CR4® - The Engineer's Place for News and Discussion®


Previous in Forum: Air Receiver   Next in Forum: Cutting Force & Clamping Force Calculation Require
Close
Close
Close
21 comments
Guru
Engineering Fields - Mechanical Engineering -

Join Date: Sep 2009
Posts: 1657
Good Answers: 70

Underwriters Laboratories (UL) Fuse Question

10/08/2015 8:23 AM

Are there any UL experts here? I have been told by my co-workers that we are required to use a cheap plastic clam-shell inline glass fuse holder by UL for our project. Problem is it feels cheap and the glass fuses are very costly.

I have looked into the automotive style blade fuses but I am told that they are SAE certified and not necessarily UL certified. The blade fuses are at a much lower cost and we would prefer to use them.

Does anyone know of blade fuse holders and fuses that are UL listed? Or at least explain why they are not.

Drew K

__________________
Question: What is going on with the American's Government? Response: Who is John Galt?
Register to Reply
Pathfinder Tags: fuses UL Underwriter Laboratories
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Comments rated to be Good Answers:

These comments received enough positive ratings to make them "good answers".
4
Guru

Join Date: Oct 2008
Posts: 39901
Good Answers: 1588
#1

Re: Underwriters Laboratories (UL) Fuse Question

10/08/2015 10:03 AM

I don't know, but...........Wiki do

OptiFuse - New UL Listing of Automotive Blade Fuses

Register to Reply Good Answer (Score 4)
Guru
United States - Member - Hobbies - Fishing - New Member Hobbies - Target Shooting - New Member Hobbies - RC Aircraft - New Member Engineering Fields - Aerospace Engineering - New Member

Join Date: May 2009
Location: On the road, USA
Posts: 2164
Good Answers: 68
#4
In reply to #1

Re: Underwriters Laboratories (UL) Fuse Question

10/08/2015 1:06 PM

Man Lyn, seems you've pissed somebody off again to be voted OT! Anyhow, I tried to over-ride the OT. Nice find and as the Britt's would say, "Spot On" the subject!

Have a good one

Dan

__________________
Confucius once said, “ Ability will never catch up with the demand for it".
Register to Reply
Guru

Join Date: Oct 2008
Posts: 39901
Good Answers: 1588
#5
In reply to #4

Re: Underwriters Laboratories (UL) Fuse Question

10/08/2015 2:03 PM

Thanks.

As I say in my signature line, "The supply of fools will always outstrip the demand."

Register to Reply
Guru
Technical Fields - Project Managers & Project Engineers - New Member

Join Date: Aug 2006
Location: Midwestern United States
Posts: 830
Good Answers: 73
#8
In reply to #4

Re: Underwriters Laboratories (UL) Fuse Question

10/08/2015 5:12 PM

Indeed, currently at 1 to the plus. So, let's knock it all the way. GA

__________________
Reuters - Investigators found that the recent thread derailment in CR4 was caused by over-weight creatures of lore and request that membership DON'T FEED THE TROLLS.
Register to Reply
Guru

Join Date: Oct 2008
Posts: 39901
Good Answers: 1588
#9
In reply to #8

Re: Underwriters Laboratories (UL) Fuse Question

10/08/2015 5:21 PM

Thanks.

Interestingly enough, I cannot see what the vote count is for my own threads.

No one can see this for their own threads. We can see it for everyone else's though.

Register to Reply
Guru
Safety - Hazmat - New Member Engineering Fields - Retired Engineers / Mentors - New Member Engineering Fields - Piping Design Engineering - New Member Hobbies - DIY Welding - New Member Fans of Old Computers - PDP 11 - New Member

Join Date: Feb 2007
Location: Stronger Than The Storm
Posts: 2367
Good Answers: 201
#17
In reply to #9

Re: Underwriters Laboratories (UL) Fuse Question

10/10/2015 11:19 PM

Don't know who the fool is but it isn't me. You got my GA!

Good Luck, Old Salt

__________________
Any day on the green side of the grass is a GREAT DAY!, --- me +++++++++. I believe creativity is an inherent part of everyone. --- Kermit T. Frog
Register to Reply
Guru
Engineering Fields - Mechanical Engineering -

Join Date: Sep 2009
Posts: 1657
Good Answers: 70
#6
In reply to #1

Re: Underwriters Laboratories (UL) Fuse Question

10/08/2015 2:55 PM

Honest, guv, I did google first! Now I just need to find an in-line fuse holder that UL likes...I would ask the UL guy, but it seems they charge by the word for any questions :-/

Drew K

__________________
Question: What is going on with the American's Government? Response: Who is John Galt?
Register to Reply
Guru

Join Date: Aug 2012
Posts: 938
Good Answers: 80
#2

Re: Underwriters Laboratories (UL) Fuse Question

10/08/2015 10:41 AM

No, but the relevant details are whether or not the manufacturer saw fit to get UL certification (which as you've discovered, simply certifies the samples tested meet the pertinent standards and really has nothing to do with actual quality or practicality), and this decision was likely made in view of the target market. So if the target market for the blade fuses is automotive and they may only require SAE certification, why bother with UL?

