In 1938 there were NO SAFETY STANDARDS for electrical safety on docks or boats. SmartPlug sales have taken off dramatically and demand is high, and for good reason. I regularly measure plug temps with my infrared thermometer and also see this in the real world. To combat these issues the guys at SmartPlug came up with a floating & rotating head for their set screw design. Support for this site through my donate button (end of this article) help keep this site FREE and the in-depth brutally straight forward articles coming your way. I am playing devils advocate here, but there may be differences in the plug casings and how they transmit heat? In my experience nearly everything about the SmartPlug is extremely well thought out and constructed specifically for the marine environment. Annual inspections shall be carried out between the end of the cruising season and the beginning of cold weather, when most boats have returned to their moorings, but before they have begun to present winter heating loads to the Marina. Blatant hypocrisy? AC wiring and wiring mistakes can kill you.. All the clamping screws on the Smart Plug inlet are color coded to make it nearly fool proof. Hubbell Twist Lock, Plugs & Marine Shore Power | Fisheries Supply Be sure to ask about our Customer Loyalty Program for additional savings. Top / Locking Wiring Devices / Marine Twist Lock Plugs. One is the circa 1938 NEMA L5-30 twist-lock standard, most boaters are using today, and the other is a SmartPlug. Female connector Read on and decide for yourself. This is pretty incredible when you consider you will only ever do it once or perhaps twice at the most. Please notice that I said nearly. Add to Project List. 50 Amp 125 Volt The contact area that was scored into the sheet metal was just about the same width as a US dime.. Never being satisfied with what should be enough to show readers what I am trying to say, I pushed on. It will prevent the high resistance melt down images you have already seen so many of here and could save lives, entire marinas and boats. The argument the opponents (most likely the manufacturers who dont care about safety) propose is this: Boat owners Darrell & his other brother Darrell awake in the middle of the night to no boat power.. Darrell & Darrell find no electricity at the AC panel. , high-temperature washdowns, oil/coolant splashing, and are corrosion-resistant so they can be used in high-vibration marine environments. Be sure to ask about our Customer Loyalty Program for additional savings. As the connections age corrosion can set in and this can create high resistance, especially with the highly susceptible 1938 twist-lock standard. I then slid it back and forth thus creating a corresponding mark on the sheet metal showing the actual contact area. The robust nature of the inlet is part of the design. These plugs, in conjunction with available covers, are for use in wet enviroments. Top / Locking Wiring Devices / Marine Twist Lock Plugs. Plug Only. This allows it to have a long life and stand up in harsh marine environments. Total Contact Area = 190.4 sq mm, Twist-Lock 30A Marinco 12V or 24V Trolling Motor Twist-Lock Receptacle with Flip-Lid Cover. I have learned over the years that this is due to the clamping mechanism in the female socket weakening over time and getting loose. In this photo we are looking at the side of the 30A shore power inlet. See our major markets and building types below. Hubbell serves the needs of customers in a variety of market applications. We engineerour productsto exacting performance specifications, including CSA and MARINE UL listings for an extra margin of safety. The rubber appeared to have deteriorated in the sun. What I was told was that the exact cause cant be 100% pin pointed, and they rarely are. $28.99. Grow up! background-image: url("https://www.hubbell.com//medias/Hubbell-Marine-Products.jpg?context=bWFzdGVyfHJvb3R8MTc0MDkxfGltYWdlL2pwZWd8aDYyL2hkYS85MDAwMjQxNDYzMzI2LmpwZ3w2Yzc2ZjM0YTRhOTQwMDJhOGM3Nzg3MmY4ODhmYmQ3ODhhMzBkNDJjN2VmMWQ3MmU5OTZkZWJmN2FmN2U5MzM3"); I had previously warned him that we would want to address his aging shore connection and cord, to which he just shrugged and put it off. The same few folks (ABYC members & even instructors) & competitors of the SmartPlug arguing against the thermal-breaker in the SmartPlug 30A inlet have zero issues with auto-transfer inverters which can create the same exact Darrell & Darrell scenario they paint above, and use, to argue against the innovative and significantly safer SmartPlug.. Once such competitor actually argues out one side of their mouth against the thermal-switch then out the other sells piles & piles of auto-transfer inverters. Corrosion is a direct contributor to high resistance. Pin-Point and trace the problem it is on the tow vehicle or the trailer being towed. This essentially means that no torquing or unintended loading of the spring clamping mechanism, beyond the design criteria, can occur with the SmartPlug. This means it only has to insert but does not have to twist as well. The other reason there can be more contact area, is because the pins are flat not curved. 