Service installation overhead and underground
When an existing three-phase service is replaced, a phase wire from the new energized service is matched to the proper phase wire from the existing energized service when a voltage reading between them is _______ volts.
0
Identify the numbered connectors in the following illustration by choosing the correct number in the dropdown next to each connector name.
1-* ''5'' Parallel groove 2-* "1" Spring action 3-* "2" Split bolt 4-* "3" Straight lug 5-* "4" Sleeve
The general rule for placing conductors in a connector when a copper wire and aluminum wire are being connected is _______ over _______.
1-* Aluminum 2-* Copper "A over C"
Choose the correct answer(s) Which of the following are factors that should be considered when selecting a connector to make a service connection?
1-* Application 2-* Wire size 3-* Wire type
Match the name of the type of conductor in the left-hand column with abbreviation on the right-hand column.
1-* Copper- CU 2-* Aluminum- AL 3-* Aluminum conductor, steel reinforced- ACSR 4-* All aluminum alloy conductor- AAAC 5-* All aluminum conductor- AAC 6-* Galvanized steel- GALV ST
Choose the correct answer(s) A back feed test involves making three voltage checks. Select the three test locations from the list below.
1-* Neutral terminal to load terminal 2-* Neutral terminal to other load terminal 3-* Load terminal to load terminal (Back feed will flow from the Load side)
When wires are prepared for a connection, a copper wire is brushed until it is _______ while an aluminum wire is brushed until it is _______.
1-* Shiny 2-* Dull
Identify the connectors listed below by selecting ''M'' in the dropdown next to each one that is a mechanical connector and ''C'' in the dropdown next to each one that is a compression connector.
1-* Sleeve ''C'' 2-* Split bolt "M" 3-* Straight lug "C" 4-* Single-bolt, parallel groove "M" (bolted) (BOLTS are MECHANICAL)
Testing for _______ shorts is done by testing for voltage from either of the line terminals to one of the load terminals in the customer's meter box.
Phase-to-ground shorts
True/False Ring cutting is the recommended method of skinning the insulation from a conductor.
False
True/False When a three-phase service is installed, the neutral is connected after the three phase wires have been connected and the phase sequence has been checked.
False
True/False Customer back feed voltage checks are always made at the line terminals and at the neutral terminal.
False
True/False For an underground service installation, it is best to connect the service to the meter box terminals before filling in the trench.
False, wires can pull out of meter
A _______ test should not be made at a customer's meter box unless the other two tests have been made and any problems found during those tests have been corrected.
Jumper
Before a service installation job is begun, an important first step is to...
Look over the job site
After a new three-phase service has been connected in parallel with an old three-phase service, the old service can be disconnected from the circuit. The last service wire to be disconnected is the.....
Neutral
When service wires are connected, the _______ is always connected first.
Neutral
Select in order the basic steps for making a service connection.
Step #1- Skin the wire (remove the wire's insulation) Step #2- Clean the wire (brush with a wire brush) Step #3- Install the connector Step #4 Tape or insulate the connection
True/False When a three-phase service is installed, one of the energized service phase wires is permanently connected, while the other two are temporarily connected to the service entrance phase wires until the phase sequence can be checked.
True
True/False When connections are made to an energized pad-mounted transformer, it is a good practice to cover up all terminals except for the terminal being worked on.
True