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Switching table saw to 240v.

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Forum topic by JayTay posted 03-05-2014 02:22 AM 1173 views 0 times favorited 16 replies Add to Favorites Watch
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JayTay

15 posts in 1113 days


03-05-2014 02:22 AM

hello,

i got to change my saw over to 240. i turn that baby on and the lights dim….no good. i have a craftsman model 152.221040. the problem is from the switch to the motor there is another plug. it’s a 110 style plug. the manual says nothing about this plug just to change the on on the end of the cord coming out of the wall. is it safe to leave is as is and just do the conversion? thanks for any help.


16 replies so far

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TopamaxSurvivor

17871 posts in 3245 days


#1 posted 03-05-2014 02:36 AM

You need a proper outlet and plug to fit it. 240 will not be friendly to your other 120 volt equipment!

-- Bob in WW ~ "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

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bigblockyeti

4001 posts in 1290 days


#2 posted 03-05-2014 02:37 AM

To leave it you would have to have a 120V outlet that was actually putting out 240V. It will work, but is very bad practice due to the fact that you now have a 120V outlet (even though it’s on your saw) that has a 240V potential. While it is very unlikely that anything else would be plugged into the outlet on the switch, the fact that it could be would be reason enough for me to change both plugs instead of just the one going into the wall.

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CharlesA

3107 posts in 1367 days


#3 posted 03-05-2014 02:40 AM

Perhaps I read the OP wrong, but it sounds like he did change the plug on the saw that goes to the outlet, but there is a second 110 style plug that goes from the switch to the motor, right?

-- "Man is the only animal which devours his own, for I can apply no milder term to the general prey of the rich on the poor." ~Thomas Jefferson

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TopamaxSurvivor

17871 posts in 3245 days


#4 posted 03-05-2014 02:45 AM

Thanks CharlesA, I misread. You are correct. I am not sure what the proper answer is. It has to do with what the manufacturer’s intentions and what instructions say. It is not a code issue as it is not part of the building wiring or a motor protection issue.

-- Bob in WW ~ "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

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JayTay

15 posts in 1113 days


#5 posted 03-05-2014 02:48 AM

yes you are right CharlesA. from the wall to the switch is a NEW 240 plug and cord. but from the switch to the motor is ANOTHER 110 type plug in that cord. you can unplug the motor from the switch. i dont know why you would do that though.

what i want to know is will that plug handle the load if switched to 240v or should i just change it over too.

View sawdustjunkie's profile

sawdustjunkie

355 posts in 1286 days


#6 posted 03-05-2014 02:50 AM

I have a Craftsman 113 model and to run it on 220, you have to switch over some wires on the motor and then change the plug that goes into the wall and also have a 220 outlet wired for 220.
Otherwise you will have major problems and probably burn something up.

-- Steve: Franklin, WI

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bigblockyeti

4001 posts in 1290 days


#7 posted 03-05-2014 03:05 AM

The plug and outlet on the saw will certainly handle the current load as it will be in theory exactly half of what it was at 120V. The cord will probably handle it (especially since the motor can be switched to 240V), but I would still check to see what is imprinted on the jacket.

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MrUnix

4846 posts in 1768 days


#8 posted 03-05-2014 03:43 AM

The intermediate plug (from switch to motor) should not need to be changed.. The only thing you should have to do is (1) change the wiring in the junction box on the motor to switch from 120 to 240v and then (2) change the plug end to fit in your 240v wall outlet (from switch to wall). Motor wiring diagram should be on the inside of the junction box cover and indicate how to wire for 120/240v operation.

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

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JayTay

15 posts in 1113 days


#9 posted 03-05-2014 03:56 AM

thanks for the help guys. im going to give it a go. i’ll watch the temp on the inside plug after some use.

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Madbeez

6 posts in 19 days


#10 posted 03-03-2017 01:19 AM

I know this is a real old post but I have the same craftsman saw. I need the diagram to switch the motor back to 110. Was hoping jaytay was still around.It hummed at 220 and is probably the best home shop tool/saw I’ve ever purchased. This saw is a classic and the craftsman on it doesn’t speak to its quality and dependability.

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knotscott

7491 posts in 2945 days


#11 posted 03-03-2017 01:40 AM

The diagram should be on the inside of the cover of the wire junction box on the motor.

-- Happiness is like wetting your pants...everyone can see it, but only you can feel the warmth....

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MrUnix

4846 posts in 1768 days


#12 posted 03-03-2017 02:01 AM

The diagram should be on the inside of the cover of the wire junction box on the motor.
- knotscott

.... or on the motors data plate.

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

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JayTay

15 posts in 1113 days


#13 posted 03-03-2017 02:07 AM

Here it is bud! Let me know if you need anything else.

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Jesden

20 posts in 38 days


#14 posted 03-03-2017 04:25 AM

I just had this same issue. I put a 110 plug on wall first thinking 220 would be fine and the plug was cheaper than a 220 plug. It did not work. First time I plugged in the saw cord (which was new also) I saw archs and it burnt the plug. Researching I found out the plug just did not handle it and the saw never turned on either. I went back and changed out the cord and the plug and saw ran like a dream.

-- What you get by achieving your goals is not as important as what you become by achieving your goals.

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toolie

2052 posts in 2198 days


#15 posted 03-03-2017 11:36 AM

Wire the motor as indicated on the pic above. Already changed the plug and receptacle on the wall to 220. The plug between the switch and the motor are pass-throughs only and should not present a problem as 220 needs two conductors and a ground and that’s what’s present in the pass-through plugs

-- there's a solution to every problem.......you just have to be willing to find it.

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