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[Music] you [Music] I wanted to talk about and I know I'm not talking about isolation transformers but I'm choosing to talk about something that's more popular and easier to install on a boat and that every single boater should have on their boat unless they have an isolation transformer and that's called a galvanic isolator black and white everyone needs to have one everyone should have one the reason you don't is because in the past they used to fail open meaning that you would actually lose the AC grounding connection to shore power that had serious implications for your safety and so very few builders or even owners would choose to actually install one of those but nowadays because they are failsafe they will actually allow you that if ever it does fail it's actually gonna fail back to a wire so worst case you're back to what it was before which is just a wire what it does is this an ability to reduce stray low voltage current on the AC grounding wire I want you to think about when you're this device is of no use if you're in the middle of the ocean you're not connected to shore power so if you never connect to shore power you don't need this if you're connected to shore power and you're in a marina and you have the perfect boat everything about it electrically is done with the utmost care and it is perfection you could have a boat right beside you that is not good the electrical is bad not intentionally maybe there's a fault your boat that boat are all connected via shore power back to the dock effectively every boat in the marina is a cell every single one is connected to ground and their ground is connected to water so they have a choice if I want to go back to ground because my neutral is bad or I'm trying to I have uneven balance am I gonna go through my boat or someone else's boat to go back to shore to even things out this device will block straight current DC current going through an AC grounding connection it basically effectively isolates your boat to limit Straker and corrosion that's happening outside of your boat that device is around 400 bucks give or take and it's not even I mean the physical wiring would be half an hour to do but the question is how do you mount it so it's really easy to install and like I said the reason your boat probably doesn't have one is because they used to fail open they fail open you're going back to the past century I'm not talking about 20th I'm talking 19th century for wiring so that's why they would not install them and you got to make sure you buy one with either 30 amps or 50 amps right the key here is that nothing can bypass the galvanic isolator nothing meaning you need to install it right after the shore receptacle right that's the key if anything bypasses it right it's a choke point right it's like a gate keeper it's like saying I don't want my kids to leave the house well if you have four doors in your house and you're in the front door saying hey I'm here I'm gonna snow buddies going out tonight and there's three other doors well it doesn't matter what you're doing door one they're just gonna leave go door two three and four so this is a choke point the only way it works is if it catches everything if you bypass it and I see a lot that are badly installed it's defeats the whole purpose it's nothing this magically device that actually just needs to sense what's happening it's the only way it works is if everything has to go through it on the AC grounding wire okay and so what the install manual is gonna say and what I recommend as well is what you do so they make sure it's not bypass is you install it right after the shore power receptacle on your boat right there you that way nobody's going there there's no loads at your AC shore power receptacle if you put it in the panel people are gonna see a grounding wire and then people get creative when they see ground they're like oh this is great and then they start being MacGyver again and it's gonna give you a lot of grief and then you're gonna defeat the whole purpose of having that on your boat any questions on galvanic isolation ya know the notes so are you saying can you repeat your question again yeah this is gonna be where the end that's not the panel yeah the the a me the question is where's the ammeter located as a function of the galvanic isolator the ammeter is first of all on the hot conductor the black one on an AC system potentially could be red but for most part on most of us is black yes I know DC negative is black hence now it's yellow be very careful very careful one is death the other one is ground but the AC meter is going to be on this wire at the panel the metering always happens at the panel there's very very rarely a current transformer or anything to measure volts or amps a way AC other than the panel everything happens at the panel yeah question that does matter yeah it does it does yeah and I could do a whole presentation on galvanic like it's full-on like that is PhD like you go into the deep end it's like neutron stars like oh you want to go full-on like it's like it's crazy like like that is a world unto itself the books make for a heavy heavy reading you got to be like in the zone when you go through galvanic corrosion like it's like it's not an electrical engineer does not do got like it's way beyond that like I'm a little bit but like I'm like a little bit this works it's an easy way to implement it's not going to solve all your problems but for three four hundred dollars this is gonna solve a lot of them so it's a low-hanging fruit to put on your boat any other questions on galvanic Isolators yeah it's still gonna go but it doesn't do the DC so it's top AC goes through DC dad correct does only blocks DC current