Power supply for electric inflator

[Observer]

I have one of these 12v inflators and want to run a power supply for it. I have a unused 24v to 12v DC converter that is rated for 10A continuous. Is that up to the job with approppriate cabling (say 17A)? The info says it has a 400W motor which suggests 33A draw but that seems too high. Other similar inflators, e.g. this one seem to be rated 10A or less.

 

[Vanilla]

I've got that Inflator on my boat and plug it into a Marinco 3 pin socket but blew the original fuse 20amp and had to uprate to a 25amp one. All fine now. Sorry can't be any more help as electrics are beyond me!

 

[DavidJ]

There is a world of difference between the two pumps. The Rule (which is a badged up LVR) is fantastic. The ampage is probably right which is why they supply with croc clips to join straight to the battery.
I wonder if LVR (I hope I've got the initials right) do a 24v pump?
Can you croc clip to half way on your 24v battery?

 

[Vanilla]

Just to clarify the pump I've got, and was referring to above, is the Rule/LVR but I got rid of the croc clips, as the batteries are in an inconvenient place which is why I plug into the cockpit "heavy duty" 12v plug instead which needed a 25amp fuse for the LVR

 

[Observer]

Can you croc clip to half way on your 24v battery?

No - or not easily. I have tested the inflator on the DC converter with croc clips and it works fine except it pops the breaker on the panel after a minute or so running. I haven't had a chance to check the breaker rating - it may be 10A or possibly only 5A. I have spares so can uprate if the cable will take a higher load.

The cable from the breaker to the DC converter is 3sq.mm, which is 27.5A. I think that's the same size as used on the lead supplied so should be okay. The cable from the converter up to the cockpit, where I want to install the socket, is 2.0sq.mm so rated for 17.5A. If the pump pulls a lot more than that I should uprate. I can do that by pulling through new cable or by doubling up but I don't want to over-engineer, particularly because it won't be a continuous load, just enough time to inflate the tender, which is probably no more than 2 mins.

 

[VicS]

The Rule (which is a badged up LVR) is fantastic. ............I wonder if LVR (I hope I've got the initials right) do a 24v pump?

LVM i think you mean. Now part of ITT along with Jabsco, Rule. Cleghorn Waring and Flojet.

See http://www.lvmshop.co.uk/

i dont see a 24 volt one but the spec says 25 amps max for the 12 volt one

They also do one rated at 13 amps http://www.lvmshop.co.uk/lvm-pumps/lvm114-lvm-whirlwind-inflator-12v.htm but I guess froim the description aimed at beach toys rather than proper dinghies etc