The busbar trunking system (from 800A), both feeder and plug-in, shall be sandwich construction. All busbar trunking products and fittings (straight length, elbow, tees, flanged ends, cable tap box and circuit breaker, etc.) shall be in accordance with IEC 60439:2005 or UL857 and from the same manufacturer as the busbar trunking system. The degree of protection of the busbar trunking system should be IP54 in accordance to IEC 60529.
Rated operation voltage of the busbar trunking is 1000V. 3 Phase, 4 Wire with 50% capacity continual integral/internal earth busbar. The neutral conductor should have the same cross-sectional area as the phase conductor (3P 4W 100%N + 50%E). The earth busbar must be one continuous piece without bolting on housing.
Busway is used to transmit power instead of conventional power cable.