Brilliant. We learned so much common sense stuff from this video and Jeff talks in plain easy to understand terms. Thank you.

Very valuable. Thank you for taking the time to make this.

Excellent information and Jeff is great at explaining things in simple language! Thank you so much for these videos

This has been ridiculously helpful. Thank you. I learned a lot of things I've been doing incorrectly.

Thanks for sharing your knowledge,,I worked mostly on cars so I can learn lots from you.thank you very much

You're the man Jeff. Keep them coming

Brilliant ! Just brilliant ! As a relatively new boat owner of a 30 y o yacht, this conversation has helped me to know where to focus. Thankyou Thankyou Thankyou!!

Thank you for producing and sharing! Great content and delivery. I will be soaking up your many other videos :)

Hi Jeff, I love your video’s. I am a boat owner, 30ft. And I work as a automotive electronics installer. But with boats the difference on the code is enormous. But I love it! I almost would apply my self to work for your company as a employee. To bad I’m from Europe.

This is very good sensible advice, its turns out i just finished rewire ring my instrument panel on the fly bridge and i did the strip bar connections to and from reducing a hole bucket full of unnecessary wires, now everything is tag and easy to find,. Like he said, it takes time and patience and a good electrician.

Thanks for the reply. It is mainly to protect my freezer and batteries when connected to shore since sometime the shore breaker trip and it drains the batteries. Thanks again

That was so incredibly helpful. Like a class in itself. What to look for, how to correct, pointing out what's wrong. I learned a lot. You rock? Thank you so much.

This got me excited about learning electrical systems. Thank you, very well spoken.

These audit videos are VERY helpful to me, a beginner. The boat show videos are comprehensive but I retain more from these. Now I'll return to my books and will be able to better visualize what they're talking about.

Jeff you have a really good eye and a world of good knowledge. Thank you for your dedication to the industry and boating safety.

Great video. Very informative. I’ve watched it several time, then got Nigel Calder’s book. This video helps show and explain a lot of important points.

Very comprehensive! Thank you!

Wow Thank you for this in depth explanation! I learned a lot. I leave this stuff to the professionals but now I know what to look for.

I so value your knowledge.

This is a great supplement to my studies! Currently a student at Skagit Valley College Marine Technology Program in Anacortes WA.

What a great video. Very informative with real world boat examples. Everyone should take the time to watch this video. Every boat has room for improvement.

I am a new solar hobbyist and a boater the last few years. I must say Thank You for so much education in a really well produced package. What I learned watching this will take me weeks or months to implement and I am sure to reference this material again.

Excellent video, very informative.

I've watched alot of cotes videos now this one really brings it all together. Also a huge thanks to you guys for sharing this! Theres alot of how to make it work videos but with the little wiring knowledge that I have from being a diesel tech I know they arent the right way. Thank you for sharing the correct way to do thinks it means a lot to guys like me that plan of taking our boats to the limit.

Fabulous to share an audit

With today’s technologies, learning the marine electrical systems has to be the most important system on the boat. Thanks for your informative video on this subject! Even though I’ve been sailing for a number of years, before I would consider becoming a full time “Bluewater Cruiser” I would want to take a year long course on marine electronics/systems and diesel engines.

Very good. Thanks Jeff.

Man. Fantastic! Best explanations I've seen.

This real-world study was excellent and relative this would make a good format i.e. clients' boats of all vintages and more mainstream craft, thanks from Australia

Wonderful job Jeff. You should have classes! Thanks

awesome job I had to rewire my boat and wish i would have found this first as i had to dig through the code to sort out what it should be.. I am a little confused over junctions ie lights i have been splicing in a wire to the main light circuit. I have been using a crimp connector with heat shrink. but this seems a little flaky as oppose to having a junction box.

Thank you very much for this informative video.

Great video. Thanks for a load of good tips

Very informative thanks

Thank you very much for your reply.i guess I have to replace some tape

A lot of awesome info...thank you

Thanks for this great video! You mentioned that code calls for a max of 6 wires. That terminal had 6 but you said that was to many. Did you mean a max of 5?

As a continuing to learn marine electrician but a long time industrial/construction electrician/newly retired Electrical Safety Officer, this is an EXCELLENT overall explanation of the whole boat electrical system and how it all integrates together... The pros & cons as well as the ‘nice to do’ vs the MUST do is very well stated, all without losing most to unneeded techno-babble. Thanks! I’ll be forwarding on the link and using it as ‘back-up’ for some of the more ‘stubborn’ (= cheap!) boaters that I run into.

I learned alot. thank you

Thanks for your safety advice with ac/dc wire coloring.

Excellent job Jeff. Thank you very much! I still leave it to the professionals, but it helps to somehow understand which direction to look at. Greets from Lake of Zurich (Switzerland). One question I have. I own a Bavaria 29 Sport 2014 with twin Volvo Penta 225. There are two 135 Amp house batteries. I have: two fridge, Fusion stereo with amplifier and subwoofer, 3 underwater lights, water boiler, 6 non led lights plus anchor light, 7 inch Raymarine Axiom. Most of this stuff, i switched off besides the fridges and used a boombox instead of the stereo, or batteries for the lights (except anchor) and did not heat water. We have tried to stay out for a weekend (Friday evening 7pm until Sunday at 3pm), obviously that did not work out and on Sunday morning we ended up with 11.4 volts on the clock (I believe this damages the batteries). So my goal is to replace those 135 agm‘s with two 200amp lifpo4 batteries. Do you think that is enough? I am new to boating (first season in 2021).

