distribution board 
noun
A panel carrying the fuses, terminals, and other components of a number of subsidiary electric circuits.A fire that killed a 92-year-old man was started by a fault on an electricity distribution board on the ground floor of his three-storey home....
- The computer system includes a first plurality of circuit boards, a plurality of switch circuit boards and a first and second power distribution board.
- The fire broke out in an airing cupboard when a distribution board overheated and fell to the floor setting fire to linen and towels.