{"product_id":"4-post-m10-heavy-duty-48v-600-amp-bus-bar","title":"M10 4 Post Heavy Duty 48V 600 Amp Bus Bar","description":"\u003ch5 style=\"text-align: center; font-size: 1.9em;\"\u003e\u003cspan style=\"color: #00AAFF;\"\u003eOne clean landing point for four heavy cables.\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp\u003eEvery 48V build reaches the same moment. The controller, the inverter, the battery bank and a couple of loads all want to meet in one place, so they end up stacked on a battery post — three lugs under one nut, none of them torqued properly. It works until a corrugated road shakes one loose. Then you are on your back under the canopy with a torch, chasing a joint that has gone warm.\u003c\/p\u003e\n\u003cp\u003eThis is a four-post bus bar with M10 studs, rated by the supplier at 600A continuous DC, under a removable fire-resistant nylon cover. Four heavy cables land on their own stud, each one torqued to a stated figure, with the cover back on so a dropped spanner cannot bridge two of them.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBefore you order — you get ONE bus bar, not two.\u003c\/strong\u003e The supplier's own packaging photographs read \u003cem\u003e1PCS RED\u003c\/em\u003e and \u003cem\u003e1PCS BLACK\u003c\/em\u003e, and the colour dropdown on this page is a choice between the two, not a set. If you want a positive and a negative, put two in the cart: one red, one black. The word \"pair\" in this page's web address is left over from an older listing and it is wrong. The 400A and 500A bus bars in our range do ship as positive-and-negative sets — this one does not.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThis is a 48V DC product.\u003c\/strong\u003e BushLine stocks 48V bus bars on purpose — the cheap 12V and 24V blocks are easy to find anywhere and we do not sell them.\u003c\/p\u003e\n\u003ch5 style=\"text-align: center;\"\u003eWhat It Solves\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan style=\"color: #7FD4FF;\"\u003eNo more stacked lugs on a battery post:\u003c\/span\u003e\u003c\/strong\u003e three heavy cables under one nut is how you get a hot joint. Land them here and the battery post carries one clean connection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan style=\"color: #7FD4FF;\"\u003eA torque figure you can work to:\u003c\/span\u003e\u003c\/strong\u003e the supplier states 15.8 Nm on the studs, so you can set a wrench instead of guessing and stripping an M10 thread.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan style=\"color: #7FD4FF;\"\u003eNothing shorts across the studs:\u003c\/span\u003e\u003c\/strong\u003e the cover clips over the terminals, which matters in a battery box or an engine bay where tools get put down in odd places.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan style=\"color: #7FD4FF;\"\u003eFind a fault in minutes:\u003c\/span\u003e\u003c\/strong\u003e when every heavy cable meets in one place you lift a cover and look, instead of tracing wire through a canopy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan style=\"color: #7FD4FF;\"\u003eRoom for the load you add next:\u003c\/span\u003e\u003c\/strong\u003e four posts means the next inverter or winch circuit has somewhere to go without rebuilding the run.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5 style=\"text-align: center;\"\u003eKey Features\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan style=\"color: #7FD4FF;\"\u003e600A continuous DC:\u003c\/span\u003e\u003c\/strong\u003e the supplier's rating. Read the honest note on conductor thickness in the Q \u0026amp; A before you size a system around it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan style=\"color: #7FD4FF;\"\u003eFour M10 studs:\u003c\/span\u003e\u003c\/strong\u003e on 31 mm centres, so four heavy ring lugs sit side by side without fouling each other.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan style=\"color: #7FD4FF;\"\u003eStud torque stated:\u003c\/span\u003e\u003c\/strong\u003e 15.8 Nm. Over-tightening an M10 stud on a bus bar is a real way to ruin one.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan style=\"color: #7FD4FF;\"\u003eNickel-plated copper studs:\u003c\/span\u003e\u003c\/strong\u003e supplier stated. Plating is what keeps a joint from going green and then going hot.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan style=\"color: #7FD4FF;\"\u003eFire-resistant nylon base and cover:\u003c\/span\u003e\u003c\/strong\u003e supplier stated. No flammability class is published, so we do not quote one.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan style=\"color: #7FD4FF;\"\u003eRemovable cover:\u003c\/span\u003e\u003c\/strong\u003e moulded cut-outs let the cables out the front while the terminals stay covered.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan style=\"color: #7FD4FF;\"\u003eCompact footprint:\u003c\/span\u003e\u003c\/strong\u003e 178 x 51 mm base, 50 mm tall, so it fits a battery box lid or a bulkhead.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan style=\"color: #7FD4FF;\"\u003eMounting screws in the box:\u003c\/span\u003e\u003c\/strong\u003e ten self-tapping screws are shown supplied with each unit, four base holes to fix it down.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan style=\"color: #7FD4FF;\"\u003eRed or black:\u003c\/span\u003e\u003c\/strong\u003e pick the colour that matches the side you are wiring — one unit per order.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5 style=\"text-align: center;\"\u003e\u003cspan style=\"color: #00AAFF;\"\u003eWhat Else You'll Need\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp\u003eA bus bar distributes power. It does not protect anything, and on its own it is half a job. Here is what usually goes around it:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"https:\/\/bushline.com.au\/products\/circuit-breaker-manual-reset-12v-48v\" style=\"color: #7FD4FF; text-decoration: underline;\"\u003eManual reset circuit breakers, 20A to 300A:\u003c\/a\u003e\u003c\/strong\u003e every circuit landing on the bar wants its own protection. The bar will happily pass more current than your cable can carry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"https:\/\/bushline.com.au\/products\/12v-48v-100a-300a-isolator-disconnect-rotary-switch-cut\" style=\"color: #7FD4FF; text-decoration: underline;\"\u003eBattery isolator switch:\u003c\/a\u003e\u003c\/strong\u003e so you can kill the whole bank before you put a spanner anywhere near a live stud.