Fuse blowing every couple of months - page 2.

nc50lc

legendary

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Quote from: deskless on April 17, 2019, 09:20:51 AM

-snip-

Low quality or even wrong type of wires and connections can have a lot of resistance mainly because of the current that flows in it had exceeded the limit.
When it happens, the wires will heat up and will cause the fuse to break because it is designed to "pop" before a circuit overload happens.

Since you're not an expert and there's certainly a problem, I suggest you to seek a professional to check-up your wiring.

deskless

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Quote from: nc50lc on April 17, 2019, 12:05:13 AM

Quote from: deskless on April 16, 2019, 02:32:03 PM

It is happening while rig is on for several days. The fuse is old style one time use.

Have you checked the wiring for faulty connections and ratings? (ex. 12gauge+ wires for 20A) The most obvious signs are thin-looking wires in the circuit or bunch of "rat-tail" connections; if there's a problem, the wire or the connections will heat up and will "pop" your fuse.
If you're not qualified to do so, call for a professional electrician to do the job.

There's no other reasons for this other than faulty wiring since it's happening too often to be caused by a bad fuse, otherwise, frequent power outage.

I am not expert in it. However how can a lower quality wire burn the fuse. Every time I noticed that fuse was burned badly. Why the "wire or the connection will heat up" will cause "pop the fuse". Can you please explain?
Thanks a lot for your help.

shiming

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Depending on your load, the size of the fuse used is no problem. If the fuse is always burned, it may be a problem with the fuse quality, or the circuit cable is aging, the temperature rises, and the current will increase. You need to check the line.

nc50lc

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Quote from: deskless on April 16, 2019, 02:32:03 PM

It is happening while rig is on for several days. The fuse is old style one time use.

Have you checked the wiring for faulty connections and ratings? (ex. 12gauge+ wires for 20A) The most obvious signs are thin-looking wires in the circuit or bunch of "rat-tail" connections; if there's a problem, the wire or the connections will heat up and will "pop" your fuse.
If you're not qualified to do so, call for a professional electrician to do the job.

There's no other reasons for this other than faulty wiring since it's happening too often to be caused by a bad fuse, otherwise, frequent power outage.

vmozara

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Quote from: deskless on April 16, 2019, 02:32:03 PM

It is happening while rig is on for several days. The fuse is old style one time use.

There are several reasons what could be:

1. Your fuse is bad quality, or it is wrong rating
2. There was a power outage, or several power outages at short time. Current surge at both PSU powerups exceed the current rating and blows the fuse.
3. Load is more than what you think
4. Your PSU is going bad.

For point 1. It is possible your fuses are bad rating. Verify that it really is 20A fuse.
For point 2. When you power on the PSUs, especially 2 of them at the same time, there is massive current surge (2-5x more than rated) for very short period of time. In my opinion this is the most likely reason for your issues, that there was outage of power and then it blew up. Check if your fuse has a SNAIL marking on it (slow-blowing fuse, or delayed action fuse, what ever is the name, there will be a snail or letter T (timed) or letter L (lag) next to 20A rating)
3. Maybe your rigs lose some power optimizations after some time and run the cards overvolted. Very unlikely considering you would need more than 2.2KW of load to blow the fuse.
4. Very unlikely considering you experience this every few months

igotek

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Online Security & Investment Corporation

use a good fuse

Legrand and Siemens are the best

deskless

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Quote from: gt_addict on April 16, 2019, 04:05:48 PM

Quote from: deskless on April 16, 2019, 02:32:03 PM

Quote from: vmozara on April 16, 2019, 11:06:09 AM

Is the fuse blowing when the rig starts (for example, after power outage) or in normal use?

What kind of fuse you have, is it automatic circuit breaker or old type one-time-use fuse?

It is happening while rig is on for several days. The fuse is old style one time use.

have you checked logs or anything to see if a mining program is restarting causing a power surge on warmed up household cables?

Good point.
I will also bring down load by 2A to see if that stays good

gt_addict

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Quote from: deskless on April 16, 2019, 02:32:03 PM

Quote from: vmozara on April 16, 2019, 11:06:09 AM

Is the fuse blowing when the rig starts (for example, after power outage) or in normal use?

What kind of fuse you have, is it automatic circuit breaker or old type one-time-use fuse?

It is happening while rig is on for several days. The fuse is old style one time use.

have you checked logs or anything to see if a mining program is restarting causing a power surge on warmed up household cables?

ZombieWorm

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Can you plug into a different 20a socket and see? There may be a flaw somewhere in your loop/spur and its warming up over time - doesn't sound great.

deskless

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Activity: 279

Merit: 1

Quote from: vmozara on April 16, 2019, 11:06:09 AM

Is the fuse blowing when the rig starts (for example, after power outage) or in normal use?

What kind of fuse you have, is it automatic circuit breaker or old type one-time-use fuse?

It is happening while rig is on for several days. The fuse is old style one time use.

vmozara

member

Activity: 190

Merit: 59

Is the fuse blowing when the rig starts (for example, after power outage) or in normal use?

What kind of fuse you have, is it automatic circuit breaker or old type one-time-use fuse?

deskless

jr. member

Activity: 279

Merit: 1

I have one rig which keeps blowing fuse every other month. Load is around 1550 wattage(12.5A). I am using 20A socket. Two PSU together 1850 is being used in the rig. 10 cards of mixed 570 and 580.

Any suggestions?

Topic: Fuse blowing every couple of months - page 2. (Read 418 times)