Great video. I learn so much from you. Question: did anyone notice when you are pointing out the fuse holder on the negative wire from the ACR opened when you touched it? I believe it wasn't latched closed properly.

Excellent information, thank you for your video. You might consider mentioning the difference between European wired boats and US wired boats. If you think folks get confused about AC/DC wiring colors, throw in a couple of brown wires and some older color coded (green w/white stripe etc.) wiring. Thanks again

Connector corrosion: for welding cables going to a battery or alternator that aren’t heat shrieked and have some light corrosion. What is the best way to clean them up and protect them and when is it not worth it and just time to replace them?

Jeff, this was a great walkthrough. I learned much. What are the best connectors to use to tap into both positive and negative 12 volt feeds to a circuit dedicated to, let's say, a bank of cabin lights? I have 6 led lights in parallel. Can the + and - leads coming out of the lights be connected into the main 12 volt cable (dedicated to the lights) using some type of T connector? Thanks.

Now that's an awesome move for an owner to make. Oftentimes they just figuratively slap another band-aid on a new hole without seeing the overall picture.

Is it okay to use Velcro cable wraps instead of plastic?

Nice work.

Great video thanks!!!. I noticed the compass just above the AC/DC panel. I wonder how often he has to swing that compass and how far it is out? Shallow coves or running close to shore with poor visibility are not the times to wonder if the compass is accurate.

well done!

Hi Jeff..very instructive your video. I just found them. I have a question. Would you recommand to add a low voltage disconect switch like the Blue Sea 7635 to prevent complet battery discharge? Thanks again!

Where can I find best practice wiring diagram examples?

Now an automatic battery relay if you have solar and engine if your solar is charging up to standard will it charge the start battery on solar?

The small red lead coming off the “stack” and temp sensor is not fused near or at the battery. All fuses should be in a moisture resistant enclosure or holder. Several lines have multiple extensions and unsealed crimp connections. The one lug that had no heat shrink sleeve was not crimped, it was vice squeezed. Any terminals on batteries, mounted busses or control devices that have potential to spark/short to ground if a part or tool could come in contact should be covered. Ideally the whole battery group should be covered but it may have been removed for the video. This was not a real bad wiring. I bought a boat where the previous guy knew just enough to be dangerous. One terminal was a block of wood with a carriage bolt and at least ten wires and NO fuse at all !

What about the major wire gauge difference between the positive and negative for the windlass? 5:52 he identifies the negative and 10:26 he identifies the positive. Doesn't that effective make the smaller negative provide less current to the windlass than it really needs?

I have watched most of your videos, thank you. But one question keeps arising on the subject of batteries. The discussion evolves around a battery bank going flat then being recharged, but in reality a battery bank is under charge, to a greater or lesser extent the whole time, from one of the charging facilities, (excepting when full). To me this means both drainage and charge is happening at the same time, therefor it is not possible to know how many charges it takes. I'd add my sailing experience is very limited at the moment.

anyone else notice the wine cork plug on the through hull!? Hose clamped next to the Pronautic Charger

when you tapped the black fuse holder the cap popped off. I didn’t see anyone put it back on.

I thought the jury was out on locking washers? Did I miss a meeting? And your point about CB + batt switch being redundant. In the aviation world we have a golden rule that you never use a CB as a switch and you will wear the mechanism. If you want a switch use a switch, if you want protection use a cb or fuse.

Is it ok to use black tape instead of heat shrink .SV Aja

What's wrong with good soldier joints with heat shrink. Forgive me but this seems more solid then 2 crimped connectors hooked up to a bussbar?

So heat shrink only in bilge?

09:50 "Yeah that fuse right right there"...taps obviously disconnected fuse

How many switches can u have on aboat

thank god fo 2x speed :p good video tho thanks man

I laughed out hard when he pointed to the fuse on the ACR at 9:50 point. Right after he said how important that fuse is on the ground side, he touches the fuse and the plastic nut came right off. You can see the fuse wasn't even locked in properly. You can also see some of the wires had at least two automotive butt splice connectors to extend the wire (orange to red and back to orange again) and it goes right into the same terminal as the temperature sensor on the positive terminal.

Can you run two meters off one shunt

Abyc says no more than 4 connection on post. Period

Can you have a wire attached to a fuel hose?

Chaos is natural. Order isn't. Yup.

thats a liability imo. think id pass the torch to someone else unless I really knew the customer well.

What a mess! Rip it all out and start over!

Sloppy wiring. Very cringe.

GDay Teåch 🍎 🦘 I admire also your ‘familiarity’ referencing that of a tree, in explaining the ideal outlay, the core fundaments of powering board, or rack.✅ So in compromising your Welcomed advice, would be high treason 🌲✌️😁 I’m also Thankful 🙏😃 in getting familiar with the acronyms ☂️ Be Well ✌️🥳🌊