The tables are shown Tables 14.
Cables run off will not twist,
a short length conduit can
be used axle for
the cable drum
Cables allowed to
spiral off drum
will become twisted
FIGURE 14.26
Running off cable from drum.
FLEXIBLE CONDUIT
Flexible conduit manufactured 731-1: 1993 made interlinked
metal spirals often covered with PVC sleeving.
● Multiply the cable factor the number conductors, give the
sum the cable factors. Having decided upon the type, size and
number cables required for final circuit, then necessary select
the appropriate size conduit accommodate those cables.
Definition
Single-PVC insulated conductors are
usually drawn into the installed con-
duit complete the installation.7.
. The cable
insulation must not damaged the metal edges the draw-in box.
● Identify the appropriate part the conduit factor table given the
length run and number bends, see Table 14.6 and 14.
The tables Appendix the Site Guide describe ‘factor system’
for determining the size conduit required enclose number con-
ductors.
Flexible conduit used for the final connection motors that the
vibrations the motor are not transmitted throughout the electrical
installation and allow for modifications made the final motor
position and drive belt adjustments.
Definition
Flexible conduit manufactured BS
731-1:1993 made interlinked
metal spirals often covered with PVC
sleeving.Basic Electrical Installation Work
308
Cables should fed into the conduit manner which prevents any
cable crossing over and becoming twisted inside the conduit. The method as
follows:
● Identify the cable factor for the particular size conductor, see
Table 14.
A limit must placed the number bends between boxes con-
duit run and the number cables which may drawn into conduit to
prevent the cables being strained during wiring.6.
CONDUIT CAPACITIES
Single-PVC insulated conductors are usually drawn into the installed con-
duit complete the installation.1). The draw
wire itself may drawn fish tape, which thin spring steel or
plastic tape. The tubing must not be
relied upon provide continuous earth path and, consequently, sepa-
rate CPC must run either inside outside the flexible tube (Regulation
543.7.2.
● The correct size conduit accommodate the cables that con-
duit which has factor equal greater than the sum the cable
factors.
Cables can pulled draw wire the run long one. Appendix the Site
Guide gives guide the cable capacities conduits and trunking
