Electrical connection box to be mounted on a vehicle

A vehicle comprising:

• an engine compartment having an upstanding wall surface;
• a voltage source having a nominal maximum output voltage of not less than about 14V and not more than about 200V;
• an electrical connection box mounted in said engine compartment and comprising:
• a casing having a rear wall located on said upstanding wall surface of said engine compartment, a front wall spaced from said rear wall, a pair of side walls extending between said front and rear walls and a bottom wall sloping downwardly in the direction from said front wall to said rear wall, said bottom wall having at least one water drainage hole at its lowermost portion adjacent said rear wall;
• and
• a plurality of electrical circuit insulation plates mounted in said casing having main faces parallel to said rear wall, and a plurality of bus bars mounted on said main faces,
• wherein said casing has one or more electrical relay receiving elements, one or more electrical fuse receiving elements and one or more electrical connector receiving elements located on at least one of said front and side walls;
• a plurality of electrical relays received in said electrical relay receiving elements;
• a plurality of electrical fuses received in said electrical fuse receiving elements;
• and
• a plurality of electrical connectors received in said electrical connector receiving elements;
• wherein at least one of said bus bars is electrically connected to said voltage source.