Proper Wiring PRS Standard

[jkaras2000]

Hi Gang: Can someone please give me your feedback on proper wiring for my new PRS Standard 48 x 96 2.2HP Spindle. Shopbot tech suggest one 60amp breaker/single feed. My electrician warns that this could cause an unsafe condition because it would take a great amount of draw to pop the 60 amp breaker. I don't want to damage my machine or spindle in any way. I would like to do it in the safest manner possible. Thanks in Advance. Joe. :cool:

[michael_schwartz]

I would get your electrician on the phone with SB tech support. You don't want to do anything that may violate codes in your jurisdiction.

Another thing to do may be to consult an electrician in your area that has more experience with commercial/industrial wiring.

[curtiss]

A 60 amp breaker sounds quite big...

was he talking a 60 amp service for the whole box ??

The 3.5 hp PC router only pulls about 6 amps...

[ken_rychlik]

The control box has smaller fuses to each component inside. 60 seems like a lot, but if the wire is sized properly, I wouldn't see a problem.

[Gary Campbell]

Joe...
There are a number of different volt/amp configurations available. If there is not an electrical requirement tag on the control box, your best answer is to have SB fax or email one to you so that your electrican can wire it properly according to local codes.

Now is not the time to write a horror story:mad:

[kubotaman]

Check to see if I am correct. I run my 5hp auto toolchanger off of 40 amp breaker and I feel I could have done it on a 30 amp. I think if you inquire that you may find that for your setup a 60 amp is more than adaquate for the spindle along with control box. If so you run a small 60 breaker box mounted on your machine and then split the 60 amp box down to smaller breakers. To run a 2.2 spindle off a 60 amp breaker will make it too much to protect it. You want the breaker to let go and not hold closed for too long. Otherwise you are going to cause non reversable damage to your equipment. If you want pictures asto how I did it just ask.

[gundog]

You need to calculate all the load you will be serving with this service. Then install a service to fit the need. The breaker if 60 amps will need at least #6 CU or larger depending on length. My 3 HP Columbo spindle requires a 30 amp 240v 1Ø service. My vacuum hold down is fed on a separate service 20 amp 240 v 1Ø service and I run the control box and PC on a 20 amp 120v service. Each is fed off a seperate run from my sub panel in my shop. If I had ran a single service from the sub panel to feed all three it would have required a 60amp sub and individual breakers or fuses for each load.

It really depends on your situation and how far you need to pull the power from. Your electrcian when given the proper info will give you your best plan for your situation. If your sub panel is close by your machine he will probably serve each load the way I did. If you power needs to come a long distance he will probably run a main feed for it to a sub panel and split it there.

I am not an electrician but I have worked in the utility industry for almost 30 years.

Mike

[meatbal80]

I am not an electrician but the way i have understood electric motors is that there is a direct correlation between HP and Watts or power drawn.


I have been led to believe that spindles are rated at actual HP and not the fictional like the PC routers and most portable power tools. Example my "6 HP" shop vac that runs on a standard 15 amp 110 volt circut. Versus the 7.5 HP 3 phase vacuum pump we are in the process of installing in our shop with only single phase service. We will be using a VFD to power the motor and because we are converting single to 3 phase we have the double the circut size. Even with that it will go on a 60 amp dedicated circut.

Definatly have a good electrician look at all of the information and get the right size but 60 amp for 2.2hp sounds wrong.

[beacon14]

My PRTAlpha with a 2.2 HP spindle has been running on a 30Amp breaker and #10 wire for about four years now. Not telling you how to wire your machine, just relaying my personal experience.

[jerry_stanek]

I am running a 30 amp breaker and number 10 wire also. check the wire on the VFD.

[ATX Poly Products]

I am running my set-up on 8 gauge copper 40 amp breaker... Spindle and table

[jkaras2000]

Thanks Adam: I spoke to my electrician, and he seems to think that a 30 amp should do it. Have you always used a 40amp? Do you think the 30 is enough? Joe.:cool: