- Reaction score
- 3,915
It got silly in the 90's,cant remember the edition of IEE regs, you were throwing G/Y everywhere, if you stood still too long would of got one attached to your ankle.With regarding the backing box presumably this is to carry away fault current under fault because this is a device likely to become live yet Cable tray isn't Exposed or Extraneous conductive part but SWA is - basically it's all unclear and shouldn't require hours of research and contradictory advice.