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Switching table saw to 240v.

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Forum topic by JayTay posted 03-05-2014 02:22 AM 887 views 0 times favorited 9 replies Add to Favorites Watch
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JayTay

14 posts in 1009 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.


9 replies so far

View TopamaxSurvivor's profile

TopamaxSurvivor

17671 posts in 3141 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

View bigblockyeti's profile

bigblockyeti

3668 posts in 1185 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

3022 posts in 1262 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

17671 posts in 3141 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

14 posts in 1009 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

343 posts in 1182 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

3668 posts in 1185 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

4230 posts in 1664 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

View JayTay's profile

JayTay

14 posts in 1009 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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