The mesh design allows for a direct read when conducting
infrared hotspot detection (limitations such as geometric
condition will affect the accuracy of readings). The open
design also permits rain to wash off the insulator below.
It is often preferred when a visual inspection of bolted
connections is required.
The solid or unperforated design provides better
protection by completely isolating energized components.
Fully enclosed components are also less prone to
colonization, hoarding, and nesting attempts.