101 Basic Series - Module 10 - Post Assessment
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1
A commercial/industrial service entrance panel is supplied with the same power system as a residential panel.
2
Serves as an extension of the incoming power cables (main service conductors) and provides a means of affixing branch circuit breakers.
3
Half size branch circuit breakers are designed to take up only half as much space in a loadcenter as a normal circuit breaker, but cannot just be installed 2 for 1 in any loadcenter.
4
Serves as a protective barrier to prevent contact with energized ('hot') parts within the unit.
5
A 240-volt circuit typically consists of four wires. They are:
6
The power to a _________________ usually comes from a branch circuit breaker in the service entrance panel.
7
On a Main Lug Only loadcenter, turning one of the branch circuit breakers to the OFF position, will stop power flow to the bus bars and other branch circuit breakers.
8
Flush mounting is usually applied in industrial applications where the loadcenter is attached to and projects from the wall.
9
The term used to describe a loadcenter used at the point where the power enters the building is a ____________.
10
Double-pole circuit breakers plug-in to ______ stab(s) and feed ______ volts.
11
Regardless of ampere ratings, a "Lighting and Appliance" type of loadcenter is limited to 42 circuits in one enclosure.
12
Feed-Through Lugs are a set of terminals in a service entrance panel where feeder cables to a distribution panel are connected.
13
A device used to divide power and protect branch circuits from overloads and short circuits is called a loadcenter.
14
One reason for the intentional grounding of electrical equipment is to lower the impedance of the ground path. In the event of a fault, this serves to ________ the current, allowing the overcurrent device to open ________.
15
For safety reasons, the National Electrical Code (NEC) requires the service entrance panel's neutral to be grounded. Any downstream panels have their neutral _______ and _______.
16
A residential service entrance panel is typically used to supply lighting, receptacles and appliances in a home.
17
Main service conductors (Mains) bring electricity into a building from the power source.
18
A NEMA Type 1 enclosure:
19
The ____________ is where the main upstream circuit protection device has an interrupting rating equal to or greater than the available fault current of the system and downstream devices have lower ratings.
20
Most homes have ______ amp service, and a 120/240V, single-phase, three-wire system.