An external Lightning Protection System (LPS) is intended to:
Air termination network is made up of vertical air terminals and / or a lattice of copper conductors mounted on the roof and edges of the structure to protect the structure from a lightning strike.
Protection Level
There are four levels of lightning protection. Level I is the highest degree of protection. For the
purpose of complying with Singapore Building Control Regulations, a minimum of Class III LPS is
required.
Air terminals should be connected to as many down conductors as possible.
Lightning rods on a house should be connected to at least two down conductors (at opposite
corners of the house for example).
Separation distance of the down conductors has to be in
accordance to the Class of LPS.
There are two basic earth electrode arrangements being used:
1. Type A arrangement : consists of horizontal or vertical earth electrodes, connected to each down conductor fixed on the outside of the structure. The total number of earth electrodes shall not be less than two.
2. Type B arrangement : a ring earth electrode that is sited around the periphery of the structure.
All metal work, including water pipes, gas pipes, handrails, air conditioning units, metal cladding,
metal roofs etc, in the vicinity of the LPS must be bonded to it, to avoid the danger of side flashing.
For the same reason, the LPS earth should be bonded to the main electrical earth, as well as any other earthing system present in the structure.
Copyright © New Starlight Industries Pte Ltd - All Rights Reserved
As part of our policy of continuous
product improvement, we reserve the right to alter product design, material and specification without prior notice.