Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Electrical

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 02-14-2013, 11:46 AM   #1
Newbie
 
Join Date: Feb 2013
Posts: 4
Share |
Default

3 blade 220v to 4 blade..Please help


I hope I'm posting this in the right area.I appreciate any input as I have no knowledge in electrical.I have a concrete floor grinder that requires 220v to run.My plan was to hook it up to my 5500 watt generator in the 120/240v outlet.My dilemma is that the plug on the machine is a 3 blade and the the generator takes a 4 blade connector.Can I swap the plugs out ? If so what wires go where? thanks for any help...

Cee1281 is offline   Reply With Quote
Old 02-14-2013, 12:08 PM   #2
Electrical Contractor
 
kbsparky's Avatar
 
Join Date: Sep 2008
Location: Delmarva
Posts: 3,361
Default

3 blade 220v to 4 blade..Please help


Simply omit the neutral conductor on a new NEMA L14-30P cord cap.

__________________
-KB

Life is uncertain -- eat dessert first!!
kbsparky is offline   Reply With Quote
Old 02-14-2013, 07:02 PM   #3
Newbie
 
Join Date: Feb 2013
Posts: 4
Default

3 blade 220v to 4 blade..Please help


Thanks for the reply, so just to make sure I understand..Im going to use the 3 wires off the 3 blade connector and connect them to the L14-30P cap,so ill have a ground wire and the other 2 wires connected to the new cap but not using the neutral at all? Does that make sense..

Lastly what blades does the wires hook up to on the new cap, I know one blade has a L shape to it...

thanks for your help
Cee1281 is offline   Reply With Quote
Old 02-14-2013, 07:41 PM   #4
Electrical Enthusiast
 
Join Date: Jan 2013
Posts: 725
Default

3 blade 220v to 4 blade..Please help


Lastly what blades does the wires hook up to on the new cap, I know one blade has a L shape to it...

thanks for your help[/QUOTE]

The L-shaped one is the ground connection, it should be a bare or green-colored wire.
The two prongs to the left and right of this are your two hot connections, the other two wires will connect to this. The prong across from the ground (L-shaped) prong would be the neutral, which you aren't using in this case.
Kyle_in_rure is offline   Reply With Quote
Old 02-15-2013, 08:07 AM   #5
Master Electrician
 
Join Date: Nov 2008
Location: Northern Virginia
Posts: 463
Default

3 blade 220v to 4 blade..Please help


Quote:
Originally Posted by Kyle_in_rure View Post

The L-shaped one is the ground connection, it should be a bare or green-colored wire.
The two prongs to the left and right of this are your two hot connections, the other two wires will connect to this. The prong across from the ground (L-shaped) prong would be the neutral, which you aren't using in this case.
You got that dead wrong.

Mark
__________________
Licensed Master Electrician
Commonwealth of Virginia
busman is online now   Reply With Quote
Old 02-15-2013, 10:08 AM   #6
Newbie
 
Join Date: Feb 2013
Posts: 4
Default

3 blade 220v to 4 blade..Please help


Quote:
Originally Posted by busman View Post
You got that dead wrong.

Mark
Can you please elaborate, just want to make sure I'm doing this correctly, I don't want to mess nothing up....


What's the correct way?
Cee1281 is offline   Reply With Quote
Old 02-15-2013, 10:48 AM   #7
Electrical Enthusiast
 
Join Date: Jan 2013
Posts: 725
Default

3 blade 220v to 4 blade..Please help


Quote:
Originally Posted by busman View Post
You got that dead wrong.

Mark
Are you sure?
We are talking a bout a L14-30P, correct?
And since it's 240 volts, 3-wire, there's no neutral, it would be omitted, correct?