Just as a further note, here in Canada UL doesn't mean much, we would normally require CSA certification instead or cUL (don't know what the testing difference is from UL!).

Register to Reply
Guru
Engineering Fields - Electrical Engineering - New Member Fans of Old Computers - Commodore 64 - New Member Popular Science - Evolution - New Member United States - Member - New Member

Join Date: Oct 2013
Location: Illinois, 7 county region (The 'blue dot' that drags the rest of the 'red state' around during presidential elections.)
Posts: 3493
Good Answers: 87
#14
In reply to #2

Re: Underwriters Laboratories (UL) Fuse Question

10/09/2015 11:52 AM

"Just as a further note, here in Canada UL doesn't mean much, we would normally require CSA certification instead or cUL (don't know what the testing difference is from UL!)."

As a rough guess, I would say that CSA certification means it was tested by/on actual Canadians, while UL certification means you're simply taking the word of a bunch of 'Yanks' on it.

(I KNOW the Canadians have a derogatory word for Americans, which they would mutter behind the backs of the more moronic examples of our countrymen, but you guys are SO darned polite you never say it where it could be overheard. It's hard to do self-effacing humor if I don't know what insulting term to use on myself.)

__________________
( The opinions espressed in this post may not reflect the true opinions of the poster, and may not reflect commonly accepted versions of reality. ) (If you are wondering: yes, I DO hope to live to be as old as my jokes.)
Register to Reply
Guru

Join Date: Aug 2012
Posts: 938
Good Answers: 80
#16
In reply to #14

Re: Underwriters Laboratories (UL) Fuse Question

10/09/2015 11:54 PM

You're likely quite right! Sorry, meant to say the difference between cUL & UL.

PS- I think most of us Canadians just call you da.ned Yanks, but that just shows how original we aren't. We had to pick up something from south of the Mason- Dixon line to use instead, and probably as many Canadians know that bit as Americans know that the US didn't win the war of 1812.

PPS- my wife's grandfather is a very proper Bostonian, so you can guess what amusement we can get out of it all!!

Register to Reply
Guru
Engineering Fields - Mechanical Engineering -

Join Date: Sep 2009
Posts: 1657
Good Answers: 70
#18
In reply to #16

Re: Underwriters Laboratories (UL) Fuse Question

10/12/2015 7:42 AM

I thought the Canadians got Yank from the Brits who have been using it as a derogatory term for an American with too much head on his shoulders propped up by a large chip.

Most of the Canadians I have met seemed more European than American.

Drew K

__________________
Question: What is going on with the American's Government? Response: Who is John Galt?
Register to Reply
Anonymous Poster #1
#20
In reply to #18

Re: Underwriters Laboratories (UL) Fuse Question

11/05/2015 11:04 PM

Septics is a description used in the UK.

Register to Reply Score 1 for Off Topic
Guru
Engineering Fields - Mechanical Engineering -

Join Date: Sep 2009
Posts: 1657
Good Answers: 70
#21
In reply to #20

Re: Underwriters Laboratories (UL) Fuse Question

11/06/2015 8:05 AM

Um...I know. Used as in an even more derogatory context than just calling someone a yank.

Drew K

__________________
Question: What is going on with the American's Government? Response: Who is John Galt?
Register to Reply
Guru
Engineering Fields - Electrical Engineering - New Member Fans of Old Computers - Commodore 64 - New Member Popular Science - Evolution - New Member United States - Member - New Member

Join Date: Oct 2013
Location: Illinois, 7 county region (The 'blue dot' that drags the rest of the 'red state' around during presidential elections.)
Posts: 3493
Good Answers: 87
#19
In reply to #16

Re: Underwriters Laboratories (UL) Fuse Question

10/12/2015 10:20 AM

"Americans know that the US didn't win the war of 1812."

We weren't *IN* the war of 1812, that was when Napoleon tried to invade Russia and got his had handed to him in SHORT order. They even made a big song to commemorate the victory; it gets played at the end of our Independence Day celebration in DC.

Yes, we celebrate the birth of 'The Most Democratic of Democratic Nations' by playing a song that honors the victory of Imperialist Russia over the Democratic French. But who cares, it's a piece that has actual cannons written into the score. CANNONS! You know we yanks love to fire off guns, and the bigger/louder, the better.

