4 post lift wiring questions...110 vs 220?

[E30 Racer]

I plan to order an HD-7W in a few days, and have a few final details I'd really appreciate feedback on.

Wiring

When the garage was built, I had a 30A 220 junction box installed in the 14' ceiling above where I had planned to install a 2 post lift. Plans changed, so to make this work with the 4 post setup will require a run from the junction box to the rear and right of the garage (about 10 and 6 ft, respectively). To make this look decent, I was planning to use white painted conduit and hangers to suspend the run about 6-12" from the ceiling, then downward to the left rear post. I haven't been able to find any examples of how this would look though.

Alternatively, if I use 110, I can just plug the lift into a wall outlet (20A) about 6 ft from the left rear post. This is definitely the easiest option, but I'd rather not have a cord on the ground. Is it common for people to simply plug the lift in when needed, and unplug it when its not? The lift will be used primarily for storage.

Lifting Speed

From what I can tell, while there is a difference between lift times, many people don't seem to mind the slower lift speed of the 110. For those of you that have used both, now that you've lived with them, do you have a strong opinion one way or the other?

Bendpak's Compressed Air Bottle

I like the concept, but not the cost. For those of you that have them, how's the reliability been? Knowing what you know now, would you have made the same decision? Since I don't have a decent supply of shop air yet, I'll have to use a small compressor for now.

 

[sberry]

You can use the same wire with either voltage. Got a bud hung a 25 ft cord for one up over the ceiling and to a plug where its been there 25 years.

 

[alfredeneuman]

When you read the installation manual, both a disconnect and thermal protection (not included with the unit) are required.
You can't just plug it in as shipped.

 

[The Cobbler]

...

Lifting Speed

From what I can tell, while there is a difference between lift times, many people don't seem to mind the slower lift speed of the 110......

I don't think 240 will lift any -faster then 120 . is that documented in the manual?

 

[E30 Racer]

I don't think 240 will lift any -faster then 120 . is that documented in the manual?

I'd have to dig up the reference, but its my understanding the lesser voltage is about 40-50% slower. Practically speaking, that equates to an additional 15-20 seconds or so.

 

[Stuart in MN]

I have an older Stinger lift in my garage that runs on 120vac. I don't have a comparison to what it would run like on 240vac, but it works just fine as is, plus it doesn't require any special installation - it just plugs into the nearest receptacle.

 

[jeepxj]

I don't think 240 will lift any -faster then 120 . is that documented in the manual?

its far far less power being delivered. of course its slower. unless you're doing 60a 120 circuits

 

[PedroEvo]

110 is definitely slower then 220.

However..
If you use it once a week or something similar it doesn’t even matter.

If you use the hoist even less then you can just plug it in when you need it then unplug it. I see a lot of people doing that.




Sent from my iPhone using Garage Journal

 

[alfredeneuman]

its far far less power being delivered. of course its slower. unless you're doing 60a 120 circuits

It's exactly the same amount of power being delivered.
The size of the circuit used has absolutely no effect on it

 

[wssix99]

I have a similar issue. I'm just going to put a new box in the ceiling, run conduit between the boxes and then put a blank plate over the original box.

 

[wyliesdiesels]

its far far less power being delivered. of course its slower. unless you're doing 60a 120 circuits

Totally incorrect.

Power is aka watts.

The watts doesnt change, the amperage does, when its an inductive load.

If we were talking about resistive load, then yes the 120v power would be 1/4 of the power at 240v.

 

[jeepxj]

I understand how volts * amps = wattage.

the motor is a different motor with less HP. hence the slower speeds. if it was exactly the same wattage being used the speed would be the same.


if you can explain to me the slower speeds by 50% where the same wattage is consumed i'm all ears.

 

[jeepxj]

It's exactly the same amount of power being delivered.
The size of the circuit used has absolutely no effect on it

30a of 240v is twice the power as 30a of 120v. what am i missing here?


looking at the manual for this lift:
https://www.bendpak.com/HD-7-Four-Post-Lift-Manual-5900041-BendPak.pdf

110v power pack is model: BendPak 5585178 1.5HP
https://www.bendpak.com/Hydraulic-Power-Unit-E08B8F1-5585315-Ranger-Products.pdf

the 220v 1p power pack is: 2.5HP.
https://www.bendpak.com/car-lifts/hydraulic-power-units/e21f3h1/



thus i'm pretty sure still that the 240 unit is delivering more power to the hydros than the 110 unit. unless HP ratings are now voltage dependant? I feel like my whole life is a lie if thats the case.

please don't eat me alive here.

 

[wyliesdiesels]

30a of 240v is twice the power as 30a of 120v. what am i missing here?


looking at the manual for this lift:
https://www.bendpak.com/HD-7-Four-Post-Lift-Manual-5900041-BendPak.pdf

110v power pack is model: BendPak 5585178 1.5HP
https://www.bendpak.com/Hydraulic-Power-Unit-E08B8F1-5585315-Ranger-Products.pdf

the 220v 1p power pack is: 2.5HP.
https://www.bendpak.com/car-lifts/hydraulic-power-units/e21f3h1/



thus i'm pretty sure still that the 240 unit is delivering more power to the hydros than the 110 unit. unless HP ratings are now voltage dependant? I feel like my whole life is a lie if thats the case.

please don't eat me alive here.

Were talking about power draw of the same motor at different voltages. Current draw(amps) is not the same as power(watts) draw.

A 5HP motor will draw the same power at 120v as it will at 240v. The only difference is the current draw.

look at T430.248

5HP at 120v is 56a which = 6720w
5HP at 240v is 28a which = 6720w

 

[jeepxj]

Were talking about power draw of the same motor at different voltages. Current draw(amps) is not the same as power(watts) draw.

A 5HP motor will draw the same power at 120v as it will at 240v. The only difference is the current draw.

look at T430.248

5HP at 120v is 56a which = 6720w
5HP at 240v is 28a which = 6720w

I understand all that. power is power. 1v at 1500a is the same as 1500v at 1a.

the original question was about the HD7 specifically so I looked up the motors involved and they are absolutely different HP ratings.

the confusion appears that I was speaking specifically about the HD7 without stating as such earlier on in this thread.

To generalize; if the HD7 came with 2.5hp motors in both 110 and 240v flavors the above statement would be true; power is power.

edit: i see i said 60a at 120. i missed conveying the sarcasm with it. I get where this went off the rails.

 

[Brno8x57]

I have a Bendpak 4 post lift and have a 240 and 120 power unit. 240 is significantly faster, it seem to take a long time at 120 because I started with 240 and then installed 120 in the new house with no 240 access.
I have 240 access now but too lazy to switch. Once or twice a
Week, I’ll live with 20-30 extra seconds.

 

[LX-Markham]

WRT the air bottle: I would get a small airbrush compressor or 1 gal. nailor compressor instead.

 

[Falcon67]

What I found LOL was pulling $$ 10-3 cable for a 240V 30A breaker run to my two post, then opening up the connection housing to find 14 gauge wires running from the motor.

 

[sberry]

Yes, 30 is the max breaker, the leads are sized for the actual load. You need the 10 if you are using a recept, if its a single circuit in pipe and hard wired it can be 14 wire.

 

[wyliesdiesels]

What I found LOL was pulling $$ 10-3 cable for a 240V 30A breaker run to my two post, then opening up the connection housing to find 14 gauge wires running from the motor.

Those 14 gauge wires could be rated for 105°C and thus rated for higher current than 14 gauge building wire rated @ 75°C

 

[sberry]

They let it be rated 100% too as it has a limited cycle.