Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
Thanks
So say a 350 for the 13500?
And say 50amp for the 500kg?Disco 3 SE Manual 2005 V6 2.7
Buckley, North Wales
18th May 2021 8:14 am
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10366
I would think you would need something at least around 200 or 250A if its chunky cable
But I dunno
18th May 2021 10:41 am
aja4x4
Member Since: 14 Apr 2019
Location: Westbury
Posts: 2459
cmb2020 wrote:
Thanks
I’m just struggling to understand what amp fuses I know you’ve explained but I’m struggling to follow how to calculate. As stupid as I’m sounding.
So I’d want a 450 for the 13500 winch yes?
And for the smaller 500kg unbranded one, 350?
If not could you be kind enough to tell me the answer instead of explaining how to calculate as I’m having a thick moment sorry again
The fuses are not to protect the Winch's they are to protect the cable from burning out and setting things alight.
The fuses have to be a high enough rating to handle the highest demand without blowing but they must blow before they start to burn out.
The front cable is shorter and can handle higher power for longer than the one going to the rear due to internal resistance.
You can put lower rates fuses in but you risk them blowing when there is a high demand on the winch, this could put you into a dangerous situation if the pole you are trying to effect is half off the ground swaying in the wind.Andrew
D3 2.7tdv6 2005
D4 3.0 SDV6 Commercial died and gone to LR heaven
D5 3.0 SDV6 HSE
18th May 2021 10:41 am
cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
I’ve been all over the net today and called rhino but to no conclusion
Can someone just tell me the amp needed for (a) front one and (b) back
350 for front yes?
Rear one is 5m of 35mm2 cable to Anderson then 5m of 10mm2 from trailer to craneDisco 3 SE Manual 2005 V6 2.7
Buckley, North Wales
18th May 2021 1:02 pm
cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
Sorry and reading back on this now it’s making sense! Cranked my neck days ago and the pains been distracting me from learning is my excuse.
Im going for lower rating fuses to start but having a pack of different ones to work up if needed!
Basically get a fuse that is half the rating of the cable and winch. So if the setup overloads, the fuse goes before the wire etc
I’m about to buy conduit now for the wiring too.
Thanks againDisco 3 SE Manual 2005 V6 2.7
Buckley, North Wales
19th May 2021 9:38 pm
cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
Hi all
For the trailer wiring, should I run 35mm2 for live and earth from hitch to crane winch directly....
Or should I run live from hitch to winch crane. And earth the winch crane to the trailer? Or does it need a solid run for earth from car to crane winch please?
So far run 35mm2 in conduit from battery. With a 600amp kill switch. And a 400amp Anderson plug at tow bar. With a 25mm2 length for earth to chassis.
Wondering do I buy 10m of 35mm2 for live and earth. Or say 6m and earth the winch to trailer frame.
Both winches have a 600 amp kill switch now. Fuses and box will added when they arrive
ThanksDisco 3 SE Manual 2005 V6 2.7
Buckley, North Wales
23rd May 2021 4:35 pm
aja4x4
Member Since: 14 Apr 2019
Location: Westbury
Posts: 2459
Run both positive and negative from your aderson plug straight to the winch, you cand rely on the trailer earthing on the towballAndrew
D3 2.7tdv6 2005
D4 3.0 SDV6 Commercial died and gone to LR heaven
D5 3.0 SDV6 HSE
23rd May 2021 4:39 pm
cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
Will do thanks
Will do a video once it’s complete tooDisco 3 SE Manual 2005 V6 2.7
Buckley, North Wales
23rd May 2021 4:41 pm
Lightwater
Member Since: 22 Oct 2018
Location: Sydney NB
Posts: 96
Have you calculated wire resistance. In some earlier posts. There are figures of 400amps. Also a 5 metre run.
400amps 5 metres one way 2/0 recommend, double the resistance for + & - ie 10 metres.
Click image to enlarge
If you want to keep the resistance to the same loss as 5 metres, double the cross sectional area for 10 metres.Visitor - Freelander owner
24th May 2021 4:43 am
cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
Hi there’s a 5m run of 35mm2 (battery to tow bar). With an 400 amp max Anderson plug.
