Select the best answer to complete each statement, and place...

Select the best answer to complete each statement, and place the letter of your answer in the space provided.
An antishort bushing is used on __________
a. armored cable.
b. surface metal raceway.
c. EMT.
d. nonmetallic cable.
e. rigid metal conduit.

Key Concepts

Electrical Wiring Installations

Electrical wiring installations involve the selection and proper installation of cables, conduits, and related accessories in a manner that meets safety standards and regulatory codes. This includes using protective components such as bushings, connectors, and conduits to secure and safeguard the wiring system against physical damage, ensuring reliable performance and compliance with electrical safety regulations.

Cable Bushings

Cable bushings are protective devices installed at the points where cables interface with metal hardware or sharp-edged openings. Their primary purpose is to prevent the insulation on cables from being damaged by abrasion or cutting, which could lead to short circuits or safety hazards. They ensure reliable operation by reducing wear and extending the life of the cable system.

Conductor Insulation Protection

Conductor insulation protection is a critical aspect of electrical installations that prevents damage to the insulating material covering the conductive wires. Exposure to sharp metal edges or abrasive surfaces can strip or compromise the insulation, leading to short circuits and potential fire risks. Measures such as the use of bushings or other protective devices help maintain the integrity of the insulation.

Nonmetallic Cables

Nonmetallic cables, commonly referred to as NM cables, use flexible, nonmetallic sheathing that provides basic physical protection and insulation for the conductors inside. However, because the sheathing is relatively thin compared to metallic cable constructions, these cables are especially vulnerable when they pass through sharp-edged openings in metal fittings or enclosures. As a result, protective devices like bushings are often required to ensure safe installation.

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