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Forum topic by WorksInTheory posted 02-17-2018 10:39 PM 3627 views 1 time favorited 33 replies Add to Favorites Watch
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WorksInTheory

143 posts in 1717 days


02-17-2018 10:39 PM

I see that many people have success using electrical outlets w/ remote control on/off to activate their DC and even w/ the Harbor Freight DC.

I have the HF DC and it doesn’t blow the circuit where it’s plugged in now. I don’t know if it’s 15 or 20A circuit. However when I plug in the remote control outlet, turning on the HF DC immediately blows the fuse. I figured, okay it’s probably 20A and the outlet is 15A fuse so I went to an electronics store and bought a 20A fuse and came home and opened up the little unit and replaced the fuse with the 20A.

But when I plug it in and turn on the HF, again it immediately blows the fuse? The guy at the electronics store said this should work and prevent blowing. I don’t know what I did wrong but if it’s a 20A fuse and it doesn’t blow a 15A or 20A circuit then why would it blow this fuse?

FYI – it’s a slow blow fuse so it supposed to allow for that high initial pull.

If I can’t figure out the fuse thing, is there something wrong with bypassing the fuse in the plug?

Thanks.


33 replies so far

View Fresch's profile

Fresch

302 posts in 2036 days


#1 posted 02-17-2018 11:24 PM

Put the same rated fuse back in and return it as it is defectiv, the remote, the fuse did what it was designed to do.
Never put a higher rated fuse in!

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clin

919 posts in 1111 days


#2 posted 02-17-2018 11:25 PM

First off NEVER, NEVER, NEVER replace a fuse with one rated higher than is supposed to be in something. NEVER!

The fuse is there for a reason. The problem is NOT that the fuse blows. The problem is what is causing the fuse to blow. You can always put in a large enough fuse so it won’t blow. But at that point, why have a fuse at all?

And yes bypassing the fuse is a bad idea. Again, it’s blowing for a reason. Either the switch is defective in some way, or you are simply drawing too much current. Maybe your DC is defective. Just becasue it doesn’t blow your breaker means almost nothing. A breaker is not a fuse, and there are significant variations between identical fuses and breakers. The ratings are nominal.

You might even have a defective breaker and it should be tripping. It happens.

If you are blowing a 20 A, slow-blow fuse quickly, you are drawing a lot more than 20 A.

Are you sure the remote switch is appropriate for this application. You say others do the same thing, but are you using the same make and model of remote switch?

I’m not much help I know, but you really want to get to the root cause of this, and not simply put on a bigger band aid.

-- Clin

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WorksInTheory

143 posts in 1717 days


#3 posted 02-17-2018 11:46 PM

The breaker trips as I have tripped it before when starting 2 machines. But understood – breaker and fuse not the same thing.

If you search the forums here tons of people are using remote switches, christmas light remote switches etc with the same DC – the Harbor Freight fake 2HP one and they all say it works like a charm so was really surprised that it was popping the outlet.

After putting new fuse in, tested it with a shop Vac in another outlet and it worked. Moved it back to the outlet the DC was on but used the Shop Vac and it worked. The DC blew it. Removed the remote control outlet and plug DC directly into outlet – works.

As you probably figured out by now, I know nothing about electrical stuff. Thanks for your advice thus far and to come.

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patcollins

1687 posts in 2980 days


#4 posted 02-17-2018 11:55 PM



The breaker trips as I have tripped it before when starting 2 machines. But understood – breaker and fuse not the same thing.

If you search the forums here tons of people are using remote switches, christmas light remote switches etc with the same DC – the Harbor Freight fake 2HP one and they all say it works like a charm so was really surprised that it was popping the outlet.

After putting new fuse in, tested it with a shop Vac in another outlet and it worked. Moved it back to the outlet the DC was on but used the Shop Vac and it worked. The DC blew it. Removed the remote control outlet and plug DC directly into outlet – works.

As you probably figured out by now, I know nothing about electrical stuff. Thanks for your advice thus far and to come.

- WorksInTheory

Does the switch in the DC have some sort of slow start feature in it that prevents a big initial rush of current because if it does and it is just always switched on so the remote can turn it on that would be why there could be a big inrush of current that isn’t there when you just plug the DC in and use its switch to turn it on and off.

