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Old 06-24-2010, 12:05 AM   #1
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Braun wheelchair lift wiring

I'm in the process of installing a braun millenium lift that I picked up at a local auction into my shortbus. I have it mounted and have tested it out manually with the hand pump a couple of times and it seems to work fine. So, I'm on to the next step of wiring it up.

I want to size the positive cable and circuit protection. I was wondering if anyone who has one or pulled one out of their bus can tell me what the amp draw for the lift might be? I don't see any info on the lift itself (I could be just blind too) and I can't seem to find much info on the web about electrical requirements for one of these.

I did find some diagrams that mentioned using Brauns "circuit sentry(?)" close to the battery, but they don't say the amp rating of the breaker.

Thanks for any help.
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Old 06-24-2010, 03:13 PM   #2
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Re: Braun wheelchair lift wiring

any wheel chair lifts i have seen that are electric have cables going to them about the size of the negative cable directly off the battery all the way to the lift.
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Old 06-25-2010, 01:31 PM   #3
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Re: Braun wheelchair lift wiring

I recently removed my lift and I can tell you the cable was huge. Definitely at least the size of a battery cable if not bigger. I'm not sure how far you are running to get to the battery, but mine is like 20 feet away.
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Old 06-25-2010, 06:16 PM   #4
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Re: Braun wheelchair lift wiring

Thanks for the responses.

Quote:
Originally Posted by Smitty
Got a clamp-on DC ammeter ?

Smitty
unfortunately I don't have a clamp-on ammeter. I'll have to bum one and try the lift to get an idea.
If I were to put a decent load on it and run it with the ammeter, that amperage reading should give me the approximate circuit breaker and wire size to use?

Quote:
I recently removed my lift and I can tell you the cable was huge. Definitely at least the size of a battery cable if not bigger.
The cable that was left on the lift was huge. That is what made me wonder what kind of amperage the lift is drawing.
I'm mounting it in the side door right behind the front door so if I were to run wire from the battery it won't be that far.

I had been thinking about mounting a aux. battery to run a small inverter for a laptop and some 12 volt inside lighting.
If I were to mount the Aux. battery setup by the control for the lift, I would think it would be fine to run it off of this battery?
Then I could probably run a smaller wire from the aux battery to the lift to power it? I would still need some sort of circuit protection.

I still have the large flasher relays installed in the cabinet above the drivers seat. They both already have a heavy battery 12volt supply to them. If I were to wire one of the relays to engage when the ignition is on to use it as an isolation relay. Then run the relay output to the positive side of the auxillary battery, would this be a way to keep the aux. system charged?

I'm sorta talking outloud here / looking for confirmation that I'm thinking correctly.
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Old 11-25-2010, 12:57 PM   #5
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Re: Braun wheelchair lift wiring

Quote:
Originally Posted by snonbos
I'm in the process of installing a braun millenium lift that I picked up at a local auction into my shortbus. I have it mounted and have tested it out manually with the hand pump a couple of times and it seems to work fine. So, I'm on to the next step of wiring it up.

I want to size the positive cable and circuit protection. I was wondering if anyone who has one or pulled one out of their bus can tell me what the amp draw for the lift might be? I don't see any info on the lift itself (I could be just blind too) and I can't seem to find much info on the web about electrical requirements for one of these.

I did find some diagrams that mentioned using Brauns "circuit sentry(?)" close to the battery, but they don't say the amp rating of the breaker.

Thanks for any help.
I know I'm late on this but for anyone else that asks,
2 gage wire should be used
Often up near the battery is a circuit breaker most of time they are 90 to 100 amp. The braun and ricon breakers in my opinion are better quality then those cheap ones you can find on ebay and would be worth the money spent on them. They serve in case of overload on the lift motor and in case of a wire short. They are installed on the positive side of the battery and the ground can be grounded to the frame.

Doesn't matter if it is an old lift or new lift they are all pretty simple and really don't require an "expert" to install. The bolts should go all the way through the floor and you may need to use some angle iron or something simular on the under side for better distribution of the load on the floor. but with our steel floors it isn't required just some big washers.
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