Rotary phase converter panel to idler wiring.

[PT Doc]

I am wiring up an American Rotary phase converter for a 5 hp milling machine. RPC is 10 hp. I have all the wiring figured out but am thinking about connection the panel to the idler motor. Panel is 4 feet off the floor. Idler will be a few feet off to the side so this total linear wiring distance is probably 9 feet max. I am running all of the surface mounted wiring in 3/4” liquidtight for the 240v switch and other wiring connections that I needed. I chose the liquidtight for the ease of cutting and durability.

My understanding is that SO cord is for a temporary connection like a motor to outlet or extension cord. My floor 10 HP motor will be hardwired into the RPC panel. I am assuming that using SO cord for this is not code compliant. I was planning on using 3/4” liquidtight but have 10/4 SO cord that I could use. This would be a bit easier to work with but the motor will not be moved once the connection is made.

Any insight on the permanent connection between RPC and idler motor and use of SO cord would be appreciated. American Rotary won’t be contacted since they say to keep everything code complaint. I have seem numerous RPC yt vids that have SO all over the place and in my opinion those were not an appropriate use of SO cord.

Thanks in advance for the help.

 

[larry_g]

I use my own judgment in cases like this. It's like rolling a stop sign in the middle of nowhere in the middle of the night. Is the wire capable of the current that you are asking it to carry? Is the insulation rated for the heat and voltage? Then go for it. Who is going to come into your noncommercial shop and check things out? When moving strip it out and no one is any the wiser.

That said; is 10 gauge wire capable of handling a 10hp motor?

lg
no neat sig line

 

[PT Doc]

I use my own judgment in cases like this. It's like rolling a stop sign in the middle of nowhere in the middle of the night. Is the wire capable of the current that you are asking it to carry? Is the insulation rated for the heat and voltage? Then go for it. Who is going to come into your noncommercial shop and check things out? When moving strip it out and no one is any the wiser.

That said; is 10 gauge wire capable of handling a 10hp motor?

lg
no neat sig line

This 10HP Baldor 3 phase 1800 rpm is rated at 28 amps for 230v. American Rotary states that min recommended wire gauge for the panel to idler connection for this 10HP motor is 12. I went with 10g. Of interest, in the same chart they state that the 15 and 20hp models have min rec. wire for the same connection of 10g.

 

[pistolpete1313]

You'd be fine with the so, it's the 'if it's there over a year rule' for protection. If your looking for ease you could do Romex or mc if you want to go nuts and be done with it

Sent from my Pixel using The Garage Journal mobile app

 

[wyliesdiesels]

I use my own judgment in cases like this. It's like rolling a stop sign in the middle of nowhere in the middle of the night. Is the wire capable of the current that you are asking it to carry? Is the insulation rated for the heat and voltage? Then go for it. Who is going to come into your noncommercial shop and check things out? When moving strip it out and no one is any the wiser.

That said; is 10 gauge wire capable of handling a 10hp motor?

lg
no neat sig line

depends on whether its single or 3 phase.