An electrician's hickey is primarily used for what purpose?

An electrician's hickey is primarily used for bending metallic conduit. This tool allows electricians to create precise bends in metal conduit, which is essential for ensuring that electrical wiring can be routed effectively while maintaining a clean and safe installation. The ability to bend conduit accurately is crucial because it allows the electrician to navigate corners and obstacles without compromising the integrity of the electrical system or the conduit itself.

Other tools and methods exist for the remaining options, such as using a multimeter for measuring resistance, various installation tools and techniques for cable installation, and different types of wrenches or pliers for tightening cable connections. However, the specific utility of an electrician's hickey is its designated function in bending conduit, making it an essential tool for that particular job in electrical work.