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"https:\/\/bushline.com.au\/products\/pure-copper-electrical-terminal-connectors\" style=\"color: #7FD4FF; text-decoration: underline;\"\u003eCopper ring lug terminals:\u003c\/a\u003e\u003c\/strong\u003e the studs take standard M10 ring lugs. Buy the lug to suit your cable, not the other way round.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"https:\/\/bushline.com.au\/products\/6-50mm-battery-cable-lug-crimping-tool-terminal-crimper\" style=\"color: #7FD4FF; text-decoration: underline;\"\u003eCable lug crimping tool, 6-50 mm²:\u003c\/a\u003e\u003c\/strong\u003e a crimp done with pliers is a joint that heats up. On 600A gear that is not a corner to cut.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"https:\/\/bushline.com.au\/products\/2pcs-anderson-plug-3pin-50a-75a-175a\" style=\"color: #7FD4FF; text-decoration: underline;\"\u003e3-pin Anderson plugs:\u003c\/a\u003e\u003c\/strong\u003e so you can unplug a turbine and drop it for maintenance, or pull the whole setup off the van, without cutting anything.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"https:\/\/bushline.com.au\/collections\/wind-turbine-electrical-supplies\" style=\"color: #7FD4FF; text-decoration: underline;\"\u003eThe rest of the electrical range:\u003c\/a\u003e\u003c\/strong\u003e cable, isolators, junction boxes, meters and the other two bus bars.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"https:\/\/bushline.com.au\/collections\/wind-turbine-controllers\" style=\"color: #7FD4FF; text-decoration: underline;\"\u003eHybrid MPPT controllers:\u003c\/a\u003e\u003c\/strong\u003e you cannot wire a turbine straight to a battery. The controller rectifies the output, manages the charge and brakes the turbine when the bank is full.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"https:\/\/bushline.com.au\/collections\/wind-turbine-power-vertical-axis\" style=\"color: #7FD4FF; text-decoration: underline;\"\u003eVertical axis wind turbines:\u003c\/a\u003e\u003c\/strong\u003e if this bus bar is going into a new off-grid build, this is the gear that charges the bank overnight when the solar cannot.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhat we do not cover for you:\u003c\/strong\u003e cable sizing. It depends on your run length, your voltage and your actual current draw, and nobody can size it for you from a product page. Work it out against your own run or ask your sparky. If you are building 12V or 24V rather than 48V, the sizing changes again and this is not the bus bar we would point you at.\u003c\/p\u003e\n\u003cp\u003eTechnical electrical equipment — turbines, controllers and distribution gear like this — should be installed by a qualified person. Keep the electrician's invoice: our returns position on electrical goods asks for proof of professional installation.\u003c\/p\u003e\n\u003ch4 style=\"text-align: center;\"\u003eQ \u0026amp; A\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #5EDD5B;\"\u003eDo I get one bus bar or two?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\nOne. The supplier's packaging images say \u003cem\u003e1PCS RED\u003c\/em\u003e and \u003cem\u003e1PCS BLACK\u003c\/em\u003e, and the only option on this page is that colour choice. Order two if you need a positive and a negative. We know the web address says \"pair\" — it is an old handle and it is wrong.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #5EDD5B;\"\u003eWhat torque do the M10 studs take?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\nThe supplier states 15.8 Nm. Work to that. A bus bar stud that has been leaned on with a long spanner either strips or distorts the bar, and neither shows up until the joint gets hot under load.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #5EDD5B;\"\u003eThe studs are marked M10 and also 3\/8-16. Which is it?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\nBoth markings appear on the supplier's own drawing, and they are not the same thread — 3\/8 inch is 9.5 mm, M10 is 10 mm. The store sells it as M10 and the option list says M10. Either will pass through a 10 mm ring lug hole, so for lugs it makes no practical difference. If you intend to run your own nut onto a stud, check the thread on arrival before you buy hardware for it.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #5EDD5B;\"\u003eHow thick is the conductor bar, and is 600A real?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\nNot specified by supplier. That is the honest answer and it matters, because conductor cross-section is what actually sets a current rating — not the number printed on the box. 600A continuous DC is the supplier's figure and we have not seen a conductor size behind it. Our 400A bus bar publishes 8 mm tinned copper and the 500A publishes 6 mm pure copper; this one publishes nothing. Size your system on your cable and your breakers, and treat the 600A as headroom rather than a design limit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #5EDD5B;\"\u003eThe supplier's drawing also shows AC figures. Do they apply?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\nThe drawing prints 300V AC and 545A AC alongside the DC ratings. We sell and rate this as a 48V DC part and no certificate has been sighted for the AC figures. If you need a mains-voltage AC rating, this is not the part.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #5EDD5B;\"\u003eCan I use it on a 12V or 24V system?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\nElectrically it will work below its rating, so nothing stops you. But we stock 48V bus bars deliberately — the cheap 12V and 24V blocks are available anywhere and this is priced as a 48V part. If you are building 12V, buy accordingly and check your cable sizing for that voltage, because the currents are much higher for the same power.