(Yes I know there was a 'war of 1812' on American soil, but everyone remembers the '1812 Overture' and forget that you can have wars on two different continents in the same year. So this is mostly me putting on the hat with bells on it and dancing around to amuse. Although the irony of praising the Czar in song (which we do, the section used for A Capitol Fourth includes the Choir singing) as part of celebrating our own democracy is quite real, as well as the realization that most of the people out there on the lawn cheering on completely miss the point because they don't know what the 1812 Overture is about.)

(( and to be topical (which means this will be 'old and dated' next week) Happy Thanksgiving up there ))

__________________
( The opinions espressed in this post may not reflect the true opinions of the poster, and may not reflect commonly accepted versions of reality. ) (If you are wondering: yes, I DO hope to live to be as old as my jokes.)
Register to Reply
Guru
Engineering Fields - Power Engineering - New Member

Join Date: May 2007
Location: NYC metropolitan area.
Posts: 2995
Good Answers: 416
#3

Re: Underwriters Laboratories (UL) Fuse Question

10/08/2015 11:22 AM

It would help if we knew some more details like the Voltage and Current ratings, any particular time vs current requirements, are they there to protect the wiring and/or the device, etc.

__________________
Curious minds want to know, engineering minds get answers....
Register to Reply
Guru
Engineering Fields - Mechanical Engineering -

Join Date: Sep 2009
Posts: 1657
Good Answers: 70
#7
In reply to #3

Re: Underwriters Laboratories (UL) Fuse Question

10/08/2015 4:39 PM

We are seeing max amps of only about 2 amps on start-up and less than an amp when running. We have used 1.5 amp slow blow glass fuses without problems. The circuit board has current limiters (so says the EE guru we contract) that make it difficult to blow the delay fuses.

I want to use the blade fuses to reduce cost but my boss says we have to pay UL to review it to lower the cost...so if the reduction isn't enough we just keep making the customer pay until we feel like paying UL?

Drew K

__________________
Question: What is going on with the American's Government? Response: Who is John Galt?
Register to Reply
Guru

Join Date: Jun 2011
Location: Phnom Penh
Posts: 4041
Good Answers: 104
#12
In reply to #7

Re: Underwriters Laboratories (UL) Fuse Question

10/09/2015 6:34 AM

What sort of voltages are these fuses interrupting?

Those clam shells are normally on tail conductors...

__________________
Difficulty is not an obstacle it is merely an attribute.
Register to Reply
Guru
Engineering Fields - Mechanical Engineering -

Join Date: Sep 2009
Posts: 1657
Good Answers: 70
#13
In reply to #12

Re: Underwriters Laboratories (UL) Fuse Question

10/09/2015 8:04 AM

Sorry if I forgot to mention, 12V DC.

Drew K

__________________
Question: What is going on with the American's Government? Response: Who is John Galt?
Register to Reply
Guru

Join Date: Feb 2011
Location: 18N 65W o
Posts: 794
Good Answers: 24
#10

Re: Underwriters Laboratories (UL) Fuse Question

10/08/2015 6:45 PM

The "clam shell" type fuseholder only contacts the fuses on the ends of the fuse. This can cause the fuse to overheat and fail, not necessarily by an over load. Motorola used to have a fuse holder that had contacts that fit over the ends of the fuses. Contact your local two way radio shop, they may be able to assist. IIRC they came with a single piece of wire that was cut and spliced to the particular circuit.

Register to Reply
Guru

Join Date: Aug 2014
Location: 31°26'S 152°54'E Port Macquarie N.S.W. Australia
Posts: 875
Good Answers: 174
#11

Re: Underwriters Laboratories (UL) Fuse Question

10/08/2015 7:26 PM

Littlefuse make a UL248 compliant arc quenching blade fuse that may be acceptable.

According to my catalogue the one that likely best fits your requirements is a 3 amp unit part number 166.7000.430. Or a 4 amp one 166.7000.440.

Google the number and you should be able to access a datasheet.

Register to Reply
Guru
Popular Science - Weaponology - New Member Safety - ESD - New Member Hobbies - Fishing - New Member

Join Date: Sep 2006
Location: Near Frankfurt am Main, Germany. 50.390866N, 8.884827E
Posts: 17936
Good Answers: 196
#15

Re: Underwriters Laboratories (UL) Fuse Question

10/09/2015 4:18 PM

What voltages/currents are you wanting to fuse?

__________________
"What others say about you reveals more about them, than it does you." Anon.
Register to Reply
Register to Reply 21 comments
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Comments rated to be Good Answers:

These comments received enough positive ratings to make them "good answers".
Copy to Clipboard

Users who posted comments:

adreasler (2); Andy Germany (1); Anonymous Poster (1); dj95401 (1); Drew K (5); JavaHead (1); JNB (2); JWthetech (1); lyn (3); old salt (1); RAMConsult (1); spades (1); Wal (1)

Previous in Forum: Air Receiver   Next in Forum: Cutting Force & Clamping Force Calculation Require

Advertisement