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Old 07-28-2013, 01:47 PM   #1
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Motor rating on outlets?


I just noticed that Leviton 6-20 outlets are rated to 2hp and 5-20 to 1hp.

Like most other people, I have been using them to 3hp and 1.5hp for years.

Is this actually an issue?

http://www.leviton.com/OA_HTML/Produ...minisite=10251

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Old 07-28-2013, 04:50 PM   #2
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Motor rating on outlets?


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Originally Posted by Toller View Post
I just noticed that Leviton 6-20 outlets are rated to 2hp and 5-20 to 1hp.

Like most other people, I have been using them to 3hp and 1.5hp for years.

Is this actually an issue?

http://www.leviton.com/OA_HTML/Produ...minisite=10251
Of course it's an issue, they will prematurely fail. Why do you think they are only rated for a specific HP?

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Old 07-28-2013, 05:57 PM   #3
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Motor rating on outlets?


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Originally Posted by stickboy1375 View Post
Of course it's an issue, they will prematurely fail. Why do you think they are only rated for a specific HP?
Checking my manuals; Jet, Grizzly, Sawstop, and Rikon recommend 6-20/5-20 for their 3hp/1.5hp tools.
Are Leviton inferior to other brands? What brand has a better hp rating?

What should be used?
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Old 07-28-2013, 07:34 PM   #4
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Motor rating on outlets?


You apply those HP ratings when you are using those receptacles as the required disconnecting means.

Otherwise, you should not have any problems as long as you are within the amp rating of the receptacle/circuit.
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Old 07-28-2013, 07:45 PM   #5
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Motor rating on outlets?


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Originally Posted by kbsparky View Post
You apply those HP ratings when you are using those receptacles as the required disconnecting means.

Otherwise, you should not have any problems as long as you are within the amp rating of the receptacle/circuit.
That makes sense. Thanks.
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Old 07-30-2013, 10:50 AM   #6
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Motor rating on outlets?


I contacted Leviton. They say that using it as a disconnect is irrelevant; the outlet must be rated for the motor using it.

For a 3hp motor they recommend a:
http://www.leviton.com/OA_HTML/Produ...minisite=10251

Did I get a moron, or is it true? Could Grizzly, Jet, Sawstop, and Rikon be recommending unsafe outlets?
Or is Leviton's 6-20 inferior to others? (nope, other brands are 2hp also)

Last edited by Toller; 07-30-2013 at 09:40 PM.
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Old 07-30-2013, 05:17 PM   #7
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Motor rating on outlets?


Could Grizzly, Jet, Sawstop, and Rikon be fluffing their HP ratings for advertizing purposes ????

I think kbsparky gave you the correct info.
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Old 07-30-2013, 09:49 PM   #8
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Motor rating on outlets?


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Originally Posted by Oso954 View Post
Could Grizzly, Jet, Sawstop, and Rikon be fluffing their HP ratings for advertizing purposes ????
Maybe. If they are only 2hp, then they are fine.
Perhaps the equipment manufacturers measure HP differently than the outlet manufacturers do.
My 3hp Grizzly cyclone is 22a, and my 2hp Sawstop is 13a. I suspect one is measured oddly.
Quote:
I think kbsparky gave you the correct info.
Leviton specifically said that is not correct.
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Old 07-31-2013, 12:58 AM   #9
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Motor rating on outlets?


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Leviton specifically said that is not correct.
Leviton did not say anything. It can't talk.
What you had was one Leviton employee talking and he/she was winging it.
Did you ask what code section requires it ? Or, what that employee's expertise was with the NEC ?

Your on/off switch is your disconnect, not your plug and receptacle.
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Old 07-31-2013, 02:15 PM   #10
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Motor rating on outlets?


I agree that Leviton's employee was incorrect. Disconnecting devices are HP rated, not wiring devices. Wiring devices are current/voltage rated, because that's the only relevant rating. The HP disconnect rating is lower than the volt/amp rating for a device because the starting surge and inductive load of a motor tends to burn the contacts on disconnecting devices.
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Old 08-01-2013, 02:46 PM   #11
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Motor rating on outlets?


I spoke to CS at Hubbel and Cooper. Both say that the HP rating only applies when the outlet is used as a disconnect.
So I guess I am good with that.

Still, two people at Leviton told me exactly the opposite; exceeding the rating can cause a fire, even if it is never used as a disconnect.
Guess I should avoid using Leviton.
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Old 08-02-2013, 04:33 AM   #12
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Motor rating on outlets?


The problem with those idiots at Leviton is you won't be exceeding the rating of the receptacle during normal use.

It's disconnecting or reconnecting under load that can cause overloading conditions when used on motor circuits.

Hence the reasoning behind my original assertion that those HP ratings apply only to when used as disconnecting means.

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