Could also be your DC draws high current for some reason such as having builtup debris in the blower, or it could be that outlet it is in has wiring problems ie not a properly wired outlet.

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WorksInTheory

143 posts in 1717 days


#5 posted 02-18-2018 12:06 AM

I don’t know if the wiring is an issue, like I said everything else works on that outlet properly. It might have a slow start feature, it’s not quite instant on, there is a wind up.

I could try to plug the whole set up to another outlet, just weary of keep blowing more fuses – didn’t get that many.

View TheFridge's profile

TheFridge

10090 posts in 1601 days


#6 posted 02-18-2018 12:13 AM

I’ve seen breakers trip before fuses blow.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

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patcollins

1687 posts in 2980 days


#7 posted 02-18-2018 12:16 AM



I don t know if the wiring is an issue, like I said everything else works on that outlet properly. It might have a slow start feature, it s not quite instant on, there is a wind up.

I could try to plug the whole set up to another outlet, just weary of keep blowing more fuses – didn t get that many.

- WorksInTheory

In the electrical sections of hardware stores you can find a plug that goes into an outlet, it has three lights on the back of it to display if the outlet is wired correctly or not. They cost about $5, I find mine very useful.

View Mike_D_S's profile

Mike_D_S

482 posts in 2329 days


#8 posted 02-18-2018 12:58 AM

Unless they’ve changed them, the switch on the HF DC is just a switch.

I think it’s probably one of two things:
1. The remote switch is defective. Try plugging some other piece of machinery into the switch and see if you still trip the breaker.

2. You are on the border of tripping the breaker all the time with the DC and are just barely sneaking by. With the extra power draw of the switch, that’s just enough to put you over the limit for the breaker.

There is a potential that the problem is your specific circuit. Try using an extension cord to another outlet in your house.

Mike

-- No honey, that's not new, I've had that forever......

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InstantSiv

262 posts in 1710 days


#9 posted 02-18-2018 01:06 AM

I did research on this years ago so my info might be wrong? From my memory the HF dust collector can pull more than 20amps at startup, something like up to 22 or 23 amps. I think 20amp fuse is not enough and why it blew.

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Mike_D_S

482 posts in 2329 days


#10 posted 02-18-2018 01:12 AM

Ok I realize after the last post that I probably mis-read the OPs situation.

I thought they were tripping the breaker, but it seems like the fuse in the remote is tripping? In that case, then InstantSiv is on the right track as my measurements showed the HF DC definitely drawing more than 20 amps at startup for 1 or 2 seconds until the fan gets up to speed.

Mike

-- No honey, that's not new, I've had that forever......

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WorksInTheory

143 posts in 1717 days


#11 posted 02-18-2018 01:24 AM

Hey Mike yes I tested #1 and it works so not defective device.

#2 could be it but somehow others on this forum have it working with the same DC so not sure why specifically I am blowing the fuse.

View johnstoneb's profile

johnstoneb

2999 posts in 2288 days


#12 posted 02-18-2018 02:13 AM

Everything works correctly until you plug in the remote. I would think the remote might have a problem

-- Bruce, Boise, ID

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WorksInTheory

143 posts in 1717 days


#13 posted 02-18-2018 05:30 AM

but the remote outlet works for all other stuff fine

Aside from searching on this site and seeing plenty of examples of this working, I can see on youtube examples also such as this one: https://www.youtube.com/watch?v=T-PoY2J12m0

I may just give up and get a foot pedal or something or I will just need to do the walking back and forth to turn it on.

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WorksInTheory

143 posts in 1717 days


#14 posted 02-18-2018 08:07 AM

Okay I think am going to try using this remote w/ a contactor so that the high power is going through the contactor and low power through the remote to trigger the contactor.

View jonah's profile

jonah

1834 posts in 3413 days


#15 posted 02-18-2018 01:13 PM

The remote clearly isn’t rated for 20A. You’re trying it with other too,s that draw a lot less than 20A, and of course it works with those. You need a remote rated for 20A. Do not replace fuses with higher capacity ones, ever.

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