Norivay 



299 



metal foil connected to earth. The cables are slung by galvanised 

 iron hangers from stranded steel suspenders, and at their junctio 

 with the open wires, which takes place as soon as the crowded 

 vicinity of the central station is cleared, are passed through joint 

 boxes fitted with lightning arresters. The standards are well 

 designed, and carefully erected with due regard to safety in the 



FIG. io2A 



face of untoward fires or storms. The single form (figs. 102 and 

 I02A) consists of a wrought-iron tube fitted with English angle-iron 

 cross-arms. The foot-plates and fastenings are all of Swedish iron. 

 The standard is sometimes placed on the slope of a roof (fig. I02B) 

 instead of on the ridge. A triple standard for 300 wires, with its 

 details, is shown in figs. 103 and 103 A. In this case the uprights- 



