Troubleshoot The Wiring Problems
Some problems with wiring
systems can be traced to the use of improper materials in the wiring devices.
Therefore, the use of proper materials in the installation stage is a form of
preventive maintenance, decreasing the likelihood of problems later. Shock
hazards should be minimized by the dielectric strength of the material used for
the molded interior walls and the individual wire pocket areas. Each molded
piece has to support adjacent molded pieces to result in good resiliency and
strength. Nylon seems to be the best for this job. Nylon devices withstand high
impact in heavy-duty neoprene, urea, or phenolic materials.
Damage can be invisible and
cause direct shorts and other hazards. Nylon also has the ability to withstand
high voltages without breaking down. Tables detail the properties of materials commonly
used in wiring devices.
In troubleshooting wiring
problems, it is important to check that switches have been wired
properly. Figure shows wiring diagrams for switches in various systems. Plugs
and connectors must also be wired and grounded correctly. Figure shows the grounding
systems used in connecting various plugs to a circuit.
 |
| Wiring diagrams for switches in various systems |
In some troubleshooting
situations, the electrician will be called upon to trace wires. Most multi-wire
cables have color-coded conductors. Follow the color code to identify the same
conductor at each end of the installation. When installing a wiring system, make
a list of the color-coded conductors and where each terminates. This makes
future troubleshooting easier.
Test for wire pairs using an
ohmmeter. Short two wires together on one location and use an ohmmeter at the other
end to test for continuity. Then mark with colored tape or a number label.
Chemical Resistance of Materials Commonly Used in Wiring Devices:
|
Chemical
|
Nylon
|
Melamine
|
Phenolic
|
Urea
|
Polyvinyl Chloride
|
Polycarbonate
|
Rubber
|
|
Acids
|
C
|
B
|
B
|
B
|
A
|
A
|
B
|
|
Alcohol
|
A
|
A
|
A
|
A
|
A
|
A
|
B
|
|
Caustic bases
|
A
|
B
|
B
|
B
|
A
|
C
|
C
|
|
Gasoline
|
A
|
A
|
A
|
C
|
A
|
A
|
B
|
|
Grease
|
A
|
A
|
A
|
A
|
A
|
A
|
B
|
|
Kerosene
|
A
|
A
|
A
|
A
|
A
|
A
|
A
|
|
Oil
|
A
|
A
|
A
|
A
|
A
|
A
|
A
|
|
Solvents
|
A
|
A
|
A
|
A
|
C
|
C
|
C
|
|
Water
|
A
|
A
|
A
|
A
|
A
|
A
|
B
|
A—Completely
resistant; good-to-excellent, recommended for general use.
B—Resistant;
fair-to-good limited service.
C—Prone to slow
attack; not recommended for use.
 |
| Materials Commonly Used in Wiring Devices |
Read More:
- Electrical Troubleshooting For General Problems
- Fluorescent Lamp Troubleshooting Guide
- Reduce Glare in Lighting Installation
Final Word
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