MIL-STD-1130 Connections, Electrical, Solderless WrappedThis standard establishes the requirements to produce mechanically and electrically stable, solderless wrapped, electrical connections made with single, solid, round wire and appropriately designed wrapposts terminals.This standard includes:a. Classes and requirements for solderless wrapped connections. b. Description and requirements for the wire used in making the solderless wrapped connections. c. Description and requirements for the wrappost used in making the solderless wrapped connections.

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MIL-STD-1130C

5.3.2.1  Visual inspection criteria.  All solderless wrapped connections shall visually conform to the requirements of this document.  The following defects detectable by visual inspection shall be cause for rejection.

a.    No insulation or insufficient insulation in contact with wrappost.  (See figure 5.)

FIGURE 5.  Insufficient insulation wrap.

b.    Improper wrapper spacing and overlapped wrappers.  There shall be no overlapping within the minimum specified number of turns of uninsulated wire except that the first turn of insulated wire in a modified solderless wrapped connection may overlap the last turn of uninsulated wire in a connection below it on the same terminal.  Insulation must make contact bite with a minimum of three corners.  (See figures 6 and 7.)

ACCEPTABLE                           REJECTION

FIGURE 6.  Overlap.                                             FIGURE 7.  Improper spacing.

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