Module 10
The interrupting rating of an FH-type circuit breaker is
65,000 A
The Organizations that tested and listed circuit breakers is/are
CSA and UL
The two most common types of over current protective devices are
Circuit breakers and fuses
Which of the following is defined by UL as a device that trips when a fault current to ground is 6mA or more
Class A
Circuit breakers are grouped for identification according to
Given current ranges
Which of the following types of drawings helps when sizing fuses for a given application
Single line Schematic
What name is given to the time-current relationship among a number of over-current devices connected in series
coordination
In residential applications, the available ground fault circuit current is seldom higher than
10,000 A
What color is printed on the labels or standard interrupting capacity circuit breakers
Black
Cartridge fuses used for branch circuit protection must be marked with the Ampere rating, voltage rating and the
Interrupting rating
Which type of GFCI receptacle offers protection only at the point of installation
Non-feed through type
The normal current rating of a circuit breaker is located
On the handle
NEC Article 240 covers the following
Over current protection
Why are single-Element fuses particularly suited for the protection of circuit breakers with low interrupting ratings
They have high speed of response to over currents
A current limiting circuit breaker preforms in a manner similar to conventional thermomagnetic circuit breakers at currents below a threshold of about
1000a