3-Prong, twist-lock female plug locks onto the power inlet. You also cant easily drive a standard set screw directly into finely stranded wire without fracturing it. Wholesale Marine has you covered, we carry shore power plugs and receptacles from brands such as Furrion Electrical, International Dock Products, and Marinco. Other than a yellow color, and some tinning of the socket contacts, a NEMA L5-30 is a NEMA L5-30.. Look at the pin closest to you and you can easily see the melted plastic migrating up from the base. On boats we are in a corrosive environment, that also moves. NEMA SS-2 receptacle. Here is a brief list of those different plugs and their use: - 10-30 standard 30A 240 volt 3-prong Dryer outlet found in homes built before 1996. The Smart Plug pins are flat thus measurements are far easier. Marinco stainless steel power inlets are solid cast marine-grade 316 stainless steel. The green headed screw is the grounding/Earth terminal but they all have about the same contact surface area. Problem number two find a company that can make it to SmartPlugs stringent specifications and quality standards. RV & Marine Cords - Extension Cords - The Home Depot $9.99. FACT: The only compensation Ive made from this article has been from the DONATE button in this article. Please use the latest version of one of these browsers. What jumps out to me is the substantial contact area made by the SmartPlug pin and socket. Compatible with 8AWG wire. Returns are easy and youll always receive the best customer service and advice. This is the result of just 1-2mms of movement and the dimple riding up and out of the hole in the pin.. Lets go over some of the major issues with this standard that lead to safety issues. One of the reasons the SmartPlug can have so much more metal to metal contact surface area, between the male pins and the female socket, is because this is a single-action plug. View Details. Heat is generated at points of high resistance, in an electrical circuit, when pushing current. The individual I spoke at length with was directly involved in the investigation and very confident about the eye witness and the perceived or assumed cause of this massive fire and where it originated. Hubbell AC Connector Ca STD 50a 125/250v . Hubbell is making waves in the marine devices industry with Hubbell Wiring Device-Kellems marine market products. sealing/strain relief had split where it enters the plug body. In order to make these points clearer I chose to destroy this socket by cutting it open to give a full look into why they are so dangerous. Black 12V or 24V Twist-Lock Trolling Motor Plug. High resistance is a direct contributor to boat fires! Once plugged in and locked a SmartPlug 30A or 50A male/female socket combo can not move side to side or up and down. Brilliant. One look in the cockpit, or at the boat end of the cord, saves you a trip to the dock pedestal. Not only can the clamping spring be longer but because the pin and socket are flat, or insert straight, there is a $hit load more contact area. It is very rare that a shore cord is properly supported to strain relieve the plug & socket. Once the inlet has cooled it will automatically re-set at 110F so you dont lose bilge pumps etc.. No other shore cord system, in the world, incorporates this innovative safety feature. 99 ($16.50/Foot) FREE delivery . In 1938 lead paint was the rage and asbestos was in everyday use. 120/208V. Clearly not a satisfactory situation, but not exactly what you describe. It does not take an engineer to see that the spring clamp can remain tighter, and within design spec for far longer, with the SmartPlug, than it can with a twist-lock. 3 pole , 4 wire. Product Features: I grabbed some sheet metal the same thickness as the plug pin and inserted the socket over it. Corrosion resistance and robust Marinco 30 Amp Female Shore Power Connector Here we are looking at the 30A field install/retrofit plug and a 30A inlet. Click part # below to order or call 1-800-406-8520 - Usually Ships within 24 hours . Benefits are derived from well implemented Solutions. Compatible with 50A 125/250V shore power. When I blew up the