2.  Current load is 10 amps. 3.  The voltage source is 115 volts from bus to equipment. 4.  The circuit has intermittent operation. Step 1—From the left scale, find the wire length of 200 feet  under the 115V source column. Step 2—Follow the corresponding horizontal line to the right  until it intersects the slanted line for the 10-amp load. Step 3—At this point, drop vertically to the bottom of the  chart. The value falls between No. 16 and No. 14. Select the  next larger size wire to the right—in this case, No. 14. This is  the smallest size wire that can be used without exceeding the  voltage drop limit expressed at the bottom of the left scale.  identified. Wires 3 to 7 inches in length should be identified  approximately at the center. Added identification marker  sleeves should be located so that ties, clamps, or supporting  devices need not be removed to read the identification. The  wire identification code must be printed to read horizontally  (from left to right) or vertically (from top to bottom). The two  methods of marking wire or cable are as follows: The proper identification of electrical wires and cables  with their circuits and voltages is necessary to provide  safety of operation, safety to maintenance personnel, and  ease of maintenance. All wire used on aircraft must have  its type identification imprinted along its length. It is  common practice to follow this part number with the five  digit/letter Commercial and Government Entity (CAGE)  code identifying the wire manufacturer. You can identify  the performance capabilities of existing installed wire you  need to replace, and avoid the inadvertent use of a lower  performance and unsuitable replacement wire.  The preferred method is to mark directly on the wire without  causing insulation degradation. Teflon-coated wires, shielded  wiring, multiconductor cable, and thermocouple wires  usually require special sleeves to carry identification marks.  There are some special wire marking machines available that  can be used to stamp directly on the type wires mentioned  above. Whatever method of marking is used, the marking  should be legible and the color should contrast with the wire  insulation or sleeve. Several different methods can be used to mark directly on  the wire: hot stamp marking, ink jet printers, and laser jet  printers.  [Figure 9-126]  The hot stamp method can damage  the insulation of a newer type of wire that utilizes thin  Identification markings should be placed at each end of the  wire and at 15-inch maximum intervals along the length  of the wire. Wires less than 3 inches in length need not be  Types of Wire Markings  Placement of Identification Markings Wire Identification 1.  Direct marking is accomplished by printing the cable’s  outer covering.  [Figure 9-124B] 2.  Indirect marking is accomplished by printing a heat- shrinkable sleeve and installing the printed sleeve on  the wire or cables outer covering. Indirectly-marked  wire or cable should be identified with printed  sleeves at each end and at intervals not longer than  6 feet.  [Figure 9-125]  The individual wires inside  a cable should be identified within 3 inches of their  termination.  [Figure 9-124A] Figure 9-124.  Wire markings for single wire without sleeve.  H215A20 WHITE H246A20 BLUE H217A20 ORANGE 3 inches max 3 inches max 15 inches max 3 inches max W h i t e B l u e O r a n g e W h i t e B $_{l}$u e O r a n g e H215A20 H215A20 H215A20 3 inches 3 inches 15 inches 15 inches A. Multiple wires in a sleeve B. Single wire without sleeve 9-77