Grounding a Partner Switch...

[sirach]

We have been kicking around a theory that many of the troubles we respond to that tend to be difficult to isolate might just be related to a lack of proper grounding. Many of the switches encountered in the field (That others installed)that are not grounded to the terminal coming out of the CPU module seem to have strange problems. Does anyone know whether this is a signal ground, which is seperate from a chasis ground? Meaning, does the three prong power plug actually ground the switch or should their be a seperate ground for it? Could anyone explain why this is the case. Thanks as always!

 

[telprog]

If there is a ground lug on a system then it is there for a reason, use it. Some systems do not have this lug and do not need it as the plug does it.
I'm a firm believer in grounding systems that are equipped for it.
Well that's my two cents worth.
And you are right when power goes out then comes back on it will have a little spike in front of it and it can cause weird little problems. They should also have a surge protector in front of the system if they don't have a ups.

 

[Mongo5150]

But make sure if you buy a UPS thast it has power filter built in. Some battery back ups do not. Most APC units do. Good luck

 

[durangoace]

I prefer to have both protection 9e.g. TowerMax) and a UPS with brownout protection (AVR). This is cheap insurance. By all means ground your system if there is a ground lug.