Module 10 Part 2 Flashcards
Electrical equipment in the OR must be _______ through a ______ wire
Grounded
Third
T/ F
There is no direct electrical connection between the power supplied by the utility company on the primary side and the power induced by the isolation transformer on the secondary side
True
T/F
A person in contact with only one of the two lines in an IPS system will receive a shock by completing the circuit
False, The person must be in contact with both lines 1 and 2 to complete the circuit. the ground is not part of the circuit
T/F
A faulty piece of equipment plugged into an isolated power system, may have a partial short circuit, but will not usually trip the circuit breaker
True
This type of device continuously monitors the integrity of an isolated power system
Line isolation monitor
A line isolation monitor measures the ______ to the ground on each side of the isolated power system
Impedance
Faulty equipment plugged into an IPS can change the system to a ______ system
Grounded
T/F 
If faulty equipment is plugged into the IPS it will continue to function normally but the LIM will alert that power is no longer ungrounded
True
What should you do if the line isolation monitor alarms?
Check the line isolation monitor reading and if possible unplug the last device that was plugged in
LIM Meter indicates how much current would flow in the event of a first fault and it’s set to alarm at _____
2-5 mA
In the event of a second fault with an isolated power system what can result?
Shock
What does GFCI stand for?
Ground fault circuit interrupter
How does a GFCI work?
It does not measure current but will trip and cut power when leakage current to ground exceeds a predetermined value in a grounded system-
Aka it monitors the difference in flow between two sides of the circuit and if a difference is detected the powers immediately interrupted
How do you prevent a second fault (the dangerous fault)?
Address the first fault by unplugging devices until you find the damaged equipment or issue that needs to be addressed
What does the first fault mean?
The first fault means that the line isolation monitor has detected that isolation from the ground has been degraded beyond a predetermined limit, a second fault may cause a shock
T/F
All electrical equipment should be tested periodically by trained personnel
True