Inductants/ground faults?

Could that be the famous plastic grounded electrical boxes that we've heard sooooo much about in the group??

ADI is carrying a ground wire transient device which prevent s ground wire induced spikes it very pricy from what i have seen $300+

You can get a plastic junction box with a ground terminal at Home Hardware for under two bucks... You even get a choice of colours. Goose-shit Gray, or Banana Yellow.

Nope. Entirely different "animal"... but probably equally effective... :-))

The old relay control panels which were not grounded did not have problems of this nature. Then electronic panels came along and these problems occurred.

What you can do is use an isolated power supply (DC output not grounded) to power a loop along with a relay. (Relay contacts go to electronic control panel.) Then when door contacts open/close, the relay opens/closes as well. Basically you are isolating the building wiring from the electronic control panel.

What this does is two things.

1. More current is flowing through the wiring, so it is much less sensitive to induced current such as caused by nearby lightning strikes. (Direct strike, forget about it.)

1. When you have a retail business with an aluminum front glass/door frame system and a customer attempts to enter the business after closing (thinking the business is still open), they will sometimes place a lot of force and "vibration" on the *locked* front door. This vibration can make a door contact momentarily open and close. Some electronic controls will notice the brief opening of the contact and trigger an alarm. A relay will require a longer "open" of the circuit before it will trigger an alarm. Also you can add a small value electrolytic capacitor to the relay for an additional delay. A full second of delay time may be required to stop these types of false alarms. (Symptoms of this trouble are retail store with aluminum front glass/door system, and frequent false alarms shortly after closing time.)