Sizes range from 12″ -12″ -12″ up to 48″ -60″ -48″. The 48-60-48 are capable of 576+ core fiber cables. iber handholes are used to provide access to the underground duct or innerduct during cable installation and provide storage space for slack cable and splice closures. Familiarity with fiber optic cable requirements, practices. Handholes are shallow chambers constructed inground to access telecom cables/components with your hands. But what exactly are handholes? Why are they important in fiber optics and electrical infrastructure?PPC's cylindrical and rectangular fiber handhole assemblies are designed for subsurface Fiber to the “x” (FTTx) applications in light-duty outdoor environments. The covers are designed for skid resistance and locking mechanisms to prevent accidental opening.