1
give 2 examples of overcurrent protection
fuse and breaker
how are overcurrent protection devices rated
amps
what happens to a fuse when it blows
the link overheats and melts
give the 2 most common types of breakers
single pole and double pole
The best way to avoid an arc flash
De-energize the circuit
opens a circuit in case of an overload, ground fault, short circuit, or arc fault
give 2 types of plug in fuses
type S and Edison base
what is the difference between an open and closed circuit
an open circuit has no path for electron flow and a closed circuit does have a path for electron flow
give 2 types of cartridge fuse
ferrule and knife blade
The ratio that a ladder should be away from a building to how high it extends
1/4 - for example, if a ladder extends 16' up, it should be approximately 4' away from the building at the base
in general where do GFCI receptacles need to be used
wet or damp areas
What rooms must be protected by an AFCI breaker
any room that you can sleep in
give 2 types of arc faults
series and parallel
as little as ___ of ____ can trip a GFCI
5 milliamps
call this number before digging
811
what does PASS stand for when talking about fire extinquishers
Pull
Aim
Squeeze
Sweep
Describe what an A,B,&C fire extinguisher would be used for
A - anything that creates and ash
B - anything that comes in a barrel
C - electrical - think of current
What is the difference between a service entrance panel and subpanel when terminating the neutral and ground conductors?
In the Service entrance panel they can be on the same bar and in a subpanel they can’t
list the 2 types of flexible metal conduit
armored cable and metal clad cable
ditches deeper than ______ must be shored
5'
what causes a short circuit
an unintended path between an ungrounded conductor and a neutral conductor
what causes a ground fault
an unintended path between an ungrounded and grounded conductor
An electrical arc caused by current flowing through an unintended path is the definition for ____________
arc fault
What 2 things do you match with an overcurrent protection device to assure everything in the circuit is sized correctly
When is fall protection required?
when working within 6' of an unguarded edge on a surface greater than 6' above the ground