I have now bolted the jib crane to the left side above the axles. Instead of at the tail of the trailer. As there’s a more secure area to bolt on to. And a slide out leg fits there to add stability.
There is now 4m length of 35mm2 live and again earth from hitch to jib crane.
The power wiring goes to the remote and then to the crane winch. See image.
So presuming I will rewire the remote with 35mm2?
Question:
What do you mean by double up? So run 10m regardless of only needing 4?
The quality of installing so far I think is great. But my understanding of rating and charts I’m struggling now with this new information.
The jib crane I think is 90amps to stall. Wiring is 900amps to stall (9m total of live and 4m total of earth)
Anderson is 400 amps
Kill switch is 600 amps
I’ve got 100, 350 and 450 amp mega fuses in post today to fit.
Saying that, the additional remote wiring would be another 2-3M of 35mm2
I presume I’m almost wired in and ready. I’ll send a few images now for understanding
Disco 3 SE Manual 2005 V6 2.7
Buckley, North Wales
the 400A draw should only be present very briefly at start-up and then in the case of a stall ... which you would hopefully recognise and kill the power.
Once it's all wired up you can use the 100A fuses to just test that it's wired correctly with no silly shorts. wear gloves when plugging it into the circuit in case it does blow.
once it's passed that check, plug in the real fuses..
Dean
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24th May 2021 1:14 pm
Lightwater
Member Since: 22 Oct 2018
Location: Sydney NB
Posts: 96
There are plenty of DC calculators online.
The calcs are for 5 metres. If you are using a positive & negative wire (not earth return), you need to calculate for the total length of the wire, both positive & negative which will be 10 metres.
So the resistance will double.
Or if you do not want the resistance to double due to 10 metres. Double the cross sectional area of the wire.
Taking this further, if your current is not 400amps, but is only 200amps. Then the resistance will be half.
So 200amps over 10 metres has the same resistance as 400amps over 5 metres.
You really need to decide what percentage of the performance of the winch you are prepared to throw out the window in wire resistance.
Personally around 4% loss would be my limit.
A heat gun works a treat to solder heavy Anderson lugs.
Visitor - Freelander owner
24th May 2021 2:19 pm
cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
I didn’t hear my lugs up. They were a bit too narrow for the cable, so I trimmed a few strands off to get it in tight.. then crushed the lug flat in a vice. Then wrapped insulation tape around the end of the cable sheath.
The winch needs to lift 300kg up 4 foot high. Hold it for 30 seconds. Then lower it down to trailer bed. Done up to 5 times total, per use.
It is to load marquee roof panels in bags. Each one is 300kg in a bag. Most the time it will be 2/3 panels. But now and then will be all 5 for the big jobs.
They don’t need to move far. And I can lock the crane top to the bag with a clip on chain if needed.
Basically line the bags up aside the trailer. Lift them up with the arm aiming up 45degrees. Swivel over the trailer. Lower and wiggle in to position. Sheet over and ratchet down.
The winch is 500kg max. I think 90 amps max to stall. It’s never stalled before connected directly to a Navara battery picking up the bags. Then lowering to the Navara bed and moving to the trailer.
Obviously now my car isn’t a flat bed and it’s not worth making a fixture to the car. I need the crane to be on the trailer with a safe and properly done set up installed. And i will stick with it.
After requiring the control remote lead it will be 11 meters total, just of cable on the trailer. Then 5m in car. So 16m total of 35mm2
Disco 3 SE Manual 2005 V6 2.7
Buckley, North Wales
24th May 2021 2:57 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10366
I'm not sure I get this talk of remote wiring.
Is it to
1) enable the motor for safety ?
or
2) The up and down control. In which case you would have it say at the towbar or at the winch.
Aren't these cables usually fairly thin ? Dunno
EDIT : Oh that yellow thing is the controller. With thick wires as its switching the load
24th May 2021 3:03 pm
cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
Attached more images
It’s an up / down remote. I think fitting 35mm2 lugs will need washers on the yellow remote to hold them in place.
The Anderson power plug goes to cable, to remote, to a longer cable, to winch:
Disco 3 SE Manual 2005 V6 2.7
Buckley, North Wales
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