The 5-Second Trick For lightning rod installation Prague
The 5-Second Trick For lightning rod installation Prague
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Where present carrying conductors are specifically affiliated with structures coming in the scope of this Code, specific recommendations regarding them are involved; even so, the safety of overhead phone wires, radar stations, electric traction and supply lines should, on account of their Exclusive character, be referred towards the specialists.
An instance is presented underneath with the calculation-needed to decide regardless of whether to bond metalwork into a lightning protecting program:
the construction being utilized for roofs and walls in order to find out ideal methods of repairing conductors, especially that has a watch to keeping the temperature-tightness on the construction;
When earth rods are used, they should be driven into the ground beneath, or as shut as practicable to, the composition and down conductor. The follow of siting terminations 2·5 m to three m far from the creating is unnecessary and uneconomical (see Fig.
Every down conductor needs to be furnished using a check clamp in such a placement that, even though not inviting unauthorized interference, it's convenient for use when screening.
Where by the situations while in the preceding paragraph cannot be fulfilled, safeguards must be taken in order that the lightning latest can be discharged to earth with out damage to the framework and its occupants as specified under:
Also, the Code recognizes The reality that wide versions within the architecture of the structures and during the topography and atmospheric circumstances in different portions of the nation involve that significant flexibility in the design with the protective process ought to be presented.
Tv/radio installers—Arrangement ought to be attained on the need to bond aerial supports and screens of cables towards the lightning protecting program.
When function has started to the installation of the lightning protective process, an earth relationship need to be maintained always.
In certain spots, in which lightning incidence is superior but where the use of copper or aluminium could be economically unjustifiable or be usually inadvisable, galvanized mild metal wire can be utilized for the protection of smaller farmsteads or related buildings. It should really encompass only one strand, not fewer than get more info 6 mm in diameter erected to span the roof and finishes on the construction and to continue into the bottom at a depth of 0·five m for a distance of three m (Fig. 36). Supports could possibly be timber, arranged to supply a clearance of not fewer than 0·nine m through the roof.
During the correcting on the conductors, allowance must be created for swaying within the wind along with the organic development in the tree.
* A construction of uncovered metallic that is steady down to floor level is excluded from these tablet because it involves no lightning protection past ample earthing arrangements.
A conductor intended to present electrical connection amongst the lightning protective program and also other metalwork and amongst several parts in the latter.
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