ECN Forum Forums General Topics of the Trade General Discussion Area Air Commpressor repecticale

What the manufacturers and thier salesmen do to sell is unfortunatley not covered by the NEC.
Our work is supposed to be up to at least that standard.
If the compressor comes with a set of manufacturers instruction about installation the by all means follow them. If all you have is the motor data plate then you have to use the code to determine a safe install.

Ed,

I know that you didn't mean this, and that you really meant the NEC is our standard. . .but I sure did enjoy the laugh

Al

Thanks Al
Guess i need to reread my posts to check myself.
Yes The NEC is our MINIUM standard.

wow!! many thanks for your info and help with me and in fact,, i did talk to my comusmter and he decided go with hard wire and now it work really well .


winnie: let you know this is a genral usage motor 7.5 hp @1780 rpm [ this came off from nameplate. thanks ..

merci , marc

Wowsers. Making that work would require a hefty receptacle...probably cheaper to install a 240 to 600V step up transformer, suitable (lower current) receptacle, and get a 600V motor (*grin*)

I stand by my contention that if this were a _listed_ _ampere rated_ _appliance_, that the ampere rating could be used to determine conductor size, disconnect rating, and OCPD. But given that this is a general purpose _motor_ with a _horsepower_ rating sitting on an appliance, the _horsepower_ rating is what holds sway.

In my mind, the only still open is weather the provision which permits the use of the ampere rating for the 'disconnect means' makes using the ampere rating okay for selecting a receptacle. Again, this would not apply to the present case, but I believe that it does apply to the 'big orange store' compressors.

Thanks all for a great discussion, and good news that you were able to educate your customer, marc.

-Jon