1What are the two basic mounting types of conventional circuit breakers?
Snap in and bolt in
2Are circuit breakers time delay overload devices?
Time delay
3What is the major advantage of a breaker over a fuse?
Can be reset
4What are five reasons for a circuit breaker to trip?
Overload, short circuit, weak breaker, bad wiring connections, internally broken
5Can circuit breakers be used for switches?
No, not unless marked "SWD"
6A circuit breaker that trips occasionally indicates what kinds of possible problems?
Overloads, wake breaker, bad wiring connections
7How can you utilize a clamp-on ammeter to troubleshoot a circuit breaker problem?
Check amp draw to see if the problem is a short circuit or an overload
8How does a shunt trip breaker work?
Has a magnetic shunt that when energized trips the breaker off
9Shunt trip breakers nust be used with what kind of switching device-- normally open or normally closed?
Normally open
10Name two applications where shunt trip breakers are often used?
Fre system, electric deep fryers
11How does a GFI breaker work?
It compares the amperage out of them breaker on the hot line and compares it to the return current on the neutral. If the difference exceeds 5 ma, it trips the breaker off.
12Where do the hot line and neutral from the receptacle get connected when using a GFI breaker?
To the breaker
13How does AFCI arc fault breaker work?
It senses arcing in the circuit and trips the breaker if an arc results
14Most weak circuit breakers are a result of what problems?
Overheating, bed wire connections on the breaker, using the breaker for a siwtch