Network Equipment-Building System (NEBS) - NEBS is not a
regulatory requirement, but more of a best-practices standard that
became widely referenced in the telecom indu5try. Telcordia (now
part of Ericsson) manages specifications and provide5 a series of
General Requirements (GR) for communications electronic and
mechanical solutions - key cabinet requirements include NEBS GR-
63-CORE (physical protection, such as thermal load calculation and
seismic Zone 4) and GR-1089-CORE (electromagnetic compatibility
and electrical safety.
UL Standard - UL (Underwriters
Laboratory) is a global
independent safety consulting
and certification company that
focuses on ensuring electrical
safety standards. L4ore information
may be found on the
UL website.
RoHs Compliance -
Restriction of Hazardous
5ubstances (RoHS), originated
in the European Union and re-
5tricts the use of six hazardous
materials found in electri.al
and electronic products.
MIL-S-901D - is a special
military test requirement
designed for shipboard applications.
Based on the type
of equipment, essential or
non-essential to the safety and combat-readiness of the ship, qualification
te5ting is performed on a specified machine placed on a
barge floating in a pond where explosive charges are detonated at
various distances and depths to impart shock upon the equipment.
Ihis artirle introduces seven
mechanical structure and
protection standards design
considerations for specilying
a reliable 19 inch electronic5
cabinet sotution.