Miter Saw Trips Breaker

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Forum topic by Redoak49 posted 12-21-2020 01:12 PM 602 views 0 times favorited 5 replies Add to Favorites Watch
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5421 posts in 3278 days

12-21-2020 01:12 PM

Topic tags/keywords: miter saw breaker trip

My son is having a problem with his DeWalt DW716 miter saw tripping the breaker. He has a SquareD QO panel and is using a 20 amp breaker. He brought his saw over and we checked the amps. The max at startup is 32 amps and running is 12 amps. It did not trip my breaker which is the same size and brand.

My 10” Ryobi only is 24 amps max.

My suggestions to him was to try putting a new breaker in and see what happens.

I was doing some Googling and found this is something people have run into with their miter saws. One option mentioned is to use a HM series breaker which stands for high magnetic. This seems to have helped many people. Has anyone here done this and did it help?

Any other suggestions for this problem?

5 replies so far

View Jake229's profile


87 posts in 692 days

#1 posted 12-21-2020 01:37 PM

I have the same saw in my shop. Also have the QO panel running 20 amp breakers. I used 20 amp GFCI breakers and have had no problems with blowing breakers. Is the saw “well used”? May want to look at the brushes. Worn brushes could increase start up amps. Just a thought. Put what you find out here please. The problem tweaked my curiosity.

-- Be safe out there

View Robert's profile


4798 posts in 2770 days

#2 posted 12-21-2020 02:22 PM

No problems here, either 15A Bosch slider. I would put in a new breaker first.

-- Everything is a prototype thats why its one of a kind!!

View mike02719's profile


306 posts in 5075 days

#3 posted 12-21-2020 02:23 PM

In my working life (long ago) I was an electrician. In those days, circuit breaker trip points were all over the map. Starting current is much higher than running current so I would advise plugging the miter saw in a different receptacle. This may eliminate a common problem such as additional load on the suspect breaker. Also check the plug on the saw and the receptacle itself. GFCI breakers and receptacles are often in some state of failure. I hope I have helped you with this problem.

-- Mike, Massachusetts

View AMZ's profile


346 posts in 679 days

#4 posted 12-21-2020 03:06 PM

I had the identical problem with a DW715 earlier this year. After having the breaker pop about a half dozen times, before messing with anything else, I replaced the circuit breaker and the problem stopped.

View bugradx2's profile


354 posts in 1309 days

#5 posted 12-21-2020 03:12 PM

I agree on checking the brushes on the saw.

I would also go one step further than mike02719 and look at everything that’s on that circuit. If you know for sure it’s just the saw then I would want to know why it pulls so much that it flips the breaker. It shouldn’t be doing that. I bet you’ve got something else on the circuit pulling a load. A couple homes ago, I used to do stuff in the garage and found the house was wired with a lot on one circuit because I would flip the breaker occasionally operating saws. Our current house, we built from the ground up and builder raised an eyebrow at me when I insisted on some extra circuits in a few places. I told him I was a woodworker and he understood from that point on. Of course this was the same conversation where my wife wanted an outlet in our master bathroom closet so she could keep a little vacuum in there to vacuum up her long hair from the floor. The dude looked at her like he’d just solved all of life’s problems and said he was going to put one in his master bathroom that weekend for his wife!

-- The only thing not measured in my shop is time

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