Conversion wires

marksmithuk

Senior Member
T6 Pro
quick question. I know I'll need to do the maths to make sure on the bigger stuff, but I'm planning on using 2.5mm cable for all my 12v lights, USB sockets etc.

Would that do the job ?
 
Depends on how many lights.?

How long are the cable runs?

How many and what amp rate of USB chargers (some QC3 can draw 5A each)

So 2.5mm will be ok provided its fused correctly.

@travelvolts - any advice ?


Support our trade Members :
(@travelvolts) Electrics | Travelvolts

.
 
It'll only be a bank of 6 LED spot lights on one circuit, a strip led light on another and 3 USB on another with 2m max cable runs so hoping 2.5mm is over kill to be honest
 
1. 5mm more than sufficient for led lighting and usb sockets. I might consider 2.5mm for 12v sockets if used heavily.

1.5mm should do 16amps and 2.5mm 25amps from memory.

Voltage drop unlikely to be an issue certainly on the lighting.
 
Thanks :) sounds like 2.5mm is slight over kill and 1.5mm would be spot on. For the slight additional cost I'll go 2.5mm :)
 
id still keep the 2.5mm cable. . . . its always better to have a larger cable (cost&weight permitting)

due to lower cables resistance and possible heating under loads.

Plus the option of adding more kit onto the run or spur`ing off it at a future date will save you having to uprate the cable...
 
:) sounds like I do know more about it than I thought as that was my exact logic in my head.. wahoo!

Just need to get my kit ordered now...

Whilst on the subject of the electrics ... what are your thoughts on

CTek D250 b2b
2x 110 Ah batteries
Victron 12/375 inverter
Victron ip65/15 charger
Victron BMV 712 monitor

That's my basic plan for everything
 
LOL . . . all that kit looks good. (maybe look at adding solar at a later date, mobile panels so you can throw them out when you need them)

you can get all that kit here :

Support our trade Members : (@travelvolts) Electrics | Travelvolts

also have a look at my kit list here:

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Dellmassive`s -- "how I Done It" -- Thread
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Kit List And Stuff -- How I Done It & What I Use --
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and more info on the above here :



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POWER:

Ignition Live Under Passenger Seat - How Its Done -
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Installing 12v Socket /s - How Its Done -
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12v Igntn Feed + 5xusb Charging From Ign Feed - Today's Install
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12v Aux Feed + 5xusb Charging From Aux Battery - Today's Install
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Battery Chargers - How I Did It -
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Which Jump Starter?
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Lithium Lifepo4 12v Batteries - - - Time For An Upgrade ? - - -
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Battery Charging - Main Battery Earth Point -
.
Dc-dc Charger (for Leisure Battery) -- How I Done It --
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Stop/start...regen...smart Alternator... Dc-dc Charger For Leisure Battery Or Not?
.
Full Van Ecu Reset (capacitive Discharge) -- How I Done It --
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Battery Monitoring -- How I Done It --
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Diagrams, Schematics & Wires -- How I Done It --

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and here:


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SOLAR:

Solar Pwm & Mppt Controllers - How I Done It -
.
Mobile Solar Panels ? . . . - How I Did It -
.
What Solar Panel & Controller ?
.
Solar Panel Cutting Hole In Roof !!!
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300w Solar Club -- How I Done It --
.

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Just a quick note on my recent experiences as a van wiring novice. There is a useful cable size calculator on 12VoltPlanet.
@travelvolts web advice and help on the forum was really helpful and I feel guilty that I didn't in the end buy anything from him.
@Dellmassive has also been really helpful and his links have loads of good information in them.
I specified 1.5mm for lights and low loads with 2.5mm for high loads like 12v sockets and used 4mm for the fridge feed to ensure it is as efficient as possible.
All the cables were twin core and earthed back to the fusebox (mostly) which should also ensure as little loss as possible. The problem is running the cables though the van and I had trouble with loom sizes as it is a twin slider. It went OK just but is worth planning out. If you also fit mains cable for EHU it also has to fit in.
I went for a 100ah Lithium battery for a number of reasons despite the cost. It weighs a hell of a lot less than two AGM 110ah will and it fits under the passenger seat with the fusebox and Renogy DC-DC. The weight may turn out to be more important than you think depending on your van spec. Mine is a T32 but with 4Motion and extras I am keen to get as much payload as possible. Just a few extra things to consider.
 
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