Littelfuse FHZ busbars used in the Grenadier

TheDocAUS · Feb 12, 2024

In time I would like to see images of both busbars on the US models with the aux power option and inverter fitted. There should be one difference, at minimum, Stud 4 on the 7 Stud BB should have a cable to the inverter (and not a spare). Being a 2024 model they may also show some other changes.

TWExplor · May 25, 2024

Here are some pictures from today.

I removed the aux battery, 5 stud busbar, ctek, and related housing. I then rerouted the High Load panel wire to stud 7 as that wire had been removed with the 5 stud bb. The inverter cable is located on stud 4 of the 7 stud bb. That too will be removed for my particular build.

We will be placing a fridge in the now empty spot where the aux battery was. We will also be adding a lithium battery and components in the footwell space in front of the starter battery. More info is in the Build Thread.

LWA55DAL · Sunday at 2:37 PM

Old thread, but I am in the middle of a project to install my ARB twin compressor and I am trying to install the power lead to the compressor on the open section of the 5 Pole Littlefuse buss bar. I have found the stud and the 40 amp fuse on-line, but I am not entirely sure I know how to install the stud. Anyone swapped out the studs, changed locations, etc? Just want to make sure I am not opening up a hornets nest as I can simply wire it to the positive terminal of the battery.
Thanks

TheDocAUS · Sunday at 7:34 PM

I have changed a 40 amp to a 80 amp ZCASE MEGA fuse for my twin ARB compressor, on the 5 stud busbar.

Undo nut, replace or add the ZCASE MEGA fuse, attach compressor cable and secure the nut again. There are recommended torques settings based on the size of the bolt, see below. I cannot remember the bolt size off hand.

My compressor has been working fine for about 8 months.

screenshot-2023-09-15-05-14-32-png.7826854

TheDocAUS · Sunday at 7:44 PM

I bought a spare busbar for parts and my spares kit. So I had a spare M8 bolt to add if I needed it, and I did on the 5 stud busbar. I also had a spare bolt on the 7 stud busbar which I could have moved across.

The compressor was originally going on 7 stud busbar but the cable was a little short and I told them they could use the 5 stud busbar (at the start if neeed) which was closer the compressor unit.

LWA55DAL · Sunday at 9:42 PM

TheDocAUS said:
I bought a spare busbar for parts and my spares kit. So I had a spare M8 bolt to add if I needed it, and I did on the 5 stud busbar. I also had a spare bolt on the 7 stud busbar which I could have moved across.

The compressor was originally going on 7 stud busbar but the cable was a little short and I told them they could use the 5 stud busbar (at the start if neeed) which was closer the compressor unit.

Thanks! I think that is what I am going to have to do (buy a spare). I can’t get the 8MM stud anywhere in the US. Since I have aux battery, etc the only open spot on both buss bars if #5 on the 2nd one.

How easy was it to put in the new stud? It appears you just push out the cover on the bottom and then install the new stud and clip the bottom cover back into place? Also - I am planning to purchase a 80 amps fuse for the twin compressor (40 amps per motor), but I am getting a little confused on the size of the hole in the fuse? The fuses appear to come in multiple sizes. The one I am planning to order is 3298080.H. I think this one has the 8MM hole, but using the same part number a couple of sites show it as 6MM and another site shows it at 10MM?

LWA55DAL · Sunday at 9:46 PM

In the picture posted at the onset of this thread there is a picture of the 5 slot Busbar that looks just like mine, but it appears that the 60 amp fuse if one of the smaller 6MM types so curious if anyone know the various part number for the different size studs?
Thanks

TheDocAUS · Sunday at 11:01 PM

LWA55DAL said:
In the picture posted at the onset of this thread there is a picture of the 5 slot Busbar that looks just like mine, but it appears that the 60 amp fuse if one of the smaller 6MM types so curious if anyone know the various part number for the different size studs?
Thanks

That is the busbar from my car, as wired by the factory. I used a M8 bolt in the spare spot, from the spare busbar I bought (I bought a 5 stud because it was cheaper than a 7 stud). I was focused on ensuring the 80 amp fuse I needed to use, could take the M8 bolt. Mine is twin ARB air compressor. And that spare slot in the picture is the one I used.

TheDocAUS · Sunday at 11:09 PM

LWA55DAL said:
How easy was it to put in the new stud? It appears you just push out the cover on the bottom and then install the new stud and clip the bottom cover back into place? Also - I am planning to purchase a 80 amps fuse for the twin compressor (40 amps per motor), but I am getting a little confused on the size of the hole in the fuse? The fuses appear to come in multiple sizes. The one I am planning to order is 3298080.H. I think this one has the 8MM hole, but using the same part number a couple of sites show it as 6MM and another site shows it at 10MM?

Real easy. I just played around with the spare busbar, once I worked out how it worked it was a very simple job. I removed the M8 bolt from the spare busbar, checked the 80 amp fuse could take the M8 bolt (it can), installed the bolt into the 5 stud busbar etc I was careful not to cause any accidental shorts with any tools, from memory I used a a couple of pierces of cardboard to cover things up. My car is 2 seater where there is no plastic trim like the 5 seater.

TheDocAUS · Sunday at 11:19 PM

The spare busbar I bought only had M8 bolts. But M6 and M10 can also fit, so INEOS must have a supply deal with Littelfuse. The retail stores in Australia just have the one offering.

Someone here has used a normal bolt, the current is not going through the bolt but the fuse. I wanted the spare busbar and I knew I could use the bolts if I chose. For me it served two purposes.

Tinki · Sunday at 11:44 PM

Helo Guys , already went down this rabbit hole .

These are the part numbers :
908-066 M6 x 1.0 Thread Stud
908-067 M8 x 1.25 Thread Stud
908-068 M10 x 1.5 Thread Stud (38 mm)
Mouser used to have the M6 in stock but it seem no longer .

https://www.mouser.co.uk/ProductDetail/Littelfuse/908-066?qs=81r%252BiQLm7BSSb3%2FyPrh25A%3D%3D

https://www.mouser.co.uk/ProductDetail/Littelfuse/908-068?qs=olJun0bQHM8S29xvB1osRA%3D%3D

https://www.mouser.co.uk/ProductDetail/Littelfuse/908-067?qs=eP2BKZSCXI7%2FkBm4frJO8g%3D%3D

Best bet to get one is either buy a whole assembly , or try littlefuse directly or INEOS . To be fair they have been pretty good at getting people parts . (they have given me all i asked for)

Good luck .

LWA55DAL · Monday at 12:47 AM

Thanks guys. I was able to track down the spare part numbers on the studs from Littlefuse, but nobody has them in the US so going the route of ordering the entire 5 slot busbar so I have spare parts as well.

I have the twin ARB compressor as well and just curious if you know what 80 amp ZCASE fuse you used? I could get the one from INEOS, but that appears to be a on 6MM stud so I am guessing it will not fit the 8MM. Maybe it will, but the details on the Littlefuse site all show an 8MM hole opening.

I am also going to order some spare fuses and I want to make sure I get the correct ones. I “think” the “Starter” versions are all 10MM and the other are all 8MM, but will work with the 6MM stud? Any assistance would be greatly appreciated as I only really want to do this once.

Having looked at everything I think the correct part is 3298080.H

Thanks

TheDocAUS · Monday at 3:14 AM

I obtained mine in Australia. That does not help you. But there maybe help in the fuse thread here.

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