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NCT4
Network Tech 4 Module 5
9
Communication
Professional
02/01/2015
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Term
60-90 VAC
 Definition
voltages used by power supplies
Term
Batteries provide ____ hours of backup power
 Definition
3
Term
batteries should be inspected every
 Definition
3 to 6 months
Term
torque each battery connection to
 Definition
60 inch pounds
Term
differences in battery volatge should not exceed
 Definition
.3 VDC
Term
Group 31
 Definition
size of batteries used in power supply, 70lbs
Term
batteries shouls be replaced after
 Definition
2 years
Term
If a batteries voltage remains above 34VDC for five minutes, of if it drops below at all
 Definition
re apply utility power
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