12v Hub through rear anderson

Submitted: Friday, Feb 18, 2022 at 13:36
ThreadID: 143261 Views:5110 Replies:4 FollowUps:11
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Hi Everyone,

Apologies if this is covered elsewhere, but I couldn't find it!

This one is for the 12v gurus out there. I am wondering whether it is possible to use an extension lead (10m) from my rear anderson plug into what I have called a "hub" (like one of those premade control box panels) where there are numerous outlets for a campsite (usb/cig).

I take it that inside this hub would its own fusebox so the outlets are individually fused, I guess I'm just wondering whether anyone can see any issues with this setup?

I know I could just utilise a battery box but I don't really have the room for the box in the cargo area

Thanks everyone.
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Reply By: Kazza055 - Friday, Feb 18, 2022 at 14:12

Friday, Feb 18, 2022 at 14:12
I would use a fuse block at you HUB point assuming the Anderson plug already has a fuse in the engine bay.

6 Way Blade Fuse Block - Spade Terminal Connection

AnswerID: 639524

Follow Up By: lucky37 - Saturday, Feb 19, 2022 at 23:01

Saturday, Feb 19, 2022 at 23:01
Yep - for sure thank kazza
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Reply By: Greg W22 - Friday, Feb 18, 2022 at 20:34

Friday, Feb 18, 2022 at 20:34
Yes you can plug an extension into the ando. Make sure the wire size is minimum 6mm. Just make sure the supply to the ando is fused at the car battery.
AnswerID: 639532

Follow Up By: Kazza055 - Friday, Feb 18, 2022 at 20:59

Friday, Feb 18, 2022 at 20:59
Greg make no mention about running a 3 way fridge, only lights which I would assume are LEDs so 6mm is a bit of an overkill and he could get away with 1.5 or 2.5 mm.
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Follow Up By: Frank P (NSW) - Friday, Feb 18, 2022 at 21:06

Friday, Feb 18, 2022 at 21:06
Kazza, are you talking sq mm or mm diameter including insulation which is the automotive convention?

And what is hanging off the charger? A couple of USBs? Maybe more. If they are all pulling 2.5 amps, then I think you'd need 6mm quality automotive to the hub.
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Follow Up By: Greg W22 - Friday, Feb 18, 2022 at 21:47

Friday, Feb 18, 2022 at 21:47
6mm as in automotive 6mm not 6mm2.
I'm saying 6mm as the car ando will have a minimum of 6mm wired in it. And it is also better for crimping into an andersn plug.
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Follow Up By: Paul W43 - Saturday, Feb 19, 2022 at 20:28

Saturday, Feb 19, 2022 at 20:28
Should be no problem. Things to check, make sure the anderson plug is fused. You will need 6mm2 sheathed twin core., anything less and you will have too much voltage drop, or should I say current drop. Also not all hubs fuse all circuits individually, some fuse in pairs, some use a common circuit breaker.
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Follow Up By: Greg W22 - Saturday, Feb 19, 2022 at 21:37

Saturday, Feb 19, 2022 at 21:37
As has been said. If he's only running led lights and chargers then he's got a low current draw.
6mm would see no volt drop if the lead is kept short. You get current drop haha. In fact if the voltage is lower you'll get more current draw. It doesn't matter how the circuits are fused inthe hub. The fuses are to protect the wiring. And the anderson wiring only needs to be fused at the car battery.
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Follow Up By: lucky37 - Saturday, Feb 19, 2022 at 23:02

Saturday, Feb 19, 2022 at 23:02
Thanks guys - extension is an 8B&S 5m - (7.7mm2?).

2 batteries in vehicle are fused yep.
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Follow Up By: Nomadic Navara - Sunday, Feb 20, 2022 at 16:53

Sunday, Feb 20, 2022 at 16:53
Quote "6mm would see no volt drop if the lead is kept short. "

His lead is 10 metres. Is that short?
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Reply By: Croc099 - Friday, Feb 18, 2022 at 21:18

Friday, Feb 18, 2022 at 21:18
3 lights and a charger. Considering an SB50 Anderson is good for about 90A you won't have a problem as long as your cable can handle the load.
AnswerID: 639533

Reply By: qldcamper - Friday, Feb 18, 2022 at 21:27

Friday, Feb 18, 2022 at 21:27
Check that the plug on the car is actually powered with the key turned off.
AnswerID: 639534

Follow Up By: Greg W22 - Friday, Feb 18, 2022 at 21:52

Friday, Feb 18, 2022 at 21:52
In fact I wouldn't run anything for too long as you'll drain your starter battery. You'd be better off getting a battery and box with accessories fitted.
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Follow Up By: Frank P (NSW) - Friday, Feb 18, 2022 at 22:25

Friday, Feb 18, 2022 at 22:25
That is a good point, Greg. My BT50's ciggy sockets are permanently live. We have a cup-holder hub plugged into one socket. The hub has 2 x ciggy sockets and 2 x USB. In the 2 ciggy sockets in the hub we have a USB "acorn" in each, with each "acorn" having 2 x USB, so 6 x USB altogether.

We don't use all of them all of the time, but I can tell you that after a few days camping and charging 2 phones and two tablets overnight, plus sundry rechargeable torches, tent lights etc, the start battery was sluggish when we went to leave.

A small solar panel for the crank battery or an aux battery system would be a better bet.
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Follow Up By: lucky37 - Saturday, Feb 19, 2022 at 23:04

Saturday, Feb 19, 2022 at 23:04
thanks guys, the anderson plug stays on regardless of key position, theres no wiring to accessory signal. I do have dual batteries with a Traxide system that shares voltage between batteries but protects the cranking battery so no risk there.

and yeah have a 120 solar setup - not keen on a battery box for reasons above.cheers guys.
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