picture I realized I had been very kind to the width of the contact surface area. Made to withstand the harsh marine environment, Hubbell shore power products are some of the best in the business keeping your boat safe while plugged in. Fisheries Supply is your premier supplier of 12-volt marine plugs and sockets from trusted brands like Marinco, Blue Sea Systems, Sea-Dog Line and more. Shore Power - SmartPlug vs. 1938 - Marine How To - 14-30 standard 30A 240 volt 4-prong Dryer outlet found in homes built in 1996 and newer. Marine 12 Volt Outlets, Plugs & Sockets for Boats | Fisheries Supply Marinco Red 12V or 24V Twist-Lock Battery Charger Plug. 4.7 out of 5 stars 512. Modular connectivity. 50 Amp to 50 Amp. This mind-set & origin stems from breakers re-setting into a dead short, and I agree 150% with this. I do see such a locking ring what appears to be happening with that setup is the connector body is coming apart, with the outer shell separating from the inner part that still has a locking ring engaged. Twist-Lock EdgeConnect Plug with Spring Termination, 20A, 125/250V, L14-20P, Black and White Nylon . Locking Devices, Twist-Lock, Industrial, Female Connector Body, 50A 125/250V, 3-Pole 4-Wire Grounding, Non-NEMA, Screw Terminal, Black and White Compare View Details Threaded locking ring on the female e . Product Features: While many boats owners do improperly use these cord sets, and this too can lead to high resistance, many of them still fail and burn up even when being properly used with the locking rings properly used and installed.The failure modes are well beyond just one cause and most of it starts with the design. Back of Pin Contact = 1.3mm X 2.7mm = 3.51 sq mm 3 pole The Marinco 50 AMP Shore Power Receptacle is designed to stand up to the rigors of life on the seas and the harsh marine environment. This means approx 21A on a 30A circuit. WARNING: If you want to push beyond a 21A load on a 30A twist-lock you are doing so at your own risk. Its important to understand that I am not alone in my feelings about shore power safety. 50 Amp 125/250 Volt The tough construction and corrosion resistance provides Marinco 30 Amp Stainless Steel Shore Power Inlet Nylon body with UL flammability of 94V-0. I did not need any prompting and am only doing what 2000+ other good marine electricians should have done long ago. At least Darrell & Darrell were still alive to open the AC panel & not cooked medium rare in their sleep. DC Rated Devices; International Rated Devices; Marine Isolation Transformers; . $24.99 . 50 AMP RV Power Cord Locking Shore Connector Replacement End Marine Click part # below to order or call 1-800-406-8520 - Usually Ships within 24 hours . Read the full press release. Twist-Lock, EdgeConnect, Industrial, Insulgrip Flanged Inlet, 20A 125/250V AC, 3-Pole 4-Wire Grounding, L14-20P, Screw Terminal . Not responsible for typographic or illustrative errors. 5- There are no seals on this plug standard thus it is very easy for corrosion to set in on the pins & sockets and create yet even more resistance. You can easily see that GREEN/GROUNDING/EARTH is the bottom hole, BLACK/HOT is the right hole and NEUTRAL/WHITE is the left hole. . Stainless Steel Fasteners Once the plate is removed the inlet can be wired. He yells down to Darrell #2 Okay-dokey its safe now. Darrell #2 opens the AC panel and ZAP!!!!!!!!!!!!! 6- The socket clamping mechanism/spring clamping feature is made from material just 1mm thick.. In 1938 houses had cloth covered wire and no safety ground for 120V outlets, In 1938 GFCI outlets were not even a thought in an inventors mind. Darrell #1 goes to the dock pedestal and physically unplugs the shore power cord. The results were, well, shocking.. This is the standard used for 30A shore power on boats here in the USA and elsewhere. We make electrical products that stand up to the harshest environments. Sold by Alfateers Service Center INC. and ships from Amazon Fulfillment. Get the latest updates on new products and upcoming sales, All prices are in USD. Marinco 30 Amp Standard Shore Power Inlet There are also signs of arcing and burning on the pin itself. I cant imagine that Harvey Hubbell III ever intended this to be used on boats, inches from the ocean, back when it was conceived.. FACT: What have I received from Smart Plug? 2 pole (EDIT: 2/24/16 I have now made $245 in net reader donations on this article after paying off all the parts and pieces used or destroyed in the article.). Store Finder; . Do you by chance see an operational locking ring ? Fisheries Supply is your premier supplier of 12-volt marine plugs and sockets from trusted brands like