ADMINISTRATIVE MESSAGE
ROUTINE       
R 141557Z FEB 97  ZYB
FM COMNAVSURFPAC SAN DIEGO CA//N01//

TO NAVSURFPAC AFLOAT

UNCLAS  //N05100//

MSGID/GENADMIN/COMNAVSURFPAC N41//

SUBJ/SILVER-PLATED FUSE FERRULES//

REF/A/DOC/NSTM/01FEB96//
AMPN/REF A IS NSTM CH. 300R3, PARA 300-2.5.4.1, USE OF
SILVER-PLATED FUSE FERRULES AND FUSE CLIPS PREVENT CORROSION//

POC/T. STEFANIK/CNSP N418-/TEL:DSN 577-3070:(619)437-3070//

RMKS/1.  REF A PROVIDES INFORMATION ON THE USE OF SILVER-PLATED
FERRULES TO MINIMIZE CORROSION BETWEEN FUSE FERRULES AND FUSE
CLIPS.  CORROSION PREVENTION IS CRITICAL TO PREVENT HIGH
RESISTANCE AND LOCAL HEATING THAT CAN CAUSE FUSE LINKS TO MELT.

2.  PRESINSURV REPORTS A NUMBER OF SHIPS STILL USING NICKEL AND
BRASS FERRULE FUSES.  SHIPS ARE TO IMPLEMENT CHANGE OUTS PER
REF A.

3.  SHIPS SHOULD MAKE EVERY EFFORT TO REPLACE NICKEL AND BRASS
FERRULE FUSES USING THE FOLLOWING PRECEDENTS:
    A.  FUSES WITH SILVER-PLATED FERRULES SHOULD BE MATCHED WITH
SILVER-PLATED FUSE CLIPS.  THIS IS IDEAL CORROSION PREVENTION BUT
IS NOT ALWAYS POSSIBLE.

    B.  FUSES WITH SILVER-PLATED FERRULES CAN BE USED IN
CONJUNCTION WITH BRASS FUSE CLIPS.

    C.  SHIPBOARD ELECTRONIC EQUIPMENT MAY BE DESIGNED WITH
NON-SILVER FERRULE FUSES.  THIS WOULD BE AN EXCEPTION AND AN
AUTHORIZED USE OF BRASS FUSES AND CLIPS.  OTHER SITUATIONS MAY BE
THE PURCHASE OF COMMERCIAL TYPE EQUIPMENT EMBELLISHED WITH BRASS
FUSES. 

4.  ANY FUSE REPLACEMENTS MUST FOLLOW SAFETY PRECAUTIONS FOUND IN
REF A, NSTM PARA 300-2.5.4.  IN ADDITION, FUSE CLIP REPLACEMENTS
SHOULD BE A GRADUAL INSTALLATION BASED UPON MANPOWER, EASE OF
ACCESS OR MAINTENANCE SCHEDULES.

5.  BOTTOM LINE: ONCE SILVER-PLATED FERRULES AND CLIPS ARE IN
PLACE, REPLACE WORN COMPONENTS ONLY WITH SILVER-PLATED AND NEVER
BRASS OR NICKEL FUSE FERRULES OR FUSE CLIPS.//
BT