MIL-STD-188-124B

Abstract

This standard establishes the minimum basic requirements and goals for grounding, bonding, and shielding of ground-based telecommunications C-E equipment installations, subsystems, and facilities including buildings and structures supporting tactical and long haul military communication systems. <br>This standard addresses the facilities ground systems, as well as grounding, bonding, and shielding and lightning protection for telecommunications C-E facilities and equipments. Grounding for building and structures is listed under the headings of Earth Electrode Subsystem, Fault Protection Subsystem, Lightning Protection Subsystem and Signal Reference Subsystem. <br>This standard shall be used in the design and engineering of new ground-based military communication systems, subsystems, and equipment installations as well as those C-E facilities undergoing major retrofit. This includes air traffic control and navigational aid facilities, radio, radar, satellite ground terminals, telephone central offices, microwave and data communications systems, as well as C-E transportables, aircraft simulators, computer centers, and weapon assembly facilities. When upgrading existing facilities for installation of minor C-E equipments, the requirements of this standard shall be established on a case-by-case basis by the cognizant engineering agency. Use of this standard for other ground C-E facilities or equipment is also encouraged. It is not to be used solely as the basis for retrofit of existing C-E facilities. It does not apply to general construction such as barracks, administration buildings, dining facilities, warehouses, and non-communications facilities, nor does it apply to mobile units such as tanks, trucks, jeeps, etc. <br>The objectives of this standard are to provide for the protection of personnel, equipments, buildings and structures against the hazards posed by electrical power faults and lightning strikes. It also provides for the reduction of noise and electromagnetic interference caused by inadequate grounding, bonding and shielding of ground based military communications installations to acceptable performance levels. It shall be required that the grounding, bonding, and shielding system be engineered to be compatible with the supplemental requirements of the specific equipment or facility supporting the communications. <br>The parameters and other requirements specified in this document are mandatory system standards if the word "shall" is used in connection with the parameter value or requirement under consideration. Non-mandatory design objectives are indicated by parentheses after a standardized parameter value or by the word "should" in connection with the parameter value or requirement under consideration. For a definition of the terms "system standard" and "design objective" (DO), see FED-STD-1037.