Cables
6
2.2.2.1 Outdoor
2.2.2 Thunder-Proof Cable Connection
The following installation figures are for reference only, and the actual product
shall prevail. This chapter takes PTZ camera as an example.
Transient voltage suppressor (TVS) is applied to protect the Device against
voltage spikes and overvoltage below 6000V. However, it is still necessary to do
operations to protect the Device according to actual conditions.
The signal transmission cable must stay at least 50m away from high
voltage devices and high voltage wires.
When laying cables outdoors, try to lay them under the eaves.
At open places, lay cables underground by means of hermetic steel tube,
and then do equipotential grounding to both ends of steel tubes. Laying
overhead power cables are prohibited.
At places with severe thunderstorms and induced voltage (like
substation), you need to prepare high-powered lightning protection devices
and lightning conductors.
When laying cables and connecting lightning protection devices, you
must comply with regional laws and regulations.
You must do equipotential grounding to the electric system. The
grounding device must meet the requirements of anti-jamming and conform to
your local electrical safety code. The grounding device shall not form short
circuit to N (neutral) line of high voltage power grid or be mixed with other wires.
When the electrical system is connected to the ground cable, the impedance
cannot exceed 4Ω and the cross-sectional area of the earth lead cannot
exceed 25 mm
2
.
