Considerations for mounting the bus bar are bus bar weight, system vibration, ease of assembly, enclosure restraints and field maintenance. Insulated thru-holes in the bus bar are most common for mounting. Depending on need, alternative methods include a separate mounting bracket or even cable ties with eyelets. When using insulated mounting holes, the hole in the conductor needs to be larger than the mounting hole diameter in order to accommodate the insulating washer, and placed a minimum of 0.030" from the conductor edge.