Dust Collection Electrical Problem

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Blog entry by rockinmichael posted 04-01-2012 11:27 PM 10947 reads 1 time favorited 14 comments Add to Favorites Watch

I recently purchased a Shop Fox 1.5 hp Dust Collector. It claims to only draw 15 amps, but directly hooked up to a 15 amp outlet, it trips. The nearest 20 amp outlet is 15 feet away and with a 15 foot extension cord (12 guage), it still trips. However it does work directly hooked up to the 20 amp, but it is then too far away from the tablesaw, planer and other tools. Installing 220 volt isn’t an option. Any suggestions?

14 comments so far

View BillyJ's profile


622 posts in 4536 days

#1 posted 04-02-2012 12:43 AM

Do you have any open spaces in your breaker box that will allow for another 20 amp run?

Not wanting to be too nosy, why not rewire the motor for 220v and run a 220 line? That would definitely solve your problem.

-- I've never seen a tree that I wouldn't like to repurpose into a project. I love the smell of wood in the morning - it smells like victory.

View MoshupTrail's profile


304 posts in 3814 days

#2 posted 04-02-2012 12:51 AM

Does it trip when starting? Or after it’s been going a while?

-- Some problems are best solved with an optimistic approach. Optimism shines a light on alternatives that are otherwise not visible.

View DIYaholic's profile


19921 posts in 4008 days

#3 posted 04-02-2012 01:11 AM

Could the 15A breaker be old or defective?

-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procrastination a bad thing?

View Grandpa's profile


3264 posts in 4009 days

#4 posted 04-02-2012 02:22 AM

What does the manufacturer recommend? That is where to start. Then remember the inrush when starting the motor. You might need to have a 30 amp if the breaker trips on the motor start up. How far from the breaker is the receptacle located. Amperage is lost on long runs. This could be the problem. Are you sure the wiring is 12 gauge in the wall to the receptacles. Some electricians use 14 gauge wire when it is a short run. this was never intended for something like a dust collector motor.

View Luke's profile


546 posts in 4627 days

#5 posted 04-02-2012 03:30 AM

Where’s the video?

-- LAS,

View Pete_Jud's profile


424 posts in 5086 days

#6 posted 04-02-2012 06:36 AM

Might have a bad cap at the motor if it’s only on the start. 15 amp draw on a 14 wire would not trip the breaker. I know that my 2 hp Jet is on a dedicated 20 amp outlet. But has never tripped the breaker.

-- Life is to short to own an ugly boat.

View Dick, & Barb Cain's profile

Dick, & Barb Cain

8693 posts in 5633 days

#7 posted 04-02-2012 07:48 AM

I’d install a new 20 Amp breaker, the starting surge is too much for a 15 Amp breaker. Also you may have other things running on the same circuit.

Also. it wouldn’t hurt any to install a new 20 Amp outlet , they have better contacts

-- -** You are never to old to set another goal or to dream a new dream ****************** Dick, & Barb Cain, Hibbing, MN.

View Scot's profile


344 posts in 4729 days

#8 posted 04-02-2012 08:46 AM

This one is kind of a no brainer. You have a DC that the manufacturer states that it draws 15 amps, and when you try to start it the 15 amp breaker trips….I kind of have to throw out a big DUH on this one. The DC is fine, your circiut is not sized correctly for the DC.
You need to run it on a 20 amp circiut with #12 wire.
Do not swap out the 15 amp breaker for a 20 amp until you verify the wire size. Chances are that if it’s a 15 amp breaker then it’s most likely #14 wire which is undersized for 20 amps.

Some of the Shop Fox tools do not have the newer more efficient motors on them and have a pretty substantial in rush on them. Are you sure that the extension cord is #12 and was any thing else on the 20 amp circiut besides the DC ?

The DC is generally a piece of equipment that you would want on a dedicated circuit.

-- If the old masters had power tools, they would have used them. So get off your damn High Horse.

View Dick, & Barb Cain's profile

Dick, & Barb Cain

8693 posts in 5633 days

#9 posted 04-02-2012 09:02 AM

Also check, & see if your electrical service is at full voltage. I burned out 2 table saws before I found out my service transformer was too far away. The power company moved the transformer closer, it solved my problem. You could also have too many homes being served by an undersized transformer. Amps go up when the voltage drops.

-- -** You are never to old to set another goal or to dream a new dream ****************** Dick, & Barb Cain, Hibbing, MN.

View Sanity's profile


176 posts in 4023 days

#10 posted 04-02-2012 12:19 PM

I have the Shop Fox 1.5 HP cyclone DC and had the same problem. I upgraded the circuit breaker to 20 amps.

-- Stuart

View JJohnston's profile


1622 posts in 4624 days

#11 posted 04-03-2012 01:20 AM

Before you get into your circuits, you might try making up a big, thick python of an extension cord instead of the 12 gauge you’re using now.

-- "A man may conduct himself well in both adversity and good fortune, but if you want to test his character, give him power." - Abraham Lincoln

View Ken22F's profile


23 posts in 4597 days

#12 posted 04-03-2012 03:03 AM

This is what to do:
Look in the breaker box and check if the wire on that circuit is 12ga. if it is
Install a 20amp breaker and replace all the outlets in that circuit to 20amp.

That’s it!


View roundguy's profile


62 posts in 4018 days

#13 posted 04-03-2012 03:42 AM

Is there anything else on that circuit, like a refrigerator?

View timothyee's profile


17 posts in 3560 days

#14 posted 04-23-2012 03:03 AM

A 15 amp breaker is not big enough for a 15 amp motor due to heat, resistance, startup, etc. even if nothing else is on that line. There are formula’s to figure wire size and breaker size. Like Ken22F said, check your wire size making sure it is 12 ga., install 20 amp breaker and make sure all the other recipticles are rated at 20 amps. You shouldn’t have any problems then. Just remember if there are other recepticals you still may not be able to run something else while the dust collector is on. If I remember correctly the NEC says a 20 amp should be rated/loaded only to 80% of it’s capacity which would be 16 amps. It doesn’t mean it won’t run more, that’s just the safty code.

-- timothyee, Florida,

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