Rack Mount and System Grounding

[mmarker2001]

I RTFM and there is no mention of this issue.

Is the 19" rack mount for the NCP500/1000 adequate grounding for the system if the rack itself is fully grounded or do I need to install a separate ground to the system's ground screw?

TIA!

 

[obtsystems]

It will depend on the code in your country
Itu rack/system will have paint or powder coating and would not give a proper ground but if you ground the system to the rack ground it should be ok

Here a lot of systems are not grounded separately at all

 

[mmarker2001]

This system is in Palm Springs, California USA

Powder coated rack? Hmmm... <scratches head>

 

[obtsystems]

Powder coating is a paint technic that used powder sprayed on to the metal and baked in a oven to harden.

 

[cwc3]

rule of thumb is scratch off an area with powder coat is and drill a hole and attach a lug with a machine screw a flat and a lock washer and nut and use some green thhn 12 awg ground both the rack and the phone system to same grounding spot or telco ground !!

 

[mmarker2001]

Thanks, cwc3.
It's an NCP system that has static on all 4 trunks. The lines test clean so it points to the system. Static is on both digital and IP phones.
The system has no ground wire attached which is why I wonoered about adequate grounding through the rack mount frame.
They will try a separate ground wire and then move to replace the system if grounding does not help.
(fyi - this was not my install) <wink>

 

[obtsystems]

Can't see a ground cleaning up that. Is there static on internal calls

 

[cwc3]

like obt says grounding wont cure static on lines .if you dont have a spare co card to swap out !got a spare analog ext OR a fax line or a dialtone from another provider or even a magic jack for test purposes ? frog it over to line one position on 4 co card grab line 1 IS THERE STATIC?