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Please clarify my doubt in APC HI800sq is working fine with normal and battery mode, when mains on i checked the battery terminal with tester, the light is up and no shocking, but when in battery mode i cant touch the battery wires or battery lead, if i am touching the battery terminal i am getting shocking,

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SOURCE: Ground Wire is testing as hot

Assuming you are in the United States, the convention with 120 volt ac circuits is that the Black is HOT, the White Neutral, and Green is Ground. Assuming your tester is a neon type light suitable for 120 volt ac circuits, the tester will illuminate when the tester leads touch the black hot and the white neutral, and also when the tester leads touch the black hot and the green ground. the tester should not illuminate when the leads simultaneously touch the white neutral and the green ground. It appears from your description that Your circuit description is operating correctly.. Surprise? ... your tentative assertion "when I touch the black hot wire and the copper ground wire with the tester. This is should not happen, correct?" this assertion (YOURS) is wrong, rather, it would be correct for it to illuminate between the black hot and the green(you say bare copper) ground. It sounds to me, if you need to ask this question, "YOU SHOULD NOT BE FOOLING AROUND WITH LETHAL 120 VOLT HOUSE VOLTAGES AND CURRENTS" I strongly recommend you should hire a licenced electrician. Besides getting electrocuted, you could set fire to the HOUSE, and maybe not when you are looking but when you are asleep, or away from home. PLEASE BE FORWARNED. thank you. Regards --- GooseBay_Camper

Posted on Sep 28, 2009

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Plug the battery backup into a working electrical outlet. If the battery backup turns on when the power button is pressed, then the problem may be that the previous electrical outlet is faulty. Proceed to step three. If the battery backup doesn't turn on, proceed to step two.
  • 2 Reset the circuit breaker on the battery backup. APC battery backups have a labeled circuit breaker button located on the unit near the phone line, fax line, USB, network and coaxial cable inputs. Press the button to reset the circuit breaker. Power on the battery backup by pressing the power button. If the battery backup powers on, proceed to step three. If the battery backup doesn't turn on, proceed to step six.

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  • 3 Determine if the battery backup is charged and providing battery power. With the battery backup on and plugged into a working electrical outlet, plug a computer monitor into one of the battery backup outlets labeled "battery backup plus surge protection" on the battery backup. (APC power supplies have some outlets that provide only surge protection while the other outlets provide surge protection plus battery backup.) Turn the monitor on. Unplug the battery backup power cord from the wall outlet. If the monitor remains on, the battery is holding a charge, supplying electrical power and the battery backup is working properly. If the monitor goes off, proceed to step four.
  • 4 Charge the battery. Plug the battery backup into an electrical outlet and allow the battery to charge for 16 hours. This will fully charge the battery.
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  • 6 Replace the battery backup unit. The unit itself is faulty. If the battery backup is under warranty, contact APC to request a replacement.
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