6.5 Lightening protection
6.5.1 At the building or the storage area of flammable chemical or gas, emission stack, the lightning prevention system shall be installed according to the engineering standard.
6.5.2 The conducting line for lightning prevention specification and installation shall be complied with the standard of local power board or standard of Thailand engineering association. The conducting line holder shall be copper or metal-copper and has a range between holder not more than 1.2 m in vertical and 60 cm. in horizontal line.