10 Questions
What happens when the current rating of a fuse is exceeded?
The metal strip heats up and melts.
Which type of fuse is considered unsafe due to its interchangeability regardless of rating?
Edison-base plug fuse
In what scenarios are time delay fuses particularly useful?
For handling overloads for a fraction of a second
What is the purpose of an overcurrent protection device's Overcurrent Rating?
To determine its amperage limit under specific conditions
Why are Edison plug fuses no longer allowed in new and retrofit installations?
Their interchangeability causes improper protection
What is the Interrupting Rating requirement for circuit breakers and fuses based on the provided text?
5,000 A and 10,000 A respectively
What is the difference between Nonmetallic-Sheathed Cable (NM) and Nonmetallic-Sheathed Cable (NMC)?
NMC has conductors encased in the sheathing while NM does not
What distinguishes Underground Feeder (UF) cables from other types of cables mentioned in the text?
UF cables are suitable for direct burial applications
What distinguishes Service Entrance (SE) cable from Underground Service Entrance (USE) cable?
SE cable is suitable for exposed above-grade conditions
How can Armored Cable be classified based on the insulation type of the conductors?
AC if the insulation is thermoplastic and ACT if the insulation is rubber
Learn about fuses, which are overcurrent protection devices in electrical circuits. Discover how fuses work by using a strip of metal with a low melting temperature to interrupt current flow when the current rating is exceeded. Explore the importance of replacing blown fuses with new ones of the same rating.
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