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| Subject - 5hp 230v 1ph wiring | |
| yellowltd | Bought a 3hp compressor, no motor or pressure switch on it. Got a switch off the 'net, and a 5hp 'made in china' motor from Harbor Freight. Only 230v outlet is the dryer plug. So, got a dryer cord/plug from Lowe's, it has four wires: black, red, white, green. Both motor and switch only have two connections inside, plus ground. Diagram on side of motor says to connect blue and red wire to one pole, black to the other. I ain't got no blue wire. This would lead me to assume that I am to connect the red and white wires together on one pole, and black on the other. However, a little voice in the back of my head keeps telling me white is neutral, and I would like to avoid going to the other end of the house to reset the breaker shortly after the plug goes in the outlet (or using a fire extinguisher on my nice new pressure switch). Is the little voice misleading me? |
| kbsparky | You need a NEMA 6-30R receptacle for a compressor hook-up as you have described, the dryer outlet is most likely a NEMA 14-30R. IF you are not using that dryer outlet for a dryer, you may be able to change it over to the proper configuration, and then replace that cord with the correct type. If you do have a dryer present, then you should have a new circuit installed with the correct configuration outlet to match the load from the compressor. |
| yellowltd | quote: Thanks kbsparky. Not the answer I was hoping for, but one I expected. The cord is still in the packaging, in the bag, with the receipt. So, how does one go about converting the receptacle (step 1: purchase NEMA 6-30Receptacle. Step 2: open main breaker. Step 3...)? Also, will this be reversible at a later date if necessary? Thanks again for your help. |
| JimmyDee | yellowltd, This site is not set up for a do-it-your-selfer to glean information on how to do electrical. Because of the good probability of misunderstanding of information between a professional electrician and one that is not, a dangerous situation could result. So, since the rules clearly state that this is not allowed here and in my opinion this is the case with these posts, I am locking further discussion on this thread. I hope you understand. Jim (moderator) |