Engineering Labels for Cables. Introduction to Labels. Information Carried on Labels. Affixing Labels to the Signal Cable, страница 2

D.1  Introduction to Labels

D.1.1  Material

Features of the label material:

n  Thickness: 0.09 mm

n  Color: chalk white

n  Material: Polyester (PET), with UL and CSA certification

n  Ambient temperature: –29^oC to149^oC

n  Laser printed or handwritten with oiliness markers

D.1.2  Type and Shape

There are two types of engineering labels: one for power cables and the other for signal cables.

1.  Labels for Signal Cables

The labels for signal cables are L-shaped in fixed dimensions, as shown in Figure D-1:

(1) Cut dotted line

(2) Dividing line

Figure D-1 Label for signal cables

The dividing lines on the label help to specify more clearly the position of a cable. For example, there is one between the cabinet number and the subrack number and another one between the subrack number and the slot number. The dividing lines are 1.5 mm x 0.6 mm in size with the color of PONTONE 656c (light blue).

The cut dotted line helps to fold the label affixed to the cable. Its size is 1.0 mm x 2.0 mm.

There is a mark “TO:” (upside down in the figure) at the lower right corner of the label. It identifies the opposite end of the cable on which the label is affixed.

2.  Labels for Power Cables

The label for power cables should be attached to the identification plate and then bundled to the power cable with a cable tie. The identification plate has an embossment of 0.2 mm ´ 0.6 mm around (symmetric on both sides), and the area in the middle is for affixing the label, as shown in Figure D-2.

(1) Dividing line on the label

(2) Identification plate of the power cable

(3) Cable tie

Figure D-2 Label for power cables

D.2  Information Carried on Labels

This section only describes the common points for using labels. For details on how to fill in the labels for a specific cable, refer to section “D.5 Common Engineering Labels” in this chapter.

D.2.1  For Power Cables

Labels for power cables are only affixed on one side of the identification plates. On the labels, there is information (the part after the mark “TO:”) about the location of the device on the other end of the cable, like the location of the peer equipment, control cabinet, cable distribution box or power socket.

D.2.2  For Signal Cables

A label properly affixed on the signal cable has two sides, which carry information about the locations of the ports connected to both ends of the cable.

The information is given like this (refer to Figure D-3):

n  Area 1 contains the location information of local end of the cable.

n  Area 2 (with the mark "TO:") contains the location information of the opposite end of the cable.

n  Area 3 has been folded up inside the label.

Seen from the cable outlet end of the equipment, the text part of the label is on the right side of the cable. The side with “TO:” that is facing outside carries the location information of the opposite end; and the other side carries the location information of the local end. Therefore, the information in Area 1 at one end is the same as the information in Area 2 at the other end of the cable, and the opposite is also true. In other words, the local information at one end is called the opposite information at the other end.

Figure D-3 Label for signal cables

D.2.3  Points for Attention

n  When printing/writing and affixing labels, keep them clean.

n  Since the label paper is made of moistureproof and waterproof material, ink-jet printers/ink pens cannot be used to print/write labels.