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are not pinched in cable clamps. Where possible, mount them directly to structural members.  [Figure 4-94] 

Clamps can be used with rubber cushions to secure wire bundles to tubular structures. [Figure 4-95]  Such clamps must fit tightly but should not be deformed when locked in place. 

## Lacing and Tying Wire Bundles 

Wire groups and bundles are laced or tied with cord to provide ease of installation, maintenance, and inspection. This section describes and illustrates recommended procedures for lacing and tying wires with knots that hold tightly under all conditions. For the purposes of this discussion, the following terms are defined: 

1. Tying is the securing together of a group or bundle of wires by individual pieces of cord tied around the group or bundle at regular intervals. 

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2. Lacing is the securing together of a group or bundle of wires by a continuous piece of cord forming loops at regular intervals around the group or bundle. 

The material used for lacing and tying is either cotton or nylon cord. Nylon cord is moisture- and fungus-resistant, but cotton cord must be waxed before using to give it these necessary protective characteristics. 

## Single-Cord Lacing 

Figure 4-96  shows the steps in lacing a wire bundle with a single cord. The lacing procedure is started at the thick end of the wire group or bundle with a knot consisting of a clove 

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