DAKEN Users Manual – PAGE 9
Figure 4 – Warning plate symbol
6. The
energiser earth electrode
shall penetrate the ground to a depth of at least 1 m.
7.
Connecting leads
that are run inside buildings shall be effectively insulated from the earthed structural
parts of the building. This may be achieved by using insulated high voltage cable.
8.
Connecting leads
that are run underground shall be run in a conduit of insulating material or else
insulated high voltage cable shall be used. Care shall be taken to avoid damage to the
connecting leads
due to the effects of animal hooves or tractor wheels sinking into the ground.
9.
Connecting leads
shall not be installed in the same conduit as the mains supply wiring, communicating
cables or data cables.
10.
Connecting leads
and
electric fence
wires shall not cross above overhead power or communication
lines.
11. Crossings with overhead power lines shall be avoided wherever possible. If such a crossing cannot be
avoided, it shall be made underneath the power line and as nearly as possible at right angles to it.
12. If
connecting leads
and
electric fence
wires are installed near an overhead power line, the
clearances shall be not less than those shown in table 3.
13. If
connecting leads
and
electric fence
wires are installed near an overhead power line, their height
above the ground shall not exceed 2 m. This height applies either side of the orthogonal projection of the
outermost conductors of the power line on the ground surface, for a distance of
* 2 m for power lines operating at a nominal voltage not exceeding 1,000 V
* 15 m for power lines operating at a nominal voltage exceeding 1,000 V.
3
Power line voltage V
Clearance in metres
4
8
<=1000
>=1000 <=33 000
>33 000
Table 3 - Minimum Clearances from Power Lines
