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Site Wiring Fault/Normal Issue

APC UPS for Home and Office Forum

Schneider Electric support forum for our APC offers including Home Office UPS, Surge Protectors, UTS, software and services and associated products designed to share knowledge, installation, and configuration.

Solved
even_apc
Cadet
0 Likes
5
158

Site Wiring Fault/Normal Issue

This was originally posted on APC forums on 7/31/2014


Hi,

I had a issue on the site wiring fault.

First, I had two UPS in the server room, when connected to socket, both of the site wiring fault LED will light up.

The issue solved after check by electrician and installed a ground wire to server room on May 2014

One 29 July 2014, one of the UPS site wiring fault LED light up again.

From the log, I can see that the site wiring fault  happen and become normal within few seconds.

It keep repeating the behavior for few hours, and stop.

After a period (within 5-6 hours), it happen again.

I really have no idea why is the issue happen again, it work fine before.

Anyone can help?

Thanks


Accepted Solutions
BillP
Administrator Administrator
Administrator
0 Likes
0
159

Re: Site Wiring Fault/Normal Issue

This reply was originally posted by Angela on APC forums on 8/1/2014


Hello again,

Regarding a loose ground, I was referring to a physically loose or unstable connection either in the receptacle or upstream where it connects to your panel in the building.

If you let the fault keep happening, it could interfere with the ability for the UPS to deal with a surge and shunt it to the ground (but it should ultimately sacrifice itself before your equipment) and it would also avoid any possible Equipment Protection Policy (but I think that only applies to the USA actually where we have that).

See Answer In Context

5 Replies 5
even_apc
Cadet
0 Likes
0
159

Site Wiring Fault/Normal Issue

This was originally posted on APC forums on 7/31/2014


Hi,

I had a issue on the site wiring fault.

First, I had two UPS in the server room, when connected to socket, both of the site wiring fault LED will light up.

The issue solved after check by electrician and installed a ground wire to server room on May 2014

One 29 July 2014, one of the UPS site wiring fault LED light up again.

From the log, I can see that the site wiring fault  happen and become normal within few seconds.

It keep repeating the behavior for few hours, and stop.

After a period (within 5-6 hours), it happen again.

I really have no idea why is the issue happen again, it work fine before.

Anyone can help?

Thanks

BillP
Administrator Administrator
Administrator
0 Likes
0
159

Re: Site Wiring Fault/Normal Issue

This reply was originally posted by Angela on APC forums on 7/31/2014


What type of UPS is this? Do you have a model number?

Assuming a Back UPS or Smart UPS, the typical reasons behind it are loose or missing ground, reversed polarity, and overloaded neutral. The stuff that sounds like it could come and go are the loose ground and overloaded neutral.

Do you know the cause of it last time and what the electrician addressed? I would think you may need to have him/her come check it again while the site wiring fault is active since you did indeed have this issue before.

even_apc
Cadet
0 Likes
0
159

Re: Site Wiring Fault/Normal Issue

This was originally posted on APC forums on 8/1/2014


Hi Angela,

The one with fault is APC Smart UPS – 2200.

The one without any issue is APC Smart UPS – 1500.

Last time, the electrician just installed ground wire and the problems was solved.

I really cannot understand why is the fault happened again.

What do you mean by loose ground?

Anyway, what is the worst case if I just let the fault happening?

Thank you for your time reviewing my issue.

BillP
Administrator Administrator
Administrator
0 Likes
0
160

Re: Site Wiring Fault/Normal Issue

This reply was originally posted by Angela on APC forums on 8/1/2014


Hello again,

Regarding a loose ground, I was referring to a physically loose or unstable connection either in the receptacle or upstream where it connects to your panel in the building.

If you let the fault keep happening, it could interfere with the ability for the UPS to deal with a surge and shunt it to the ground (but it should ultimately sacrifice itself before your equipment) and it would also avoid any possible Equipment Protection Policy (but I think that only applies to the USA actually where we have that).

BillP
Administrator Administrator
Administrator
0 Likes
0
159

Re: Site Wiring Fault/Normal Issue

This reply was originally posted by Angela on APC forums on 8/1/2014


I know we do not here in North America and I have never heard of us doing that in any other region so my "gut" tells me the answer is no. embarassed