Quantcast Section 1: Codes and Policies

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Table of Contents -Cont.
Lightning Protection

Section 2: Systems

Section 1:
Scope.  This handbook presents data and considerations that are
necessary for the proper design of lightning protection systems.
Cancellation.  This handbook cancels and supersedes NAVFAC DM-4.6,
Electrical Engineering, Lightning and Cathodic Protection of December 1979.
Cathodic protection in DM-4.6 is to be covered in the proposed military
handbook, MIL-HDBK-1004/10.
Policies.  The policy of the Naval Facilities Engineering Command is
to provide the most effective degree of lightning protection.
Lightning Protection.  As a minimum, for all ordinary, non-ordnance
facilities requiring lightning protection, the requirements of National Fire
Protection Association (NFPA) NFPA 78, Lightning Protection Code, should be
followed.  The requirements of this handbook must be followed for ordnance
facilities and those facilities within the scope of NFPA 78.  Ordnance
facilities, such as magazines and other structures, truck and railroad
marshalling yards, railroad sidings, and wharves and piers where ordnance and
explosives are handled and stored, shall be provided with special protective
measures.  Design for these systems shall be in accord with criteria in this
handbook; DOD-STD-6055.9, Ammunition and Explosives Safety Standards;  MIL-
HDBK-419, Grounding, Bonding and Shielding; and NAVSEA OP-5, Vol. 1,
Ammunition and Explosives Ashore.
Local Codes.  Although the federal Government is not required to
conform to local (city or district) building and electrical codes for
installations within Government ownership lines, consideration should be given
to local standards and regulations wherever practicable.
National Codes.  The NFPA and the National Electrical Manufacturers
Association (NEMA) have established basic minimum standards of design and
installation practice including: NFPA 70, National Electrical Code (NEC);
NFPA 70B, Electrical Equipment Maintenance; NFPA 78; and American National
Standards Institute (ANSI) ANSI C2, National Electrical Safety Code.  These
standards shall be complied with in all projects.  Approval of the
Underwriters Laboratories Inc. should be considered for all electrical
materials, fittings, and appliances where possible.  Refer to Underwriters'
Laboratory (UL) UL 96, Lightning Protection Components, UL 96A, Installation
Requirements for Lightning Protection Systems, and UL 467, Grounding and
Bonding Equipment.


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