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electrical question with woodmaster 7.5 hp motor

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Forum topic by , posted 06-07-2011 01:40 AM 1270 views 0 times favorited 6 replies Add to Favorites Watch
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,

2387 posts in 3014 days


06-07-2011 01:40 AM

I am getting ready to wire up the woodmaster, we ran 10/3 wire and have a 40 amp breaker but I have not actually wired the machine up inside my electrical box yet. I will need to do this soon though as we will be needing to run some custom moldings soon. Any assistance and suggestions will be appreciated.

Also, anyone running a woodmaster, if there are any other advice I can heed I would greatly appreciate it. I have read and watched utube videos so far. I am anxious to get going with the woodmaster. I also plan to modify the top while installing hinges on the hood so that the hood can just be leaned backwards instead of removing the heavy thing totally..

Thanks,

Jerry

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6 replies so far

View TopamaxSurvivor's profile

TopamaxSurvivor

17676 posts in 3143 days


#1 posted 06-07-2011 03:01 AM

The wire should be #8 copper. You might get lucky and get it to start with a 40 map breaker, but it may take one as high as an 80 amp to get it to start. Good luck.

-- 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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Grandpa

3256 posts in 2142 days


#2 posted 06-07-2011 03:27 AM

I agree with the #8 wire for the 40 amp breaker. You are looking to start a fire with this project. I am not sure what they figure but it is something like 10 amps to the horse power. You really should check the book on the amps for the motor and also the wiring. Don’t worry us like that.

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klassenl

170 posts in 2126 days


#3 posted 06-07-2011 04:36 AM

I looked in my Canadian code book and it suggests that a 7.5hp 1 phase motor at 240V will draw 40 Amps. So according to code a #6 wire would be required with a breaker of 100A max. This is theoretical of course, it’s always better to look at the nameplate on the motor or to take a reading when the motor is running to find the real current draw.

-- When questioned about using glue on a garbage bin I responded, "Wood working is about good technique and lots of glue........I have the glue part down."

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,

2387 posts in 3014 days


#4 posted 06-07-2011 05:20 AM

Thanks for the info guys. I will look further into this before i go to far because i dont need any fires. Thanks again.

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TopamaxSurvivor

17676 posts in 3143 days


#5 posted 06-07-2011 07:10 AM

klassenl Those Canadian breakers must not be a strong as American breakers. My Sq D motor calculator only calls for 80 map. The devil made me do it and I just couldn’t resist ;-))

-- 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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,

2387 posts in 3014 days


#6 posted 06-10-2011 05:09 AM

I think i will go to a 6/3 wire with 50 amp breaker. I want to be safe.

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