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Old August 9, 2012, 01:07 PM
westom westom is offline
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Quote:
Originally Posted by taimoorali007 View Post
Okay, got it but m asking for UPS also that can give backup without any issue and protection also during AC power, or still first i have to fix wiring for protection?
Do you want hardware protection? Or do you want temporary power during a blackout? Each is a completely different anomaly. Nothing solves both.

If a UPS does hardware protection, then a manufacturer spec numbers that says so is posted. The only UPS number for protection is near zero. Just enough above zero so that naive consumers will recommend it as 100% protection. In reality, protection already inside appliances is better.

Your concern is an anomaly that can overwhelm existing protection. That was stated, quite bluntly, by one who has actually done this stuff professionally. You asked about hardware protection. That means earth ground - for all two wire and three wire buildings.

Any recommendation without numbers should be ignored as an example of knowledge from myth and advertising. Stick to your original problems. And understand that any claim devoid of manufacturer spec numbers and well proven science is best ignored. You are paying too much attention to and being confused by posts that are obviously irrelevant to your original problems. Posts based in popular urban myths because spec numbers and necessary facts are missing. Have only confused you. Defined from the beginning is what every post must discuss to answer your original concern:
Quote:
1) Wall receptacle safety ground is for human safety (and will help eliminate noise due to leakage currents). 2) Earth ground is required for human safety and also does transistor safety. Those are for voltages that may be tens, hundreds, or thousands of volts. 3) A ground that is common only to interconnected appliances addresses the ground loop problem or other similar noise (leakage) problems. That ground is for voltages that are single digit or less. That create noise; not harm to hardware or humans.