Marinco, Blue Sea Systems, Sea-Dog Line and more. Oops, something went wrong. This can create a very dangerous situation. I paid for this socket out of my own pocket. Now if we could just get all those inverter manufacturers to Aw $hit, I give up. 1.5 ft. 10/4 4-Wire RV/Marine 50 Amp 125/250-Volt 4-Prong SS2-50P Plug to 30 Amp Twist Lock L14-30R Adapter Cord. Next, strip the outer yellow jacket back 1 1/2 inches, being careful not to nick the inner wires. Hubbell Twist-Lock Marine Grade Plugs . It should be noted that this was not the dimple side but the non-dimpled side.. Do you really want to run 30A through that? Easily Engaged Locking System. Regardless of the age or make of your craft, Wholesale Marine has the. In the shop, shooting these photos, I realized my glasses were in the house. 30Amp 3 Prong Twist Lock Plug, Oil, Water & Weather Resistant Flame Retardant, Yellow, DCOC-0136-DC. Every marine product we manufacture can face the harshest of conditions without sacrificing performance. Factory made cord sets have a blue LED in the boat end of the cord. Replacement receptacle restores shore power dockside connection for 50A amp service. Marinco 30 Amp Shore Power Locking Receptacle In Stock. This is not an accident. +2 options. This can be a critically important consideration when installed just feet from a salt water environment. Easy Lock System Product Features: This time I aligned the socket with a straight edge and moved it in and out to score another line onto the sheet metal. HBL29W78. NOTE: This is a 50A female SmartPlug inlet not the 30A version. This is the clamping screw for the AC BLACK/HOT wire. We cast off from our dock in Emeryville, CA in July of 2015. Wiring Device - Kellems is a proud member of the Hubbell family. I apologize for the tape residue but some of these pics were taken in 11F weather and the tape did not want to come off cleanly. Our Price: $ 148.75. Notice how robust the spring clamping mechanism is and the up turned guide points which make entry of the male pins seamless and easy.. I suspect a large number of the 55% of boat fires that are electrical in nature (source ABYC & USCG data) are the result of this antiquated and unsafe twist-lock standard we currently use. When not in use this gasket keeps the pins drier.. Wiring Device - Kellems is a proud member of the Hubbell family. IMPORTANT: If you are uncomfortable with AC wiring, and do not understand the differences between HOT, NEUTRAL and GROUND, please hire a competent marine electrician to do this install. Hubbell Marine makes a variety of products from Hubbell twist lock plugs & receptacles, adapters, inlets and shore power cordsets from 30 amp up to 100 amp. Abrading & Polishing; . I was then able to convince them to send me this thermal image of two brand new plugs & inlets, both 30A. The Marinco ConnectPro features a locking plug and receptacle and spring clamping connection to provide a secure electrical contact. 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This is what it looks like inside the female SmartPlug. Marine Products. In my opinion the answer is no. With this old, antiquated left over 1938 NEMA L5-30 standard there is approximately 20 times less surface contact area than there is in a modern SmartPlug. These outlet covers can come in various materials, styles and colors. I do this purposely and by design to eliminate any potential for being called a shill. SKU: 138089 | Item ID: MCO 2018BP-24. It needs to be robust to handle the marine environment and loads imposed by a moving boat. RC, you certainly tell it like it is . This was 28A in a controlled testing environment with brand new specimens. This was a major part of the design criteria for this system.. Insulgrip Twist-Lock | Locking Devices | Wiring Devices | Electrical This weakening is likely exacerbated by movement in the cord and plug as the boat moves. The Marinco 30 Amp Female Shore Power Connector is made of yellow nylon and features a ribbed design that provides a secure grip. Twist Lock Receptacle Reference Chart - StayOnline It was not good enough to just design a better plug & inlet, he wanted to design a truly safe product. Fisheries Supply offers a wide selection of high quality DC electrical products from Marinco such as the SeaLink family of 12-volt products, which include USB receptacles for charging mobile devices along with a variety of mounting brackets, plates, extension cords, and other essential 12-volt plugs and accessories. Stainless steel Marinco Replacement Interior for Boat Inlet Marine Power | etrailer.com I have far too many images of burned twist-lock plugs to show them all so I chose