HP Performance Optimized Datacenter 20c User Guide - China

Glossary 82
fuse, branch circuit type
A fuse of Class CC, G, H, J, K, L, R, and T. These fuses are able to provide branch circuit protection.
fuse, supplementary type
Miscellaneous type and miniature type fuses. These fuses are able to provide supplementary protection only.
overload protection
Protection required for motor circuits that will operate to prohibit excessive heating due to running overloads
and failure to start.
PDU
power distribution unit
PLC
programmable logic controller
PPE
personal protective equipment
RU
rack units
structure
Enclosure of sufficient size to enable entry of personnel.
UL
Underwriters Laboratory
UPS
uninterruptible power system