Trade of Electrician Motor Control COURSE NOTES - eCollege

FAS Electrical Course Notes – Module 2.4.2
Wiring of Enclosure Doors
Figure 11 illustrates a typical method of wiring an enclosure door. The wiring between the main
frame and the front panel should allow the door to open and close without undue strain on the
wires. A loop clamped between two points is the usual method.
Figure 11
Figure 12 illustrates how wiring from the loop is usually cable tied or laced and then clipped to
the door at convenient intervals. Flexible stranded cable should be used covered with an overall
PVC sheath, e.g. spiral wrap.
Note: The door of a steel enclosure can be regarded as an exposed conductive part and
therefore is required to be earthed. The metal hinge is not sufficient to meet this requirement.
Identification Tags
Figure 12
Cable markers are used to identify cables, wiring systems etc. It is desirable that wiring shall be
arranged or marked so that it can be identified for inspection, testing, repairs or alterations of
the installation. One practical way of quickly and easily identifying panel wires ( when trouble
shooting etc ), is by using cable marking tape. This marking tape, which is purchased in rolls
with various legends, is simply placed in a dispenser, which cuts the tape to any length
required.
12
Revision 4. Feb 2009