white tape seems to work best. These tapes do not turn black when you heat shrink over them like the cheaper Brother tapes do. The cheaper labels will turn black once you hit them with a heat gun but the TZ labels survive, provided you don't go over the top with your heat gun....
Brother P-Touch & TZ Labels




For smaller individual wires, 16GA to 10GA, I also use the IDEAL #44-103 1 - 45 number kit. These are a cloth tape numbering system that only require one piece of "tape" rather than making your own double digit numbers with a 1- 9 numeric kit. They are also available in higher numbers if you need them.

I buy the IDEAL #44-103 at Home Depot. They are quite inexpensive and a single book will last you multiple wiring jobs.
IDEAL 1 - 45 Cloth Tape Wire Numbers




This is what each page of the #44-103 booklet looks like. There are 3 identical numbers on each short piece of tape so that the wires number is viewable from nearly 360 degrees around the wire. Each page also contains a few "single" numbers...
The Numbers




The TZ tapes also fit in the least expensive Brother P-Touch. This one cost me $9.99 at Staples..

For marking the wire, usually in duplex, triplex and larger battery cable I will often write on the jacket with a Sharpie marker first. This is a back up to the actual label..

As can be seen here I have labeled the wire with the Sharpie, made the P-Touch label and cut the clear heat shrink.
Brother P-Touch Small Version




Here the P-Touch TZ label has been applied over the Sharpie writing.
Labeling Wires



Now I slide on some clear heat shrink tubing that has been cut a tad longer than the P-Touch label.
Labeled Before Shrinking



The last step is to shrink the clear tubing with a heat gun. DO NOT over heat it as this is not necessary just shrink it until it is tight. I find for duplex wire in 12GA and 14GA I use 1/2" clear shrink (NOT ADHESIVE LINED). For larger battery cables I use 3/4" to 1"...

The application of the clear heat shrink over the label creates a label that is robust enough to survive in the marine environment. It is one of the only methods I have found that actually lasts. It takes a little more time to do but as you become proficient it moves along quickly.
Labeling Wire - Shrunk



Over time I have learned that my customers who are willing to pay for the labeling want, and prefer, the wires to be labeled in a "common sense" fashion. I try to label so that even a novice with boat electrics can understand it. This is not always easy but once you get a system it becomes easier.

Common sense labeling on a boat means that each label is wired as "TO" or "FROM" and the device, load, panel, charger, panel etc. that corresponds with that wire...

In this photos you can see how easy it is to determine what goes where and what comes from where. If you needed to find the in-line fuse for the Duo Charger it would take two seconds to find.

For those of you that are marine electrical professionals this also makes over the phone trouble shooting considerably easier when your customer has an issue in a far and distant location from where you are. These little details go a long way towards your customers overall satisfaction with you and may turn into referrals! How many boaters know how to read a wiring diagram or even could locate it on the boat..?

I like "common sense" labeling where it is appropriate.
Back Side of A Battery Switch



Even on a small battery system labeling can make sense. This owner can disconnect and re-connect his system very easily and knows where every wire goes.. In this photo he has disconnected the banks for the winter, and removed any potential for parasitic loads, by removing the DC neg wires from the aft most battery...

Even if he forgot where the wires went, in the spring they are clearly labeled so reassembly is easy.
A Small Battery System



Earlier I mentioned the IDEAL number packs. In this picture I have labeled this wire #5. I have also cut a 1/2" length of 1/4" clear shrink.
Using The Ideal Numbers




When labeling individual wires be sure to place the number far enough down the wire so that when you strip & crimp on the terminal you have the space to do so. I usually crimp the terminal then slide the clear shrink back up the wire and melt both the terminals heat shrink and the number shrink together.

While the IDEAL numbers are fairly durable the addition of clear heat shrink takes it to the next level of durability. Durability with IDEAL numbers depends upon the location in the vessel.

Behind an AC/DC panel they survive pretty well but in a battery compartment or engine space not quite as well.. Just use your common sense as to when & where you'll want to use clear shrink over the number..

Some owners will be happy with just the stick on numbers and some are willing to go to the clear heat shrink step. As a DIY I'd suggest going over the IDEAL numbers with clear shrink as it costs pennies to do so.
Shrink & Done




Sometimes when I get a call to address sloppy wiring the poor owner barely stands a chance to even properly disconnect the 12V system for winter.

Note the P-Touch label about to fall off in this photo. This is why the clear heat shrink is key.. Do you know where any of these wires go? Neither did the owner....
Before



This is the same battery bank..... Much easier...
After



Like anything you can take your labeling to what ever level you want. This owner wanted the major neg wires labeled too and I had just completed that in this photo.....
Take It To Any level You Want



Good luck!!
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Old 12-13-2012
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Re: Wire Labeling So It Lasts

If I had the capital, I would clone you and start a custom boat building yard.

For now, I'll have to stick to cloning sheep...don't ask.
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Old 12-13-2012
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Re: Wire Labeling So It Lasts

Really nice work.
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Old 12-13-2012
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Re: Wire Labeling So It Lasts

Beautiful work and report. If I was that OCD, I'd be working on somethong right now...instead of on here reading posts! Good ideas to be applied once I get started..thanx
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Re: Wire Labeling So It Lasts

Quote:
Originally Posted by Maine Sail View Post
I
Like anything you can take your labeling to what ever level you want. This owner wanted the major neg wires labeled too and I had just completed that in this photo.....
Take It To Any level You Want



Good luck!!
RC,

In this picture the far right negative on the shunt, does it go to the battery monitor Is the positive wire in this same groups area I notice has a bump ( in it close to the battery teminal (+). Is that an in line fuse holder?

Dave
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Old 12-13-2012
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Re: Wire Labeling So It Lasts

Big fan of P-Touch, though we have a long road ahead to get where you are. We now leave our home P-Touch on the boat, use it nearly every weekend. The key is to keep many spare cartridges on-board.

Have you calculated how much P-Touch ribbon you have used, calculated in yards/miles
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Re: Wire Labeling So It Lasts

Quote:
Originally Posted by chef2sail View Post
RC,

In this picture the far right negative on the shunt, does it go to the battery monitor Is the positive wire in this same groups area I notice has a bump ( in it close to the battery teminal (+). Is that an in line fuse holder?

Dave

Right side of shunt (battery side) goes direct to battery - post. Orange fused wire on + post is the battery monitor red feed wire. I hate the crappy Victron in-line fuses so replace them with a better quality product right out of the box. That entire orange/red wire is only about 10" long and from a top view it is clear where they both go... The "bump" on the positive post is an MRBF battery bank fuse..
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Last edited by Maine Sail; 12-13-2012 at 04:50 PM.
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Old 12-13-2012
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Re: Wire Labeling So It Lasts

Had this project on the list for spring 2013 prelaunch, now realize I will need to take it up a couple notches to DO IT RIGHT, thanks MS!
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Another great post with great timing as I am rewiring most everything related to the engine. THANKS!!!
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Old 12-14-2012
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Re: Wire Labeling So It Lasts

Apparently the trick is in the TZ tape, which is a 3-layer laminate, not like the cheaper tapes that are just "burned" in the label maker. The cheaper (one layer) tapes are thermally "burned" to make the black printing, and they will eventually turn all-black from ambient heat. The TZ series actually transfer the "ink" to a substrate, then cover it with a top layer, so what you've got in the finished label has no way to change. (At least, no way to go all black, although I'd guess the layers could come apart in time.)

WalMart also carries the stuff, although apparently random models and tapes are stocked. Still isn't cheap but routinely cheaper than the office supply stores.
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