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Well, they are pushing the limit to what can be acheived before unacceptable damage to the contacts. Not many of these small switches have DC23A ratings which is what personally I would use on anything I have, DC22B at a push. I think the key here is the contacts in any switch in any...

Hi, We use ABB OT and OS series and also Schneider INS/INV for just what you are asking for. Hager also so some MCB's that are DC rated and keep it will hidden, although I'm not keen on using mcb's for disconnecting DC side of a sizeable install. Switch disconnectors are what the post was...

Again, Like I said, I see a lot of people across the internet installing "Emergency cutoff switches" on the assumption it will prevent their RV from going up in flames if there is a fault, that is just an example. Just making a point for less experieced users making assumptions.

Read first and watch after. I see a lot of people installing "Switch Disconnectors" for DC Lithium Installs thinking that it can be operated when everything goes wrong to stop the fire, explosion or whatever they imagine would happen (this is not a single 70ah LA car battery anymore). The...

Continued:- 2.2.5 System Earthing (d.c. Conductor Earthing) There are a variety of possible PV array system d.c. earthing scenarios which can be broadly summarised as follows: No earth connection• Hardwired connection of positive or negative conductor to earth• Centre tapped array – with /...

For Land based PV installs:- A connection to earth of any of the current carrying d.c. conductors is not recommended. However, earthing of one of the live conductors of the d.c. side is permitted, if there is at least simple separation between the a.c. and the d.c. side. Where a functional...

I am looking for DC21, DC22 and DC23 data on Merling Gerin MGI1604 Switch Disconnector. The later indentical Interpact range have deratings for DC. The switches are identical to the older Merlin Gerin with addition of a newer branding. Before anyone states the DC ratings will be written on the...

This is only Vented Lead Acid. Lithium would be interesting. BS EN 50272-1 2010 ‘Safety requirements for secondary batteries and battery installations’. Items which could produce sparks (e.g. manual disconnects, fuses, relays) should not be positioned within a battery box or directly above one...

100% more chineesium still.

This is my whole point exactly. Just buy the mechanical adjustable dieless crimpers second hand. They are made with the correct tolerances, certified when made and then certified again anually by the company/contractor who uses them . They give CONSISTANT crimping force compared to cheap chinese...

they forgot the masking tape for better insulation!

With reference to my earlier post linking the publications regarding Hex crimps not being gas tight. Here is a 2AWG cable which is a (nats knacker 0.5mm) under 35mm size metric cable inserted into a metric 35mm hex lug. Crimped using a 25mm hex hydraulic chineesium cimping tool. The wings are...

Personally I think those hose clips are way over the top and should be much thinner.

Crimp, Weld then solder!

The FTZ look really nice, but is $80 for 25 lugs and then $135 shipping to Europe.

Imagine if this goes viral, and everyone in the world goes out to their install and starts pulling cables out of lugs. Installers will be bankrupt on warranty callouts and there will be lots of barking dogs.

Jim, Did you hang your dog from it? Tow your car with it? It needs sufficient pull force! Then you need to get 4 arc welders and create a sufficient current draw and test for hotspots using a thermal camera!!:ROFLMAO: :LOL:

The true test!

The dies in the Hex are all metric, lugs were also metric over here in UK.

Absolutley and to be honest my whole system was designed around 24KWh batteries with 6 MPPT victrons for low current and VDC loss and Multiplus II, with all arrays in series of only 2 panels per string even though the strings are next to each other. Full granualar control of all the 12 PV...

Yes, I was a bit impatient and a grinding wheel is the worst choice. Regarding the Hex crimp being gas tight is not correct from the papers I have read. In reality it probably doesn't matter as your not running in the KA or KV DC teritory. Further reading on the link in previous post which...

UK, funny actually as we used to have a lot of AWG up until about 15 years ago and then it all filtered out into Metric. I tried crimping AWG2 on 35mm lugs with the HEX crimper and it looked fine until I hung my dog from it and it came off. On a serious note yes the correct lugs make a...

https://diysolarforum.com/threads/elcheapo-hydraulic-hex-crimper-results-as-expected-stick-to-burndy-mechanical-indent-crimps-eh-giggles.38790/ My results posted above from cheap hydraulic hex crimping tool vs Burndy Mechanical My29-11. Lot's of documentation floating around on the net for...

Results using Genuine $840 Burndy MY29-11 dieless mechanical crimping tool. "The complete compression of wire strands using a hexagonal crimp and standard crimping dies is not possible. This means standard hexagonal crimps are not gas-tight (see gas-tight oval crimps at the end of this...

Thanks for the detailed reply. I have gone with the more expensive lugs which are from an iso9001 registered company and the lugs confirm to various BS (british standard codes). Just by gripping and moving the lug around on the crimp performed with the Burndys the connection feels absolutley...

Just used my new Burndy crimpers and although they are stupid money you can tell the difference. It is night and day between the chineesiums and the proper calibrated ones. These are 4kg and 600m long, not the sort of things you carry around in your pocket, but they are effortless. The...

Little V=tingle Big V=wet your pants Little A=feel a bit stiff Big A=MR toasty I suppose on this basis W=a combination of : - tingle, wet your pants, feel a bit stiff and MR toasty in various degrees.

Calling all Copper Lug Guru's - which lug would you choose and why? I have ordered from 2 suppliers. 1 is an electrical supplier and the other specialise in DC cable and Forklifts, HGV and all the big Automotive stuff. The shorter lugs on the left are from the DC cable and big stuff guys and...

Elcheapo Hydraulic Hex crimper results, as expected...stick to Burndy mechanical indent crimps eh! https://prnt.sc/exkhLIeFxxnm $50 Amazon hydraulic crimpers. Metric 35mm copper lug Be stamped. 35mm copper 1500VDC cable. Cut carefully with a dremel grinding wheel. Was a bit eager in the...

Yeh your right, we need 8K footage! or I could always fuse my golf clubs!

How many volts and how many currents is all I ever cared about, nothing else matters really.:ROFLMAO:

Well with 16 Dual purpose deep cycle 130a/12V SLA Calcium batteries in 4 strings running the worst designed 48V system ever that could well happen with a mislaid wrench!! or a golf club!

I'm thinking of leaving a 2mm gap between the lug and the jacket so I can see my sparkly new copper. Maybe put a disco ball in the garage to shine some sparkly colours on it through the clear heatshrink!!:cool: :eek:

I'm liking the idea of clear heatshrink on all my cimped lugs! Your Opinions Please..... I think I am going to go for all black 35mm cable with clear heatshrink/adhesive on all crimp lugs, with a cheeky slither of RED heatshrink just before the clear for identifying my positives. I'm liking...