The cartridge fuse. Fuses part 3

Рет қаралды 49,158

Күн бұрын

I describe the use and design of the non motor load cartridge fuse. How it works What it is used for.
This video is part of the heating and cooling series of training videos made to accompany my websites: www.graycoolingman.com and www.grayfurnaceman.com to pass on what I have learned in many years of service and repair. If you have suggestions or comments they are welcome.
If you are a homeowner looking to repair your own appliance, understand that the voltages can be lethal, the fuels are highly flammable and high pressures are used. Know your limits.

Пікірлер: 31

@seemorebutts3428 2 жыл бұрын

Thank you for this video. I am just going to add to it to help other homeowners since it is old and the only one that I can find. It won't "burn in two" like you said, the metal will melt from high heat created by more resistance than it can handle. But some times, the metal in these fuses gets old and won't transmit or allow as much amperage flow even though you get a proper voltage reading. It's like with water, you can have 100 psi (pounds per square inch) build up through a pinhole. But you will not have as much volume through a pinhole as a 1" diameter pipe.

@bobheck7303 6 жыл бұрын

You are just as good for homeowners! Great Gray Guy!

@Milosz_Ostrow 7 жыл бұрын

Yes, those cartridge fuses are available in ratings larger than 60 amperes. My parents owned a house built in the mid-1950s that had a couple of large, 70A cartridge fuses for the mains protection.. Since they were installed in a Cutler-Hammer enclosure rated at 100A with appropriately sized bus wiring to the sub-panel containing the branch circuit breakers, dad eventually replaced them with 100A cartridge fuses, as he got tired of replacing burned-out fuses. Nowadays, I would consider replacing the mains fuses with a dual circuit breaker, since the fuses can cost $18-$20 each and a major overload event on a 220V appliance circuit that blows both fuses could end up costing $40, whereas it would just be a minor inconvenience having to reset a tripped breaker.

@meizou8187 4 жыл бұрын

more fuse body material as melamine , vulcanized fiber , epoxy fiberglass tube on fusestube.com,wellele.com

@Progrocker70 3 жыл бұрын

70 amp and up cartridge fuses are physically larger than the 35-60 amp variety, and they use flat blades on each end that clip into the holders. I had a place with two 100 amp main fuses. Never blew either one but I never had any large loads or appliances on the service, major appliances were all natural gas.

@grayfurnaceman 11 жыл бұрын

Sounds probable to me. Thanks for the comment. GFM

@gergemall 2 жыл бұрын

Excellent content

@projectartichoke 2 жыл бұрын

There are multiple small areas (weak points) inside a fuse for short-circuit protection. Under a typical over-current event one of them will open, but under a short circuit all of them will open and and arcing will fuse the sand into glass which is an excellent insulator and will extinguish the arc.

@jolyonwelsh9834 2 жыл бұрын

That silica powder is an arc extinguishing medium. When the fuse opens (always under an overload) the sand fills in the void as the element burns extinguishing the arc. This is why fuses are capable of interrupting higher available fault currents than circuit breakers. They can't put that sand inside a circuit breaker for obvious reasons. If you haven't noticed, fuse have a higher available interrupting rating (A.I.R.) than breakers.

@healer378 3 жыл бұрын

Thank you.

@adambeckham8552 3 ай бұрын

Does the small one have to be put in a certain way my friend has them kind it takes two for each breaker

@grayfurnaceman 3 ай бұрын

They can be installed either way. GFM

@protagorastar1220 3 ай бұрын

@grayfurnaceman I have a question. If this type of fuse were to blow, would that cause "clicking" noises in your home? Have you ever heard of someone having little periodic clicking noises going on in their homes? I'm guessing it's electrical, all the appliances and anything electronic also experiences little pops every now and again. Thoughts and help please?

@grayfurnaceman 3 ай бұрын

I have no idea on this one. GFM

@qaisarhosanee2915 2 жыл бұрын

Is that what we call a fuse type gG?

@EnergyFabricator 11 жыл бұрын

I think they have more than one weak spot to evenly distribute the current across the fuse. This way, the heat is more evenly distributed throughout the fuse. If there was only one weak spot, it could overheat prematurely and alter the current carrying capacity of the fuse, bringing it out of spec. Just my guess...

@TheZantiago2000 7 жыл бұрын

Do you think i can replace a cartridge fuse and wiring with a automotive fuse? Cartridge fuse is off a old 4 wheeler.

@infinityhighway5092 6 жыл бұрын

You must be a wild man for even thinking of doing something like that dude.... Listen, get back in the box before they notice... You've gone WAAAAAYYY too far this time, and you're losing it, BIG-TIME... If anyone ever tries to tell you to replace a cartridge fuse with an Auto fuse, ever again, Just kindly Refuse, and step away, back into the box....Ok?.... Lol, Simple answer; If it conducts a current, and that current is adequate to run the thing that you wish to run, without burning up the fuse to failure, then it sounds like you in business. Just don't stick a 100 amp fuse in a 10 amp slot if you've already burned through your 15,20,30,40, and 50 amp fuses on the same circuit, one after an other immediately after powering on the device... Something else is wrong and pushing too much juice at your power supply. A fuse doesn't act as a resistor does in limiting the amount of current from supply to load, thereby protecting the load from too much energy while maintaining function, instead, a fuse is just designed to withstand a specific level of heat (essentially) that is relative to a particular working amperage maximum. If it gets too much power, it gets too hot, and dis-integrates itself at it's weakest point.... JUST REFUSE THE TEMPTATION DAMNIT!!!! ;-)

@meizou8187 4 жыл бұрын

more fuse body material as melamine , vulcanized fiber , epoxy fiberglass tube on fusetube.com,wellele.com

@andrewgarratt5191 3 жыл бұрын

Is there like a 2 or 3 time use cartridge fuse?....mine went out,I took it out flipped it around...did not expect for it to work! But prayed hard because it’s New Year’s Eve everywhere is closed! Miraculously it’s working !? I don’t understand how this is possible.

@grayfurnaceman 3 жыл бұрын

I can't explain it other than to say perhaps your problem was not the fuse. GFM

@andrewgarratt5191 3 жыл бұрын

@@grayfurnaceman well thank you very much for the quick response.... Now that I’m not mad any more I realize I could have just ran an extension cord to a working outlet for the fridge until places re-open. “Duh!” I cant make heads or tails of it ether. The people who lived here before were on drugs and played with the wires ALOT 😏 knock wood though!,3 years and the house has not burned down yet 😅 Hope you have a great New Years! And thanks again for such a fast response.

@antoinetteshaw6130 2 жыл бұрын

replacing a 60 amp cartridge fuse for Air conditioning.. when I put the cartridge holder back in it quickly gave electrical connection sound

@nextplease518 11 жыл бұрын

Maybe there is three so that when it blows, you can see which side of the load made it blow? Just a guess tho

@matthewwood4154 5 жыл бұрын

The sand is to quench electrical arcs when the element melts (i.e., fuses). Here is the description from Fuseco's site: "Current limiting fuses contain a granular filler, usually high purity quartz sand of a defined grain size and packaging density. The specific grain size distribution provides room to expand for the vapours and gases produced by the arc and offers a large surface for efficient cooling. The filler does melt under the influence of high arc temperatures, absorbing an enormous amount of energy and extinguishing the arc well before current zero. Fused quartz and metal form a non-conductive fulgurite body that prevents re-striking of the arc."

@grayfurnaceman 5 жыл бұрын

Good info, thanks GFM

@meizou8187 4 жыл бұрын

more fuse body material as melamine , vulcanized fiber , epoxy fiberglass tube on fusestube.com,wellele.com