3-Phase plug / socket
3-Phase plug / socket
I have a 3/4 hp 3-phase motor, and a static 3-phase converter.
I will eventually be building a rotary phase converter out of an old 1-1/2 hp 3-phase motor.
What is the "standard" 3-phase plug for this sort of application?
I understand that I could use anything I wanted and it wouldn't matter as long as it's all in my shop, but I'd like to have everything on whatever everyone else is (or is supposed to be) using.
Steve
I will eventually be building a rotary phase converter out of an old 1-1/2 hp 3-phase motor.
What is the "standard" 3-phase plug for this sort of application?
I understand that I could use anything I wanted and it wouldn't matter as long as it's all in my shop, but I'd like to have everything on whatever everyone else is (or is supposed to be) using.
Steve
Re: 3-Phase plug / socket
I use L15-20P and L15-30P with the associated receptacles or cord caps.
Glenn
Operating machines is perfectly safe......until you forget how dangerous it really is!
Operating machines is perfectly safe......until you forget how dangerous it really is!
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- Posts: 1955
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Re: 3-Phase plug / socket
That is the correct call for 240V, 480 V takes L16 series.
There is usually in the NEC, national electric code, NFPA 70, tables that list all of the recommended plug/receptacle configurations.
Can also usually be found online by looking up a device manufacturer, Bryant, Hubble, … and checking their reference tables, or by visiting a local electrical supply store.
There is usually in the NEC, national electric code, NFPA 70, tables that list all of the recommended plug/receptacle configurations.
Can also usually be found online by looking up a device manufacturer, Bryant, Hubble, … and checking their reference tables, or by visiting a local electrical supply store.
Re: 3-Phase plug / socket
OK, thanks.
I need to test the motor and a friend is using L15-20 for his 3-phase outlet, so I'll be good with that.
Steve
I need to test the motor and a friend is using L15-20 for his 3-phase outlet, so I'll be good with that.
Steve
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Re: 3-Phase plug / socket
Steve, I always understood L15-20 denotes a 20 amp plug, on a 20 amp circuit. If this is correct, your circuit amperage will govern which style plug you will want to use. l15-30 for example, would be used in a 30 amp circuit. They have different receptical profiles to match the plug
Glenn
Glenn
Moderator - Grand Scale Forum
Motive power : 1902 A.S.Campbell 4-4-0 American - 12 5/8" gauge, 1955 Ottaway 4-4-0 American 12" gauge
Ahaha, Retirement: the good life - drifting endlessly on a Sea of projects....
Motive power : 1902 A.S.Campbell 4-4-0 American - 12 5/8" gauge, 1955 Ottaway 4-4-0 American 12" gauge
Ahaha, Retirement: the good life - drifting endlessly on a Sea of projects....
Re: 3-Phase plug / socket
Yes, you are correct.Glenn Brooks wrote: ↑Thu May 02, 2019 11:01 pm Steve, I always understood L15-20 denotes a 20 amp plug, on a 20 amp circuit. If this is correct, your circuit amperage will govern which style plug you will want to use. l15-30 for example, would be used in a 30 amp circuit. They have different receptical profiles to match the plug
In my shop, this will be for individual machines with motors 1hp or less.
Engineers Toolbox says that a 3-phase 1hp motor at full load is only 3.6A
https://www.engineeringtoolbox.com/elct ... _1499.html
so the L15-20 will be more than enough.
If there is a smaller plug (rated for less current) then that would be fine as well.
I need to run 220 to the shop - right now, the only 220 outlet in the house is the dryer. I have a static converter, and I'll just rig that up with the proper plug and sockets, and eventually, I'll build a rotary converter out of the 3-phase motor I have.
Steve
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- Posts: 1955
- Joined: Wed Mar 15, 2006 11:10 pm
- Location: Farmington, NM
Re: 3-Phase plug / socket
For some period of time, my shop, welder included, shared a 220 V 40a amp circuit with a dryer. Never a problem as long as you remember who has priority and only run one thing at a time.
Re: 3-Phase plug / socket
A nice disconnect box with its own fuses is practically mandatory.
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- Posts: 2930
- Joined: Mon Nov 10, 2014 1:39 pm
- Location: Woodinville, Washington
Re: 3-Phase plug / socket
Should be more than enough... 220 amperage is normally half what you might see in a 110 v circuit. Although, some of the 220v 1 hp motors I researched online were rated at 12-15 amps! Not sure what their intended use was. Also unsure, actually don’t know how 3 Phase affects amperage. So Might be worth double checking your motor face plate as you plan out your electrical install. I ended up retro fitting my shop electrical circuits, (and sheet rock) 3 times before I finally got enuf circuits and outlets installed.
Glenn
Glenn
Moderator - Grand Scale Forum
Motive power : 1902 A.S.Campbell 4-4-0 American - 12 5/8" gauge, 1955 Ottaway 4-4-0 American 12" gauge
Ahaha, Retirement: the good life - drifting endlessly on a Sea of projects....
Motive power : 1902 A.S.Campbell 4-4-0 American - 12 5/8" gauge, 1955 Ottaway 4-4-0 American 12" gauge
Ahaha, Retirement: the good life - drifting endlessly on a Sea of projects....
Re: 3-Phase plug / socket
Disconnect boxes with a lever serve as a junction box. They are very important in isolating new work from older feeds. Troubleshooting requires narrowing any problem (unless you already know ) into sections. You don't want a latent issue coming to life when you're not there to see it.