This is the plug we're talking about, correct?
http://www.bing.com/images/search?q=...electedIndex=5

Hope I'm not misreading....
Kyle_in_rure is offline   Reply With Quote
Old 02-15-2013, 11:46 AM   #8
Electrical Contractor
 
rrolleston's Avatar
 
Join Date: Oct 2011
Location: Granville, NY
Posts: 1,941
Send a message via AIM to rrolleston Send a message via Yahoo to rrolleston
Default

3 blade 220v to 4 blade..Please help


With an L14-30 plug the two hots go on the brass screws and the ground goes to the green screw. Leave the silver neutral screw empty.
__________________
With Electricity there is the right way to do it and the dead way. Just because it works does not make it safe.
rrolleston is offline   Reply With Quote
Old 02-15-2013, 12:06 PM   #9
Newbie
 
Join Date: Feb 2013
Posts: 4
Default

3 blade 220v to 4 blade..Please help


I bought a 4 blade plug and it has L14-30P on it, so I'm assuming that's what I need...
Cee1281 is offline   Reply With Quote
Old 02-15-2013, 12:24 PM   #10
Master Electrician
 
Join Date: Nov 2008
Location: Northern Virginia
Posts: 463
Default

3 blade 220v to 4 blade..Please help


The L shaped blade is the neutral.

Mark
__________________
Licensed Master Electrician
Commonwealth of Virginia
busman is online now   Reply With Quote
Old 02-15-2013, 12:33 PM   #11
Master Electrician
 
Join Date: Nov 2008
Location: Northern Virginia
Posts: 463
Default

3 blade 220v to 4 blade..Please help


I'm sorry. The OP wasn't clear. Does the generator have a locking receptacle or not. My comment was directed at non-locking. I don't know that I would say the blade on a locking plug is exactly "L" shaped.

I missed the second OP post that specified locking.

Mark
__________________
Licensed Master Electrician
Commonwealth of Virginia

Last edited by busman; 02-15-2013 at 12:42 PM. Reason: Saw later post
busman is online now   Reply With Quote
Old 02-15-2013, 06:08 PM   #12
Electrical Contractor
 
rrolleston's Avatar
 
Join Date: Oct 2011
Location: Granville, NY
Posts: 1,941
Send a message via AIM to rrolleston Send a message via Yahoo to rrolleston
Default

3 blade 220v to 4 blade..Please help


Quote:
Originally Posted by busman View Post
The L shaped blade is the neutral.

Mark
Where do you get your L14-30 plugs and receptacles. The L shaped blade is the ground.
__________________
With Electricity there is the right way to do it and the dead way. Just because it works does not make it safe.
rrolleston is offline   Reply With Quote
Old 02-15-2013, 06:45 PM   #13
MarginallyQualified
 
Join Date: Dec 2011
Location: Winston-Salem NC
Posts: 3,650
Default

3 blade 220v to 4 blade..Please help


Quote:
Originally Posted by busman View Post
The L shaped blade is ______
Mark
sure?
Attached Images
 
TarheelTerp is online now   Reply With Quote
Old 02-15-2013, 07:13 PM   #14
Electrical Enthusiast
 
Join Date: Jan 2013
Posts: 725
Default

3 blade 220v to 4 blade..Please help


Gotta love those twistlocks....
Kyle_in_rure is offline   Reply With Quote
Old 02-15-2013, 08:03 PM   #15
Master Electrician
 
Join Date: Nov 2008
Location: Northern Virginia
Posts: 463
Default

3 blade 220v to 4 blade..Please help


Quote:
Originally Posted by TarheelTerp View Post
sure?
It doesn't look like an L to me.

Mark

__________________
Licensed Master Electrician
Commonwealth of Virginia
busman is online now   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
How many Tooth Saw Blade for Trim? HandyFrank Carpentry 11 12-28-2011 07:11 PM
220V & 110V outlets rickinnocal Electrical 21 05-13-2011 01:16 PM
most efficient way to cut poured concrete floor Allthunbs Plumbing 10 12-16-2010 04:55 AM
Should I attempt to bring back my blade? Piedmont Carpentry 5 09-09-2010 04:26 PM
220V Washer 3-pronged to 220V dryer-outlet Primergy Electrical 19 03-27-2008 10:40 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.