3-5
manual for the equipment. If the cables connect equipment between compartments on a ship, they will be
marked by the shipboard cable-numbering system previously described.
On the conductor lead, at the end near the point of connection to a terminal post, spaghetti sleeving is
used as a marking material and an insulator. The sleeving is marked with identifying numbers and letters
and then slid over the conductor. The marking on the sleeving identifies the conductor connections both
"to" and "from" by giving the following information (figure 3-4):
Figure 3-4.—Designating conductor marking between unlike terminals.
The terminal "from"
The terminal board "to"
The terminal "to."
These designations on the sleeving are separated by a dash. The order of the markings is such that
the first set of numbers and letters reading from left to right is the designation corresponding to the
terminal "from" which the conductor runs. Following this is the number of the terminal board "to" which
the conductor runs. ("TB" is omitted when the sleeve is marked.) The third designation is the terminal
"to" which the conductor runs.
For example, as shown in figure 3-4, the conductor is attached to terminal 2A of terminal board 101
(terminal "from" 2A on the spaghetti sleeving). The next designation on the sleeving is 401, indicating it
is going "to" terminal board 401. The last designation is 7B, indicating it is attached "to" terminal 7B of
TB 401. The spaghetti marking on the other end of the conductor is read the same way. The conductor is
going "from" terminal 7B on terminal board 401 "to" terminal 2A on terminal board 101.
On occasion, it may be necessary to run conductors to units that have no terminal board numbers; for
example, a junction box. In this case, an easily recognizable abbreviation may be used in place of the
terminal board number on the spaghetti sleeving. The designation "JB2" indicates that the conductor is
connected to junction box No. 2. A conductor to junction box No. 2 of a piece of equipment would be
identified as shown in figure 3-5. In the same manner, a plug would be identified as "P." This P number
would be substituted for the terminal board number marking on the sleeving.
