Make a Test Lamp For this project, you will make a test lamp, a device used to test continuity in a.

Make a Test Lamp

For this project, you will make a test lamp, a device used
to test continuity in a powered circuit. To make the lamp, you will need a
simple light socket with lead wires and a short extension cord. You will find the
test lamp very useful, but you cannot easily buy this device in a store. When
you are done making it, keep it as part of your troubleshooting toolkit.

1. Separate the two wires of the extension cord by about 3
inches approximately 2 feet from the plug end.

2. Cut the wire connected to the wide blade of the plug in
the middle of the separated section. Do not
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Make a Test Lamp

For this project, you will make a test lamp, a device used
to test continuity in a powered circuit. To make the lamp, you will need a
simple light socket with lead wires and a short extension cord. You will find the
test lamp very useful, but you cannot easily buy this device in a store. When
you are done making it, keep it as part of your troubleshooting toolkit.

1. Separate the two wires of the extension cord by about 3
inches approximately 2 feet from the plug end.

2. Cut the wire connected to the wide blade of the plug in
the middle of the separated section. Do not cut the other wire.

3. Strip both ends of the cut wire and insert the light
socket into the cord circuit using twist connectors to join the wires of the
socket to the ends of the cut cord wire. You can connect either socket wire to
either end of the cut cord wire.

4. Cut off the plug end of the cord and separate the two
wires by a length of 6 inches.

5. Strip the insulation off both wire ends by one-half inch
and twist the wire strands in each wire tightly so they will not fray out.

6. When completed, test your lamp. Tape one end of the cord
to the table and keep the other end separate from it.

7. Put a light globe in the socket and plug the cord into an
outlet.

8. Touch the loose wire lead to the taped one. If the test
lamp was correctly made, the lamp will light. This shows it is a complete
circuit.

9. You can test any circuit by touching the wire leads of
the test lamp to points on the two sides of the circuit. If the lamp lights
(even dimly) the circuit is complete (has continuity) and current is fl owing
through it. The test light is wired in series with the rest of the circuit, so
it may light brightly if resistance in the circuit is low, or dimly if
resistance in the circuit is high.

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