this one to be a good representation. Marine grade twist lock construction Do you see any locking rings on this dock pedestal? The Marinco 30 Amp Shore Power Locking Receptacle features corrosion resistant nylon construction. *Hubbell Watertight Twist-Lock Connectors are UL Listed. We also carry the complete line of Marinco trolling motor plugs and receptacles such as the new 70 AMP plug or the ConnectPro plug. Red 12V or 24V Twist-Lock Battery Charger Plug. 2 pole, 3 wire It also creates a nice wide gasket mating surface and a very solid area for the positive locking devices to lock into. Because it does not involve fine threads, twisting and the plug cant physically wiggle, once inserted, the locking mechanism actually lasts for more than a few weeks before self destructing. Unfortunately this call was in February, in Maine and the boat is stored in the water because this hearty owner sails year round. Replaces Marinco 305CRPN and Hubble Marinco ParkPower Easy Lock 30A Standard Inlet Drawing on over a century of commitment to innovation and quality, Hubbell Wiring Device-Kellems, an industry leader, is dedicated to developing and delivering marine products that improve performance, safety, and functionality. A major reason for this inspection routine is to document the condition of each boats Inlet Receptacle, the device on the boats exterior to which the shore power cord is connected, and the condition of the mating end of the cord itself. 3 pole, 4 wire The shaping of the female socket to accept the twisting results in considerably less surface area contact. It can remain in spec far longer than a twist-lock because the twist-lock allows for odd angles, twisting, unintended off center loading, torquing and expansion/stretching of the clamp mechanism all due to its left over 1938 design. REMEMBER HIGH RESISTANCE CAN CAUSE A FIRE AND NEVER TRIP A STANDARD CIRCUIT BREAKER. Single pole main breakers (hot only) are not used in the marine AC systems despite many builders doing so in the 60s 70s & 80s. The positive locking mechanism is also considerably more robust. Not too much is there? Marinco's EEL Line of Products. A feature I really do like is the LED indicator light found on the pre-made cord sets. The two mating contours needed to allow insert & twist create a very small point of final engagement. In todays day and age it is far and few between that I come across products that: I got a call from this owner one day saying his shore power cord looked charred and no surprise it certainly was. I believe in the dire seriousness of these issues 150%. You are using a web browser we don't support. Threaded . Over 20 boats and the marina were destroyed all on what is believed to be a shore power cord/inlet. This fire also turned McCotters into a SUPERFUND SITE for clean up. $32.99 $ 32. Marine GradeTwist-Lock Plugs Marinco 30 Amp Standard Shore Power Inlet, Marinco 30 Amp Stainless Steel Shore Power Inlet, Marinco 30 Amp Female Shore Power Connector, Marinco 50 Amp Female Shore Power Connector, Marinco 30 Amp Shore Power Locking Receptacle, Marinco 50 Amp Easy Lock Shore Power Inlet, Marinco 50 Amp Shore Power Female Connector, Marinco 50 AMP Easy Lock Shore Power Inlet w/ Back, Marinco 50 Amp Shore Power Male Plug 125V, Marinco Stainless Cable TV/Internet Inlet, Marinco 50 Amp 125V Shore Power Receptacle, Furrion 50 Amp 125-250V Female Connector F52FMP-SS. The crew at Sailboatowners.com (LINK) are really great. Should be simple right? In order to wire the AC shore inlet you will need to first remove the rear cover plate. These MaxxHaul testers are designed to test your wiring harness by simply plugging the tester inline between your toe vehicle and trailer, turn on your lights and check the easy to read LED indicator lights. They also prevent moisture and dust from entering the electrical box. Lets examine this further. If the connection between the cord and the boat is even slightly damaged, it will create heat that can eventually result in fire.. FACT: I personally believe in this product and SmartPlug had nothing to do with my writing of this article. Hubbell Twist-Lock Marine Grade Connectors - Locking Power Cords This 30 Amp/15 Volt contoured, square inlet is designed to provide an option to upgrade or replace Marinco Cable TV/Internet Inlet Retail: $175.00. The silver screw is your AC 120V WHITE/NEUTRAL wire. The SmartPlug makes installations as easy as it possibly can be. I very often come across twist-lock sockets where the detente or dimple & hole really dont feel as if they have meshed up or actually locked into one another.
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