Should lightning protection be connected to main earth?
Normally the connection should be from one of the down conductors of the lightning protection system closest to the electrical installation main earthing terminal by the most direct route available. Bonding connections should not be made without consulting the designer/lightning protection engineer.
Is lightning protection a code requirement?
Lightning protection systems for structures are typically not a requirement of national building codes, although the Standards may be adopted by the authority having jurisdiction for general construction or specific occupancies.
Do blocks of flats need lightning conductors?
It is not a legal requirement for all buildings and structures to have lightning protection, according to the risk control publication RC35 ‘Protection of buildings against lightning strikes’.
What is the good earth resistance value?
Ideally a ground should be of zero ohms resistance. There is not one standard ground resistance threshold that is recognized by all agencies. However, the NFPA and IEEE have recommended a ground resistance value of 5.0 ohms or less.
How much area does a lightning rod cover?
On structures less than 30 metres (about 100 feet) in height, a lightning rod provides a cone of protection whose ground radius approximately equals its height above the ground. On taller structures, the area of protection extends only about 30 metres from the base of the structure.
Should all buildings have lightning protection?
According to RC 35 ‘Protection of buildings against lightning strikes’, a risk control publication, it is not a legal requirement for all buildings and structures to have lightning protection. However, the Electricity at Work Regulations 1989 do apply to most businesses.
Should I fit a lightning conductor?
If you live in a very tall home, have trees taller than your home less than 10 feet away from its structure, or live in an area with a high lightning strikes, however, installing a lightning rod is recommended.