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #5EDD5B;\"\u003eDoes it come with a fuse or breaker, and is it waterproof?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\nNo to both. A bus bar distributes, it does not protect — you still need a breaker or isolator on each circuit and a main battery breaker. No ingress rating is specified by supplier. The cover keeps fingers, spanners and falling debris off the terminals; do not treat it as sealed, and do not mount it where it will sit in water.\u003c\/p\u003e\n\u003ch4 style=\"text-align: center;\"\u003eSpecs\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC power distribution bus bar, four post\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSupplied as\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eONE bus bar per order\u003c\/strong\u003e — red or black, chosen at checkout. Not a positive-and-negative pair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax continuous current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e600A DC (supplier stated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSystem voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e48V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAC figures on the supplier drawing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e300V AC \/ 545A AC also printed. Sold and rated here as a 48V DC part — no certificate sighted for the AC figures\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTerminal studs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 x M10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStud thread marking\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSupplier drawing prints both \"M10\" and \"3\/8-16\" (9.5 mm). Check the thread before buying loose nuts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStud spacing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e31 mm between centres\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStud torque\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15.8 Nm (supplier stated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStud material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNickel-plated copper (supplier stated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConductor bar material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNot specified by supplier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConductor thickness \/ cross-section\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNot specified by supplier — this is what sets a real current rating, so treat the 600A figure accordingly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConductor plating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNot specified by supplier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCable size compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNot specified by supplier — set by the M10 ring lug that fits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBase and cover material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFire-resistant nylon (supplier stated). No flammability class specified by supplier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCover\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRemovable, with moulded cable cut-outs over the studs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBase footprint\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e178 x 51 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCover length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e182 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOverall height\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBase thickness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e17 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFour base holes; ten self-tapping screws shown supplied with each unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAuxiliary screw terminals\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSmall screw terminals sit at the ends of the bar. Count and rating not specified by supplier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColours\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRed or black — one colour per order\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIngress rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNot specified by supplier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNot specified by supplier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCircuit protection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNone included — fit your own breakers and isolators\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e48V off-grid solar and wind, battery banks, marine, RV, truck, 4x4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4 style=\"text-align: center;\"\u003eWatch Me\u003c\/h4\u003e\n\u003cp\u003eNo video on this one. If you are wiring an off-grid system, these two guides cover the sequence and the hazards:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/bushline.com.au\/pages\/how-to-install-start-wind-turbine\" style=\"color: #7FD4FF; text-decoration: underline;\"\u003eHow to install and start up a wind turbine\u003c\/a\u003e — the correct order of connection, and the two shock hazards to know first.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/bushline.com.au\/pages\/wind-turbine-showing-0w-while-spinning\" style=\"color: #7FD4FF; text-decoration: underline;\"\u003eWind turbine spinning but showing 0W\u003c\/a\u003e — nearly always wiring or setup rather than faulty gear.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BushLine","offers":[{"title":"M10-Red","offer_id":42335406030914,"sku":"14:173#M10-Red","price":85.0,"currency_code":"AUD","in_stock":true},{"title":"M10-Black","offer_id":42335406063682,"sku":"14:10#M10-Black","price":85.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0034\/1655\/5590\/files\/M10-4-Post-Heavy-Duty-24V-600-Amp-Bus-Bar-26519121559618.webp?v=1769583149","url":"https:\/\/bushline.com.au\/products\/4-post-m10-heavy-duty-48v-600-amp-bus-bar","provider":"BushLine Outdoor Equipment","version":"1.0","type":"link"}