Lift power shutoff switch and overload protection

[cccoltsicehockey]

Getting ready to have my lift installed next week. The installers are bringing it with them as I had no way to unload it at my house. I am doing the electrical work for it though. I have read on here a few times about having a motor overload protection and a manual shutoff switch. The lift is a Bendpak 10APX but the motor documentation on the site just says single phase 220v. I had a 10awg 30amp circuit pulled for it since the documentation states it needs at least 25amp circuit but the Bendpak rep said they prefer it on a 30amp so that is what I did.

Would these both be sufficient?

https://www.amazon.com/gp/product/B002LVUWHM/?tag=atomicindus08-20

https://www.amazon.com/dp/B003GIS2O4?tag=atomicindus08-20

 

[wyliesdiesels]

need to know the motor HP rating. unfortunately, bendpak's documentation is poor and they do not list the motor HP rating anywhere.

any way you can ask them to take a pic of the motor nameplate and send it to you?

 

[cccoltsicehockey]

need to know the motor HP rating. unfortunately, bendpak's documentation is poor and they do not list the motor HP rating anywhere.

any way you can ask them to take a pic of the motor nameplate and send it to you?

Called and left a message. I imagine it is most likely a 2hp as that seems to be what they use most of the time. I guess I could order the 2hp and the 3hp since coming from Amazon an the return would be easy just in case. This would only matter for the overload protection though correct? I can order any 30amp switch regardless of the motor size?

I was even considering this switch since it would be more obvious in an emergency to someone other than me.

https://www.amazon.com/gp/product/B09D44XM8V/?tag=atomicindus08-20

 

[micromind]

The 30 amp switch will be fine.

The overload is often built into the motor. If it's not, you'll need the full load amps and service factor from the motor nameplate.

 

[wyliesdiesels]

The 30 amp switch will be fine.

The overload is often built into the motor. If it's not, you'll need the full load amps and service factor from the motor nameplate.

regardless of the overload being integral, the disconnect still needs to be rated for the same or greater HP as the motor.

 

[cccoltsicehockey]

Ok, guess I will need to wire it without one so the install can be done and then order one based on the motor after that.

 

[mm08822]

Use a knife blade style disconnect with a hp rating stated on the label.

You don't want to be depending on spring loaded contacts to release vs risk putting a vehicle through the roof.

 

[cccoltsicehockey]

Use a knife blade style disconnect with a hp rating stated on the label.

You don't want to be depending on spring loaded contacts to release vs risk putting a vehicle through the roof.

Is this what you are referring to?

Amazon.com

 

[mm08822]

Yes, good up to 5 HP.

 

[no704]

Yes, good up to 5 HP.

And you can lock it out!

 

[mm08822]

And you can lock it out!

I'd be more concerned with which side of the roof is best to drive the car off from.

 

[micromind]

regardless of the overload being integral, the disconnect still needs to be rated for the same or greater HP as the motor.

Plus, it'll need to disconnect both hots, not just one.

 

[dave*99]

Leviton MS302-DS 30 Amp, 600 Volt, 2-Pole, Single-Phase Single Throw AC Manual Motor Controller, Suitable as Motor Disconnect, Non-Grounding - Black​

https://www.amazon.com/Leviton-MS302-DS-Disconnect-Industrial-Non-Grounding/dp/B002MPQ51O/?tag=atomicindus08-20

 

[Norcal]

Buy a cheap pullout A/C disco, cheaper then that Leviton switch.

 

[ericm]

Buy a cheap pullout A/C disco, cheaper then that Leviton switch.

I thought one of the reasons for adding a shut off was if the existing switch fails on. In which case you'd want a fast way to shut it down.

 

[PT Doc]

Interesting that the guess is 2-3hp motor but the rep wants 30a disconnect. Let us know how it goes.

 

[dave*99]

I thought one of the reasons for adding a shut off was if the existing switch fails on. In which case you'd want a fast way to shut it down.

Exactly. My disconnect switch is very close to the push button on the lift pump. Quick and easy.

I have seen the push buttons fail.
The safety bar will stop my lift but I’d prefer a quick was to stop it myself.

 

[mm08822]

For speed, either use the lever arm blade disconnect or an ac disconnect with the lift cover removed. I would still pick the lever arm disco.

 

[Norcal]

For speed, either use the lever arm blade disconnect or an ac disconnect with the lift cover removed. I would still pick the lever arm disco.

Have you priced safety switches? I prefer them also but the are not cheap.

 

[dave*99]

However you choose your disconnect, consider that it can also be a kill switch. A disconnect is a convenient way to locally remove power so you can safely service a device.
A kill switch should be close to the operators position so it can be activated without moving much. I mounted mine right on the lift post. I can reach the power push button with one hand and flip the disconnect with the other.

 

[cccoltsicehockey]

Interesting that the guess is 2-3hp motor but the rep wants 30a disconnect. Let us know how it goes.

It is really weird what BendPak requests for power based on the actual motor they send. The lift was installed and I hooked the power up with no protection so that they could prime the pump.

Here are the specs on the motor itself. Which really means a 20amp circuit should be fine.


However, right next to that information is this. Which to me makes absolutely no sense.


I ended up sticking with this style switch instead of the blade switch. The blade enclosure was just much larger.


It also states right on it that it is meant to be a motor disconnect and the spec motors it is good for covers the motor size on the lift.


I did go with a different enclosure for the switch with is more obvious and easier to operate quickly in the need of it to be a safety while still being smaller than the blade style switch I was looking at.


I placed it right next to the lift motor so you can operate it very quickly if it is needed.

 

[cccoltsicehockey]

I still need to order and install the overload safety. I think from the lift motor information this is the one that I want. https://www.grizzly.com/products/gr...XuyB38Tlw_GNOO4pWLkuHCfCJhV5im0caAnABEALw_wcB

It seems really odd to me that there seems to be so few places that actually sell these things.