ARB Twin compressor air pump

**travelrover** · 10th June 2023, 11:37 AM

Hi team

Last year I bought a portable ARB twin compressor air pump and at the time the sales man told me that replacing the crocodile clamps with an Anderson plug was a simple task. A month or so ago I was looking at this in more detail and it is quite clear that the cables will not fit into the lugs on a 50 amp Anderson plug. Just too big. In reading the manual I also realized that the unit draws up to 80amps under load.

I dropped into the local ARB shop (where I bought the unit) during the week and was told it will run on the 30 amp system I have in my Defender, but I’m not so sure now and don’t want to set the thing on fire!

Has anyone manage to fit a 50amp Anderson plug and happily run the pump? Anything else I need to be aware of or other solutions?

Cheers - Simon

**Tins** · 10th June 2023, 11:56 AM

80 amps seems rather high, given the croc clips and the wire size. What is the fuse rating?

The chart below would seem to suggest that a 50 amp Anderson should be easily sufficient. However, talk to Tim ( drivesafe ) about real vs imitation Andersons.

Screenshot 2023-06-10 at 12.51.56 pm.jpg

**Tins** · 10th June 2023, 11:58 AM

Originally Posted by travelrover

and don’t want to set the thing on fire!

That's what fuses are for.

**travelrover** · 10th June 2023, 03:51 PM

The pump has two 40 amp fuses, one for each compressor, In fact one was blown when I bought the thing new.
Do you have anymore details for drive safe? There are dozens when I google it.

**Tins** · 10th June 2023, 04:09 PM

Sorry. Tim is a member and vendor on here. He usually chimes in on auto elec stuff. drivesafe is his username.

Traxide Tronics |

**rrturboD** · 10th June 2023, 06:32 PM

you will see from this link, that there are 3 different sized lugs available for the standard 50A Anderson connector. One of these will fit.
Anderson Plugs & Accessories | Connector-Tech ALs

**W&KO** · 10th June 2023, 08:09 PM

Originally Posted by travelrover

The pump has two 40 amp fuses, one for each compressor, In fact one was blown when I bought the thing new.
Do you have anymore details for drive safe? There are dozens when I google it.

The 40amp fuses are in place to protect the cable size that ARB are using, doesn’t mean the motors are pulling 80amps.

Is there a reason you want the compressor to be portable?

I opted to hard wire to the battery……had not other option given the compressor runs my air locker and rear suspension.

**Larry** · 10th June 2023, 08:51 PM

Originally Posted by W&KO

...........Is there a reason you want the compressor to be portable?.............

At a guess, because he has 3 x Defenders?

**travelrover** · 11th June 2023, 01:05 PM

Originally Posted by Larry

At a guess, because he has 3 x Defenders?

Correct!!

**prelude** · 11th June 2023, 07:00 PM

for what it's worth:

I have owned and operated dozens of UPS systems for the computing industry and one of the common models was a 1600watt unit that used 24V batteries. They were connected through a 50A Anderson connector. 1600watts at 24volts would pull 66Amps for something like 10 minutes during a power failure before either the systems were properly shut down or before the emergency generator would kick in. I have tested them extensively and the connector hardly gets warm to the touch at that current. Since you are not likely to run the system for any longer than 10 minutes? I think you can rest easy.

You do want the contacts to remain CLEAN to make sure you do not have unneeded resistance and with that voltage drop over the connector at such currents though since that will heat thing up very quickly!

Cheers,
-P

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